FEATURES DESCRIPTIO APPLICATIO S TYPICAL APPLICATIO. LT1170/LT1171/LT kHz, 5A, 2.5A and 1.25A High Efficiency Switching Regulators

Save this PDF as:
 WORD  PNG  TXT  JPG

Size: px
Start display at page:

Download "FEATURES DESCRIPTIO APPLICATIO S TYPICAL APPLICATIO. LT1170/LT1171/LT1172 100kHz, 5A, 2.5A and 1.25A High Efficiency Switching Regulators"

Transcription

1 FEATRES Wide Input Voltage Range: 3V to 6V Low Quiescent Current: 6mA Internal 5A Switch (2.5A for LT1171, 1.25A for LT1172) Shutdown Mode Draws Only 5µA Supply Current Very Few External Parts Required Self-Protected Against Overloads Operates in Nearly All Switching Topologies Flyback-Regulated Mode Has Fully Floating Outputs Comes in Standard 5-Pin Packages LT1172 Available in 8-Pin MiniDIP and Surface Mount Packages Can Be Externally Synchronized APPLICATIO S Logic Supply 5V at 1A 5V Logic to ±15V Op Amp Supply Battery pconverter Power Inverter ( to ) or ( to ) Fully Floating Multiple Outputs SER NOTE: This data sheet is only intended to provide specifications, graphs, and a general functional description of the LT117/LT1171/LT1172. Application circuits are included to show the capability of the LT117/LT1171/LT1172. A complete design manual (AN19) should be obtained to assist in developing new designs. This manual contains a comprehensive discussion of both the LT17 and the external components used with it, as well as complete formulas for calculating the values of these components. The manual can also be used for the LT117/LT1171/LT1172 by factoring in the higher frequency. A CAD design program called SwitcherCAD TM is also available. LT117/LT1171/LT1172 1kHz, 5A, 2.5A and 1.25A High Efficiency Switching Regulators DESCRIPTIO The LT 117/LT1171/LT1172 are monolithic high power switching regulators. They can be operated in all standard switching configurations including buck, boost, flyback, forward, inverting and Cuk. A high current, high efficiency switch is included on the die along with all oscillator, control and protection circuitry. Integration of all functions allows the LT117/LT1171/LT1172 to be built in a standard 5-pin TO-3 or TO-22 power package as well as the 8-pin packages (LT1172). This makes them extremely easy to use and provides bust proof operation similar to that obtained with 3-pin linear regulators. The LT117/LT1171/LT1172 operate with supply voltages from 3V to 6V, and draw only 6mA quiescent current. They can deliver load power up to 1W with no external power devices. By utilizing current-mode switching techniques, they provide excellent AC and DC load and line regulation. The LT117/LT1171/LT1172 have many unique features not found even on the vastly more difficult to use low power control chips presently available. They use adaptive antisat switch drive to allow very wide ranging load currents with no loss in efficiency. An externally activated shutdown mode reduces total supply current to 5µA typically for standby operation., LTC and LT are registered trademarks of Linear Technology Corporation. SwitcherCAD is a trademark of Linear Technology Corporation. TYPICAL APPLICATIO C3* 1µF Boost Converter (5V to 12V) 5V LT117 L1** 5µH 1k 1µF MB3 1µF *REQIRED IF INPT LEADS 2" ** COILTRONICS PLSE ENGINEERING L2 1µH C3 1µF OTPT FILTER 1.7k 1% 1.24k 1% 117/1/2 TA1 12V 1A POWER (W) ** Maximum Output Power* LT117 BOOST FLYBACK INPT VOLTAGE (V) BCK-BOOST V O = 3V BCK-BOOST V O = 5V * ROGH GIDE ONLY. BCK MODE P OT = (5A)(V OT ) SPECIAL TOPOLOGIES DELIVER MORE POWER. ** DIVIDE VERTICAL POWER SCALE BY TWO FOR LT1171, BY FOR FOR LT1172. LT117/1/2 TA2 1

2 LT117/LT1171/LT1172 ABSOLTE AXI RATI GS W W W Supply Voltage LT117/71/72HV (Note 2)... 6V LT117/71/72 (Note 2)... 4V Switch Output Voltage LT117/71/72HV... 75V LT117/71/ V LT1172S8... 6V Feedback Pin Voltage (Transient, 1ms)... ±15V Storage Temperature Range C to 15 C Lead Temperature (Soldering, 1 sec)... 3 C (Note 1) Operating Junction Temperature Range LT117/71/72M C to 15 C LT117/71/72HVC, LT117/71/72C (Oper.)... C to 1 C LT117/71/72HVC LT117/71/72C (Sh. Ckt.)... C to 125 C LT117/71/72HVI, LT117/71/72I (Oper.)... 4 C to 1 C LT117/71/72HVI, LT117/71/72I (Sh. Ckt.)... 4 C to 125 C C I W PACKAGE/ORDER I FOR ATIO NC* 4 J8 PACKAGE 8-LEAD CERDIP T JMAX = 15 C, θ JA = 1 C/W (J) T JMAX = 1 C, θ JA = 1 C/W (N) T JMAX = 1 C, θ JA = 12 C/W to 15 C/W depending on board layout (S) 1172 T JMAX θ JC θ JA LT117MK 15 C 2 C/W 35 C/W LT117CK 1 C 2 C/W 35 C/W LT1171MK 15 C 4 C/W 35 C/W LT1171CK 1 C 4 C/W 35 C/W LT1172MK 15 C 8 C/W 35 C/W LT1172CK 15 C 8 C/W 35 C/W Based on continuous operation. T JMAX = 125 C for intermittent fault conditions. T JMAX = 1 C, θ JA = * C/W TOP VIEW S8 PACKAGE 8-LEAD PLASTIC SO 8 E2 7 6 E1 5 N8 PACKAGE 8-LEAD PDIP * Do not connect Pin 4 of the LT1172 DIP or SO to external circuitry. This pin may be active in future revisions. FRONT VIEW Q PACKAGE 5-LEAD DD BOTTOM VIEW K PACKAGE 4-LEAD TO-3 METAL CAN CASE IS *θ will vary from approximately 25 C/W with 2.8 sq. in. of 1oz. copper to 45 C/W with.2 sq. in. of 1oz. copper. Somewhat lower values can be obtained with additional copper layers in multilayer boards. LT117CQ LT117IQ LT1171CQ LT1171IQ ORDER PART NMBER LT1172MJ8 LT1172CJ8 LT1172CN8 LT1172IN8 LT1172CS8 LT1172IS8 S8 PART MARKING 1172I ORDER PART NMBER LT117MK LT117CK LT1171MK LT1171CK LT1172MK LT1172CK ORDER PART NMBER LT1171HVCQ LT1172CQ LT1172HVIQ NC 1 NC NC 6 NC 7 NC 8 TOP VIEW 16 NC 15 NC 14 E E NC 9 NC SW PACKAGE 16-LEAD PLASTIC SO WIDE T JMAX = 1 C, θ JA = 15 C/W Based on continuous operation. T JMAX = 125 C for intermittent fault conditions. FRONT VIEW T PACKAGE 5-LEAD PLASTIC TO-22 T JMAX θ JC θ JA LT117CT/LT117HVCT 1 C 2 C/W 75 C/W LT1171CT/LT1171HVCT 1 C 4 C/W 75 C/W LT1172CT/LT1172HVCT 1 C 8 C/W 75 C/W Based on continuous operation. T JMAX = 125 C for intermittent fault conditions. ORDER PART NMBER LT1172CSW ORDER PART NMBER LT117CT LT117IT LT117HVCT LT117HVIT LT1171CT LT1171IT LT1171HVCT LT1172CT LT1172HVCT 2

3 LT117/LT1171/LT1172 ELECTRICAL CHARACTERISTICS The denotes the specifications which apply over the full operating temperature range, otherwise specifications are at T A = 25 C. = 15V, =.5V, V = V REF, output pin open, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX NITS V REF Reference Voltage Measured at Feedback Pin V =.8V V I B Feedback Input Current V = V REF na 11 na g m Error Amplifier I C = ±25µA µmho Transconductance 24 7 µmho Error Amplifier Source or = 1.5V µa Sink Current 12 4 µa Error Amplifier Clamp Hi Clamp, V = 1V V Voltage Lo Clamp, V = 1.5V V Reference Voltage Line 3V V MAX.3 %/V Regulation =.8V A V Error Amplifier Voltage Gain.9V 1.4V 5 8 V/V Minimum Input Voltage (Note 5) V I Q Supply Current 3V V MAX, =.6V 6 9 ma Control Pin Threshold Duty Cycle = V V Normal/Flyback Threshold V on Feedback Pin V Flyback Reference Voltage I = 5µA V (Note 5) V Change in Flyback Reference.5 I 1mA V Voltage Flyback Reference Voltage I = 5µA.1.3 %/V Line Regulation (Note 5) 7V V MAX Flyback Amplifier I C = ±1µA µmho Transconductance (g m ) Flyback Amplifier Source =.6V Source µa and Sink Current I = 5µA Sink µa BV Output Switch Breakdown 3V V MAX, LT117/LT1171/LT V Voltage I SW = 1.5mA LT117HV/LT1171HV/LT1172HV 75 9 V LT1172S8 6 8 V V SAT Output Switch LT Ω On Resistance (Note 3) LT Ω LT Ω Control Voltage to Switch LT117 8 A/V Current Transconductance LT A/V LT A/V I LIM Switch Current Limit (LT117) Duty Cycle = 5% T J 25 C 5 1 A Duty Cycle = 5% T J < 25 C 5 11 A Duty Cycle = 8% (Note 4) 4 1 A (LT1171) Duty Cycle = 5% T J 25 C A Duty Cycle = 5% T J < 25 C A Duty Cycle = 8% (Note 4) A (LT1172) Duty Cycle = 5% T J 25 C A Duty Cycle = 5% T J < 25 C A Duty Cycle = 8% (Note 4) A 3

4 LT117/LT1171/LT1172 ELECTRICAL CHARACTERISTICS The denotes the specifications which apply over the full operating temperature range, otherwise specifications are at T A = 25 C. = 15V, =.5V, V = V REF, output pin open, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX NITS I IN Supply Current Increase ma/a I SW During Switch On-Time f Switching Frequency khz khz DC MAX Maximum Switch Duty Cycle % Shutdown Mode 3V V MAX 1 25 µa Supply Current =.5V Shutdown Mode 3V V MAX mv Threshold Voltage 5 3 mv Flyback Sense Delay Time (Note 5) 1.5 µs Note 1: Absolute Maximum Ratings are those values beyond which the life of the device may be impaired. Note 2: Minimum effective switch on time for the LT117/71/72 (in current limit only) is.6µs. This limits the maximum safe input voltage during an output shorted condition. Buck mode and inverting mode input voltage during an output shorted condition is limited to: (max, output shorted) = 15V buck and inverting mode R = Inductor DC resistance (R)(I L ) Vf (t)(f) I L = 1A for LT117, 5A for LT1171, and 2.5A for LT1172 Vf = Output catch diode forward voltage at I L t =.6µs, f = 1kHz switching frequency Maximum input voltage can be increased by increasing R or Vf. External current limiting such as that shown in AN19, Figure 39, will provide protection up to the full supply voltage rating. in Figure 39 should be reduced to 2pF. Transformer designs will tolerate much higher input voltages because leakage inductance limits rate of rise of current in the switch. These designs must be evaluated individually to assure that current limit is well controlled up to maximum input voltage. Boost mode designs are never protected against output shorts because the external catch diode and inductor connect input to output. Note 3: Measured with in hi clamp, V =.8V. I SW = 4A for LT117, 2A for LT1171, and 1A for LT1172. Note 4: For duty cycles (DC) between 5% and 8%, minimum guaranteed switch current is given by I LIM = 3.33 (2 DC) for the LT117, I LIM = 1.67 (2 DC) for the LT1171, and I LIM =.833 (2 DC) for the LT1172. Note 5: Minimum input voltage for isolated flyback mode is 7V. V MAX = 55V for HV grade in fully isolated mode to avoid switch breakdown. TYPICAL PERFOR A CE CHARACTERISTICS W 16 Switch Current Limit vs Duty Cycle* 2.9 Minimum Input Voltage 1.6 Switch Saturation Voltage SWITCH CRRENT (A) C 125 C 25 C * DIVIDE VERTICAL SCALE BY TWO FOR LT1171, BY FOR FOR LT DTY CYCLE (%) 117/1/2 G1 MINIMM INPT VOLTAGE (V) SWITCH CRRENT = I MAX SWITCH CRRENT = A TEMPERATRE ( C) 117/1/2 G2 SWITCH SATRATION VOLTAGE (V) C 15 C 55 C SWITCH CRRENT (A)* 25 C * DIVIDE CRRENT BY TWO FOR LT1171, BY FOR FOR LT /1/2 G3 4

5 LT117/LT1171/LT1172 TYPICAL PERFOR A CE CHARACTERISTICS W 5 Line Regulation 1.25 Reference Voltage vs Temperature 8 Feedback Bias Current vs Temperature REFERENCE VOLTAGE CHANGE (mv) T J = 55 C T J = 15 C T J = 25 C REFERENCE VOLTAGE (V) FEEDBACK BIAS CRRENT (na) INPT VOLTAGE (V) /1/2 G TEMPERATRE ( C) 117/1/2 G TEMPERATRE ( C) 117/1/2 G6 SPPLY CRRENT (µa) Supply Current vs Supply Voltage (Shutdown Mode) T J = 25 C = 5mV = V SPPLY VOLTAGE (V) /1/2 G7 DRIVER CRRENT (ma) Driver Current* vs Switch Current T J = 55 C SWITCH CRRENT (A) T J = 25 C /1/2 G8 * AVERAGE LT117 POWER SPPLY CRRENT IS FOND BY MLTIPLYING DRIVER CRRENT BY DTY CYCLE, THEN ADDING QIESCENT CRRENT. SPPLY CRRENT (ma) Supply Current vs Input Voltage* T J = 25 C NOTE THAT THIS CRRENT DOES NOT INCLDE DRIVER CRRENT, WHICH IS A FNCTION OF LOAD CRRENT AND DTY CYCLE INPT VOLTAGE (V) 9% DTY CYCLE 5% DTY CYCLE 1% DTY CYCLE % DTY CYCLE /1/2 G9 * NDER VERY LOW OTPT CRRENT CONDITIONS, DTY CYCLE FOR MOST CIRCITS WILL APPROACH 1% OR LESS. SPPLY CRRENT (µa) Shutdown Mode Supply Current T J = 15 C C T J 125 C PIN VOLTAGE (mv) 117/1/2 G1 TRANSCONDCTANCE (µmho) Error Amplifier Transconductance 5 45 g m = I ( PIN) V ( PIN) TEMPERATRE ( C) 117/1/2 G11 PIN CRRENT (µa) Pin Characteristics V = 1.5V (CRRENT INTO PIN) T J = 25 C V =.8V (CRRENT OT OF PIN) PIN VOLTAGE (V) 117/1/2 G12 5

6 LT117/LT1171/LT1172 TYPICAL PERFOR A CE CHARACTERISTICS W Idle Supply Current vs Temperature Feedback Pin Clamp Voltage Switch Off Characteristics 11 1 =.6V IDLE SPPLY CRRENT (ma) V SPPLY = 6V V SPPLY = 3V FEEDBACK VOLTAGE (mv) C 25 C 15 C SWITCH CRRENT (µa) V SPPLY = 3V V SPPLY = 15V V SPPLY = 4V V SPPLY = 55V TEMPERATRE ( C) 117/1/2 G FEEDBACK CRRENT (ma) 117/1/2 G SWITCH VOLTAGE (V) 117/1/2 G15 4 Shutdown Thresholds Flyback Blanking Time 23 Isolated Mode Flyback Reference Voltage VC PIN VOLTAGE (mv) CRRENT (OT OF PIN) VOLTAGE 1 1 VOLTAGE IS REDCED NTIL 5 REGLATOR CRRENT DROPS BELOW 3µA TEMPERATRE ( C) 117/1/2 G PIN CRRENT (µa) TIME (µs) JNCTION TEMPERATRE ( C) 117/1/2 G17 FLYBACK VOLTAGE (V) R = 5Ω R = 1k R = 1k TEMPERATRE ( C) 117/1/2 G18 TRANSCONDCTANCE (µmho) k Transconductance of Error Amplifier 1k 1k 1M FREQENCY (Hz) θ g m 117/1/2 G M PHASE (DEG) FEEDBACK PIN VOLTAGE (mv) Normal/Flyback Mode Threshold on Feedback Pin FEEDBACK PIN VOLTAGE (AT THRESHOLD) FEEDBACK PIN CRRENT (AT THRESHOLD) TEMPERATRE ( C) 117/1/2 G FEEDBACK PIN CRRENT (µa) 6

7 OPERATIO LT117/LT1171/LT1172 BLOCK DIAGRA W 16V SWITCH OT 2.3V REG FLYBACK ERROR AMP LT1172 1kHz OSC LOGIC DRIVER 5A, 75V SWITCH MODE SELECT ANTI- SAT COMP ERROR AMP 1.24V REF SHTDOWN CIRCIT.15V CRRENT AMP GAIN 6.2Ω (.4Ω LT1171) (.16Ω LT1172).16 Ω (LT117 AND LT1171 ONLY) E1 ALWAYS CONNECT E1 TO THE GROND PIN ON MINIDIP, 8- AND 16-PIN SRFACE MONT PACKAGES. E1 AND E2 INTERNALLY TIED TO GROND ON TO-3 AND TO-22 PACKAGES. E2 117/1/2 BD The LT117/LT1171/LT1172 are current mode switchers. This means that switch duty cycle is directly controlled by switch current rather than by output voltage. Referring to the block diagram, the switch is turned on at the start of each oscillator cycle. It is turned off when switch current reaches a predetermined level. Control of output voltage is obtained by using the output of a voltage sensing error amplifier to set current trip level. This technique has several advantages. First, it has immediate response to input voltage variations, unlike ordinary switchers which have notoriously poor line transient response. Second, it reduces the 9 phase shift at midfrequencies in the energy storage inductor. This greatly simplifies closedloop frequency compensation under widely varying input voltage or output load conditions. Finally, it allows simple pulse-by-pulse current limiting to provide maximum switch protection under output overload or short conditions. A low dropout internal regulator provides a 2.3V supply for all internal circuitry on the LT117/LT1171/LT1172. This low dropout design allows input voltage to vary from 3V to 6V with virtually no change in device performance. A 1kHz oscillator is the basic clock for all internal timing. It turns on the output switch via the logic and driver circuitry. Special adaptive anti-sat circuitry detects onset of saturation in the power switch and adjusts driver current instantaneously to limit switch saturation. This minimizes driver dissipation and provides very rapid turnoff of the switch. A 1.2V bandgap reference biases the positive input of the error amplifier. The negative input is brought out for output voltage sensing. This feedback pin has a second 7

8 OPERATIO LT117/LT1171/LT1172 function; when pulled low with an external resistor, it programs the LT117/LT1171/LT1172 to disconnect the main error amplifier output and connects the output of the flyback amplifier to the comparator input. The LT117/ LT1171/LT1172 will then regulate the value of the flyback pulse with respect to the supply voltage.* This flyback pulse is directly proportional to output voltage in the traditional transformer coupled flyback topology regulator. By regulating the amplitude of the flyback pulse, the output voltage can be regulated with no direct connection between input and output. The output is fully floating up to the breakdown voltage of the transformer windings. Multiple floating outputs are easily obtained with additional windings. A special delay network inside the LT117/ LT1171/LT1172 ignores the leakage inductance spike at the leading edge of the flyback pulse to improve output regulation. The error signal developed at the comparator input is brought out externally. This pin ( ) has four different functions. It is used for frequency compensation, current limit adjustment, soft starting, and total regulator shutdown. During normal regulator operation this pin sits at a voltage between.9v (low output current) and 2.V (high output current). The error amplifiers are current output (g m ) types, so this voltage can be externally clamped for adjusting current limit. Likewise, a capacitor coupled external clamp will provide soft start. Switch duty cycle goes to zero if the pin is pulled to ground through a diode, placing the LT117/LT1171/LT1172 in an idle mode. Pulling the pin below.15v causes total regulator shutdown, with only 5µA supply current for shutdown circuitry biasing. See AN19 for full application details. Extra Pins on the MiniDIP and Surface Mount Packages The 8- and 16-pin versions of the LT1172 have the emitters of the power transistor brought out separately from the ground pin. This eliminates errors due to ground pin voltage drops and allows the user to reduce switch current limit 2:1 by leaving the second emitter (E2) disconnected. The first emitter (E1) should always be connected to the ground pin. Note that switch on resistance doubles when E2 is left open, so efficiency will suffer somewhat when switch currents exceed 3mA. Also, note that chip dissipation will actually increase with E2 open during normal load operation, even though dissipation in current limit mode will decrease. See Thermal Considerations next. Thermal Considerations When sing the MiniDIP and SW Packages The low supply current and high switch efficiency of the LT1172 allow it to be used without a heat sink in most applications when the TO-22 or TO-3 package is selected. These packages are rated at 5 C/W and 35 C/W respectively. The minidips, however, are rated at 1 C/W in ceramic (J) and 13 C/W in plastic (N). Care should be taken for minidip applications to ensure that the worst case input voltage and load current conditions do not cause excessive die temperatures. The following formulas can be used as a rough guide to calculate LT1172 power dissipation. For more details, the reader is referred to Application Note 19 (AN19), Efficiency Calculations section. Average supply current (including driver current) is: I IN 6mA I SW (.4 DC/4) I SW = switch current DC = switch duty cycle Switch power dissipation is given by: P SW = (I SW ) 2 (R SW )(DC) R SW = LT1172 switch on resistance (1Ω maximum) Total power dissipation is the sum of supply current times input voltage plus switch power: P D(TOT) = (I IN )( ) P SW In a typical example, using a boost converter to generate 12V at.12a from a 5V input, duty cycle is approximately 6%, and switch current is about.65a, yielding: I IN = 6mA.65(.4 DC/4) = 18mA P SW = (.65) 2 (1Ω)(.6) =.25W P D(TOT) = (5V)(.18A).25 =.34W *See note under block diagram. 8

9 OPERATIO LT117/LT1171/LT1172 Temperature rise in a plastic minidip would be 13 C/W times.34w, or approximately 44 C. The maximum ambient temperature would be limited to 1 C (commercial temperature limit) minus 44 C, or 56 C. In most applications, full load current is used to calculate die temperature. However, if overload conditions must also be accounted for, four approaches are possible. First, if loss of regulated output is acceptable under overload conditions, the internal thermal limit of the LT1172 will protect the die in most applications by shutting off switch current. Thermal limit is not a tested parameter, however, and should be considered only for noncritical applications with temporary overloads. A second approach is to use the larger TO-22 (T) or TO-3 (K) package which, even without a heat sink, may limit die temperatures to safe levels under overload conditions. In critical situations, heat sinking of these packages is required; especially if overload conditions must be tolerated for extended periods of time. The third approach for lower current applications is to leave the second switch emitter (minidip only) open. This increases switch on resistance by 2:1, but reduces switch current limit by 2:1 also, resulting in a net 2:1 reduction in I 2 R switch dissipation under current limit conditions. The fourth approach is to clamp the pin to a voltage less than its internal clamp level of 2V. The LT1172 switch current limit is zero at approximately 1V on the pin and 2A at 2V on the pin. Peak switch current can be externally clamped between these two levels with a diode. See AN19 for details. Synchronizing with Bipolar Transistor LT117/LT1171/LT1172 Synchronizing The LT117/LT1171/LT1172 can be externally synchronized in the frequency range of 12kHz to 16kHz. This is accomplished as shown in the accompanying figures. Synchronizing occurs when the pin is pulled to ground with an external transistor. To avoid disturbing the DC characteristics of the internal error amplifier, the width of the synchronizing pulse should be under.3µs. sets the pulse width at.2µs. The effect of a synchronizing pulse on the LT117/LT1171/LT1172 amplifier offset can be calculated from: ( )( ) KT V t f I C S S q C VOS = IC KT = 26mV at 25 C q t S = pulse width f S = pulse frequency I C = source current ( 2µA) = operating voltage (1V to 2V) = resistor used to set mid-frequency zero in frequency compensation network. With t S =.2µs, f S = 15kHz, = 1.5V, and = 2k, offset voltage shift is 3.8mV. This is not particularly bothersome, but note that high offsets could result if were reduced to a much lower value. Also, the synchronizing transistor must sink higher currents with low values of, so larger drives may have to be used. The transistor must be capable of pulling the pin to within 2mV of ground to ensure synchronizing. Synchronizing with MOS Transistor LT117 LT117 2N pF 2.2k 3k FROM 5V LOGIC VN2222* 1N k 1pF 1N4158 FROM 5V LOGIC 117/1/2 OP1 * SILICONIX OR EQIVALENT 117/1/2 OP2 9

10 LT117/LT1171/LT1172 TYPICAL APPLICATIO S Flyback Converter L2 5µH OPTIONAL FILTER V SNB CLAMP TRN-ON SPIKE C4* 1µF 2V TO 3V LT117 D3 25V 1W M1 N* = 1/3 1 N* C4 1µF 2µF V OT 5V 6A 3.74k V V a c I b d V OT V f I PRI N I PRI /N V PRIMARY FLYBACK VOLTAGE = OT Vf N LT117 SWITCH VOLTAGE AREA a = AREA b TO MAINTAIN ZERO DC VOLTS ACROSS PRIMARY SECONDARY VOLTAGE AREA c = AREA d TO MAINTAIN ZERO DC VOLTS ACROSS SECONDARY PRIMARY CRRENT 1.5k.15µF 1.24k I PRI I PRI SECONDARY CRRENT LT117 SWITCH CRRENT *REQIRED IF INPT LEADS 2" t = (I PRI)(L L ) V SNB SNBBER DIODE CRRENT 117/1/2 TA3 LCD Contrast Supply OPTIONAL SHTDOWN E2 VN2222 E1 5V* L1** 5µH LT1172 C4.47µF 1k 15k V BAT * 3V TO 2V 2k 1N914 C3.47µF 1µF TANTALM D3 V OT 1V TO 26V *** 2µF TANTALM, D3 = ER82.4 6mA SCHOTTKY. OTHER FAST SWITCHING TYPES MAY BE SED. * AND BATTERY MAY BE TIED TOGETHER. MAXIMM VALE FOR V BAT IS EQAL TO THE NEGATIVE OTPT 1V. WITH HIGHER BATTERY VOLTAGES, HIGHEST EFFICIENCY IS OBTAINED BY RNNING THE LT1172 PIN FROM 5V. SHTTING OFF THE 5V SPPLY WILL ATOMATICALLY TRN OFF THE LT1172. EFFICIENCY IS ABOT 8% AT I OT = 25mA.,, ARE MADE LARGE TO MINIMIZE BATTERY DRAIN IN SHTDOWN, WHICH IS APPROXIMATELY V BAT /( ). ** FOR HIGH EFFICIENCY, L1 SHOLD BE MADE ON A FERRITE OR MOLYPERMALLOY CORE. PEAK INDCTOR CRRENTS ARE ABOT 6mA AT P OT =.7Ω. INDCTOR SERIES RESISTANCE SHOLD BE LESS THAN.4Ω FOR HIGH EFFICIENCY. *** OTPT RIPPLE IS ABOT 2mV P-P TO 4mV P-P WITH = 2µF TANTALM. IF LOWER RIPPLE IS DESIRED, INCREASE, OR ADD A 1Ω, 1µF TANTALM OTPT FILTER. 117/1/2 TA4 1

11 LT117/LT1171/LT1172 TYPICAL APPLICATIO S (Note that maximum output currents are divided by 2 for LT1171, by 4 for LT1172.) Driving High Voltage FET (for Off-Line Applications, See AN25) External Current Limit 1V TO 2V LT117 G D Q1 5Ω V X 2V LT /1/2 TA5 117/1/2 TA6 Negative-to-Positive Buck-Boost Converter External Current Limit OPTIONAL INPT FILTER L3 C4* 1µF 2V REQIRED IF INPT LEADS 2" LT117 L1** 5µH 2.2k.22µF 1.24k L2 OPTIONAL OTPT FILTER 1µF * ** PLSE ENGINEERING 92114, COILTRONICS THIS CIRCIT IS OFTEN SED TO CONVERT 48V TO 5V. TO GARANTEE FLL SHORT-CIRCIT PROTECTION, THE CRRENT LIMIT CIRCIT SHOWN IN AN19, FIGRE 39, SHOLD BE ADDED WITH REDCED TO 2pF. Q1 C3 V OT 12V 2A 11.3k 117/1/2 TA7 Q1 1k 1pF R S NOTE THAT THE LT117 PIN IS NO LONGER COMMON TO. LT /1/2 TA8 Negative Buck Converter * REQIRED IF INPT LEADS 2" ** PLSE ENGINEERING COILTRONICS C3* 1µF LT117 L1** 5µH 1µF Q1 2N k R4 12k LOAD 5.2V 4.5A OPTIONAL INPT FILTER L3 OPTIONAL OTPT FILTER C4 2µF 2V 1.24k L2 4µH 117/1/2 TA9 11

12 LT117/LT1171/LT1172 TYPICAL APPLICATIO S Positive-to-Negative Buck-Boost Converter D3 1N41 C4 1µF LT117 R5 47Ω, 1W 5k.1µF 1.7k 1.24k L1** 5µH 1V TO 3V C5 1µF* 1N914 C3 2µF R4 47Ω * REQIRED IF INPT LEADS 2" ** PLSE ENGINEERING 92114, COILTRONICS TO AVOID STARTP PROBLEMS FOR INPT VOLTAGES BELOW 1V, CONNECT ANODE OF D3 TO, AND REMOVE R5. MAY BE REDCED FOR LOWER OTPT CRRENTS. (5µF)(I OT ). FOR 5V OTPTS, REDCE TO 1.5k, INCREASE TO.3µF, AND REDCE R6 TO 1Ω. 1µF R6 47Ω V OT 12V 2A 117/1/2 TA1 High Efficiency Constant Current Charger INPT VOLTAGE > V BAT 2V < 35V 2µF 35V 1N µF 35V TANTALM LT1171 VC C3.47µF 1k C4.1µF V LT16 V 25k R4 1k I CHRG = * L2 REDCES RIPPLE CRRENT INTO THE BATTERY BY ABOT 2:1. IT MAY BE OMITTED IF DESIRED. L1 1µH, 1A 1.244V R4 R5 L2* 1µH, 1A = 1A AS SHOWN RN = V SHTDOWN = 5V R6 78k R7 22k 2N394 R8 1k MB4 R5.5Ω 1A C4 2µF 25V BATTERY 2V TO 25V 117/1/2 TA11 INPT VOLTAGE 4.5V TO 2V Backlight CCFL Supply (see AN45 for details) L2*** 1k 1N5818 L1** 3µH A 33pF 3kV LAMP Q1* 1µF TANT E2 E1 LT1172 2µF C6 1 µ F.2µF Q2* B 1N914 1k 1N914 56Ω 5k INTENSITY ADJST * Q1,Q2 = BCP56 OR MPS65/561 COILTRONICS CTX /1/2 TA12 ** *** SMIDA OR COILTRONICS A MODIFICATION WILL ALLOW OPERATION DOWN TO 4.5V. CONSLT FACTORY. 12

13 LT117/LT1171/LT1172 TYPICAL APPLICATIO S Positive Buck Converter C3 2.2µF C5* 1µF D3 LT117 47Ω 1µF r * REQIRED IF INPT LEADS 2" ** PLSE ENGINEERING COILTRONICS k 1.24k 1µF 1N914 L1** 5µH C4 1µF L2 4µH OPTIONAL OTPT FILTER C5 2µF R4 1Ω 5V, 4.5A 1mA MINIMM 117/1/2 TA13 Negative Boost Regulator C4* 47µF 15V L1 5µH LT117 * REQIRED IF INPT LEADS 2" 3.3k.22µF 27k 1.24k C3 1µF 1µF V OT 28V, 1A R O (MINIMM LOAD) 117/1/2 TA14 Driving High Voltage NPN ** * Q1 LT117 * SETS I B (ON) ** SETS I B (OFF) 117/1/2 TA15 13

14 LT117/LT1171/LT1172 TYPICAL APPLICATIO S Forward Converter R4 D3 T1 1 M N L1 25µH 2µF 3.74k V OT 5V, 6A 2V TO 3V LT117 D4 C3 Q1 R6 33Ω C4 R5 1Ω 1.24k 117/1/2 TA16 High Efficiency 5V Buck Converter 33µF 35V C6.2µF C4.1µF MB3p 68Ω LT117 C5.3µF DIODE C3 4.7µF TANT V 1N4148 L1 5µH *.13Ω 1µH 3A 1µF 16V 39µF 16V OPTIONAL OTPT FILTER V OT 5V 3A** MODE LOGIC 22pF <.3V = NORMAL MODE >2.5V = SHTDOWN OPEN = BRST MODE MODE LT1432 V LIM V OT * IS MADE FROM PC BOARD COPPER TRACES. ** MAXIMM CRRENT IS DETERMINED BY THE CHOICE OF LT17 FAMILY. SEE APPLICATION SECTION. 117/1/2 TA17 14

15 LT117/LT1171/LT1172 PACKAGE DESCRIPTIO Dimensions in inches (millimeters) unless otherwise noted. J8 Package 8-Lead CERDIP (Narrow.3, Hermetic) (LTC DWG # ) ( ) FLL LEAD OPTION.3 BSC (.762 BSC) CORNER LEADS OPTION (4 PLCS) ( ) HALF LEAD OPTION.5 (.127) MIN.25 (.635) RAD TYP.45 (1.287) MAX ( ).2 (5.8) MAX.15.6 ( ).8.18 ( ) 15 NOTE: LEAD DIMENSIONS APPLY TO SOLDER DIP/PLATE OR TIN PLATE LEADS ( ) (.36.66).1 (2.54) BSC MIN J

16 LT117/LT1171/LT1172 PACKAGE DESCRIPTIO Dimensions in inches (millimeters) unless otherwise noted. K Package 4-Lead TO-3 Metal Can (LTC DWG # ) ( ) ( ) ( ) ( ).47 TP P.C.D ( ) ( ) DIA 2 PLC ( ) ( ) R ( ) ( ) R K4(TO-3) 198 N8 Package 8-Lead PDIP (Narrow.3) (LTC DWG # ).4* (1.16) MAX ±.15* (6.477 ±.381) ( ) ( ).13 ±.5 (3.32 ±.127).9.15 ( ) ( ).65 (1.651) TYP.1 (2.54) BSC *THESE DIMENSIONS DO NOT INCLDE MOLD FLASH OR PROTRSIONS. MOLD FLASH OR PROTRSIONS SHALL NOT EXCEED.1 INCH (.254mm).125 (3.175) MIN.18 ±.3 (.457 ±.76).2 (.58) MIN N

17 LT117/LT1171/LT1172 PACKAGE DESCRIPTIO Dimensions in inches (millimeters) unless otherwise noted. Q Package 5-Lead Plastic DD Pak (LTC DWG # ).256 (6.52).6 (1.524).6 (1.524) TYP ( ) 15 TYP ( ) ( ).6 (1.524).183 (4.648) ( ).59 (1.499) TYP ( ).3 (7.62).75 (1.95) BOTTOM VIEW OF DD PAK HATCHED AREA IS SOLDER PLATED COPPER HEAT SINK ( ).67 (1.7) BSC ( ) ( ) ( ).5 ±.12 (1.27 ±.35) Q(DD5) 198 S8 Package 8-Lead Plastic Small Outline (Narrow.15) (LTC DWG # ) * ( ) ( ) ** ( ) ( ).1.2 ( ) 45 8 TYP ( ).4.1 ( ).16.5 ( ) * DIMENSION DOES NOT INCLDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED.6" (.152mm) PER SIDE ** DIMENSION DOES NOT INCLDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED.1" (.254mm) PER SIDE ( ) TYP.5 (1.27) BSC SO

18 LT117/LT1171/LT1172 PACKAGE DESCRIPTIO Dimensions in inches (millimeters) unless otherwise noted. SW Package 16-Lead Plastic Small Outline (Wide.3) (LTC DWG # ) * ( ) NOTE ( ) ** ( ) ( ) ( ) ( ) 8 TYP.9.13 ( ).5 (1.27) BSC ( ) TYP NOTE ( ) NOTE: 1. PIN 1 IDENT, NOTCH ON TOP AND CAVITIES ON THE BOTTOM OF PACKAGES ARE THE MANFACTRING OPTIONS. THE PART MAY BE SPPLIED WITH OR WITHOT ANY OF THE OPTIONS * DIMENSION DOES NOT INCLDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED.6" (.152mm) PER SIDE ** DIMENSION DOES NOT INCLDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED.1" (.254mm) PER SIDE.4.12 (.12.35) S16 (WIDE)

19 LT117/LT1171/LT1172 PACKAGE DESCRIPTIO Dimensions in inches (millimeters) unless otherwise noted. T Package 5-Lead Plastic TO-22 (Standard) (LTC DWG # ) ( ) ( ) DIA ( ) ( ) ( ).46.5 ( ) ( ) ( ).62 (15.75) TYP ( ) SEATING PLANE ( ) ( ) ( ) * ( ) BSC.67 (1.7) ( ) ( ) ( ) * MEASRED AT THE SEATING PLANE T5 (TO-22) 399 Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights. 19

20 LT117/LT1171/LT1172 TYPICAL APPLICATIO Positive Current Boosted Buck Converter 28V 47Ω 2W C3.47µF R6 47Ω C6.2µF 1: N C5* 1µF LT117 68Ω.33µF R7 1k C4.1µF 6 4 2pF 7 LM k R4 1.24k N.25 R5 5k 5k 5µF V OT 5V, 1A * REQIRED IF INPT LEADS 2" 117/1/2 TA18 RELATED PARTS PART NMBER DESCRIPTION COMMENTS LT17/LT171/LT172 5A/2.5A/1.25A High Efficiency Switching Regulators 4kHz, to 6V, to 75V LT174/LT A/2A Step-Down Switching Regulators 1kHz, Also for Positive-to-Negative Conversion LT182 1A, High Voltage, High Efficiency Switching Regulator to 75V, to 1V, Telecom LT1268/LT1268B 7.5A, 15kHz Switching Regulators to 3V, to 6V LT1269/LT1271 4A High Efficiency Switching Regulators 1kHz/6kHz, to 3V, to 6V LT127/LT127A 8A and 1A High Efficiency Switching Regulators 6kHz, to 3V, to 6V LT137 5kHz High Efficiency 6A Switching Regulator High Power Boost, Flyback, SEPIC LT1371 5kHz High Efficiency 3A Switching Regulator Good for Boost, Flyback, Inverting, SEPIC LT1372/LT1377 5kHz and 1MHz High Efficiency 1.5A Switching Regulators Directly Regulates ±V OT LT kHz Low Supply Current High Efficiency 1.5A Switching Regulator Low 1mA Quiescent Current LT1374 4A, 5kHz Step-Down Switching Regulator Synchronizable, to 25V LT1375/LT A, 5kHz Step-Down Switching Regulators p to 1.25A Out from an SO-8 LT1425 Isolated Flyback Switching Regulator 6W Output, ±5% Regulation, No Optocoupler Needed LT157 5kHz Monolithic Buck Mode Switching Regulator 1.5A Switch, Good for 5V to 3.3V LT1533 ltralow Noise 1A Switching Regulator Push-Pull, <1µV P-P Output Noise 2 Linear Technology Corporation 163 McCarthy Blvd., Milpitas, CA (48) FAX: (48) TELEX: fe LT/TP K REV E PRINTED IN SA LINEAR TECHNOLOGY CORPORATION 1991

DESCRIPTIO FEATURES APPLICATIO S TYPICAL APPLICATIO. LT1180A/LT1181A Low Power 5V RS232 Dual Driver/Receiver with 0.1µF Capacitors

DESCRIPTIO FEATURES APPLICATIO S TYPICAL APPLICATIO. LT1180A/LT1181A Low Power 5V RS232 Dual Driver/Receiver with 0.1µF Capacitors FEATRES APPLICATIO S ESD Protection over ±kv ses Small Capacitors: kbaud Operation for R L = k, C L = pf kbaud Operation for R L = k, C L = pf Outputs Withstand ±V Without Damage CMOS Comparable Low Power:

More information

OBSOLETE PRODUCT TYPICAL APPLICATIONS. LT A Positive Adjustable Voltage Regulator FEATURES DESCRIPTIO APPLICATIO S

OBSOLETE PRODUCT TYPICAL APPLICATIONS. LT A Positive Adjustable Voltage Regulator FEATURES DESCRIPTIO APPLICATIO S OBSOLETE PRODCT DATA SHEET FOR REFERENCE ONLY Consult www.linear.com for possible alternate source. FEATRES Guaranteed.% Initial Tolerance Guaranteed.% Load Regulation Guaranteed A Output Current % Thermal

More information

DESCRIPTION FEATURES TYPICAL APPLICATION. LT1097 Low Cost, Low Power Precision Op Amp APPLICATIONS

DESCRIPTION FEATURES TYPICAL APPLICATION. LT1097 Low Cost, Low Power Precision Op Amp APPLICATIONS LT97 Low Cost, Low Power Precision Op Amp FEATRES Offset Voltage µv Max Offset Voltage Drift µv/ C Max Bias Current pa Max Offset Current pa Max Bias and Offset Current Drift pa/ C Max Supply Current µa

More information

FEATURES DESCRIPTIO APPLICATIO S. LTC1451 LTC1452/LTC1453 12-Bit Rail-to-Rail Micropower DACs in SO-8 TYPICAL APPLICATIO

FEATURES DESCRIPTIO APPLICATIO S. LTC1451 LTC1452/LTC1453 12-Bit Rail-to-Rail Micropower DACs in SO-8 TYPICAL APPLICATIO 12-Bit Rail-to-Rail Micropower DACs in SO-8 FEATRES 12-Bit Resolution Buffered True Rail-to-Rail Voltage Output 3V Operation (LTC1453), I CC : 250µA Typ 5V Operation (), I CC : 400µA Typ 3V to 5V Operation

More information

LTC1390 8-Channel Analog Multiplexer with Serial Interface U DESCRIPTIO

LTC1390 8-Channel Analog Multiplexer with Serial Interface U DESCRIPTIO FEATRES -Wire Serial Digital Interface Data Retransmission Allows Series Connection with Serial A/D Converters Single V to ±V Supply Operation Analog Inputs May Extend to Supply Rails Low Charge Injection

More information

DESCRIPTIO FEATURES TYPICAL APPLICATIO. LT1364/LT1365 Dual and Quad 70MHz, 1000V/µs Op Amps APPLICATIO S

DESCRIPTIO FEATURES TYPICAL APPLICATIO. LT1364/LT1365 Dual and Quad 70MHz, 1000V/µs Op Amps APPLICATIO S FEATRES 7MHz Gain Bandwidth V/µs Slew Rate 7.mA Maximum Supply Current per Amplifier nity-gain Stable C-Load TM Op Amp Drives All Capacitive Loads 9nV/ Hz Input Noise Voltage.mV Maximum Input Offset Voltage

More information

APPLICATIO S TYPICAL APPLICATIO. LT1636 Over-The-Top Micropower Rail-to-Rail Input and Output Op Amp FEATURES DESCRIPTIO

APPLICATIO S TYPICAL APPLICATIO. LT1636 Over-The-Top Micropower Rail-to-Rail Input and Output Op Amp FEATURES DESCRIPTIO LT636 Over-The-Top Micropower Rail-to-Rail Input and Output Op Amp FEATRES Rail-to-Rail Input and Output Micropower: 5µA I Q, 44V Supply Operating Temperature Range: 4 C to 25 C Over-The-Top : Input Common

More information

APPLICATIO S TYPICAL APPLICATIO. LTC5507 100kHz to 1GHz RF Power Detector FEATURES DESCRIPTIO

APPLICATIO S TYPICAL APPLICATIO. LTC5507 100kHz to 1GHz RF Power Detector FEATURES DESCRIPTIO 00kHz to GHz RF Power Detector FEATRES Temperature Compensated Internal Schottky Diode RF Detector Wide Input Power Range: 34dBm to 4dBm ltra Wide Input Frequency Range: 00kHz to 000MHz Buffered Output

More information

DESCRIPTIO FEATURES TYPICAL APPLICATIO. LT1584/LT1585/LT1587 7A, 4.6A, 3A Low Dropout Fast Response Positive Regulators Adjustable and Fixed

DESCRIPTIO FEATURES TYPICAL APPLICATIO. LT1584/LT1585/LT1587 7A, 4.6A, 3A Low Dropout Fast Response Positive Regulators Adjustable and Fixed 7A, 4.6A, A Low Dropout Fast Response Positive Regulators Adjustable and Fixed FEATRES Fast Transient Response Guaranteed Dropout Voltage at Multiple Currents Load Regulation:.5% Typical Trimmed Current

More information

LTC1515 Series Step-Up/Step-Down Switched Capacitor DC/DC Converters with Reset DESCRIPTION FEATURES APPLICATIONS TYPICAL APPLICATION

LTC1515 Series Step-Up/Step-Down Switched Capacitor DC/DC Converters with Reset DESCRIPTION FEATURES APPLICATIONS TYPICAL APPLICATION LTC Series Step-p/Step-Down Switched Capacitor DC/DC Converters with Reset FEATRES Adjustable/Selectable 3V, 3.3V or V Output Voltages V to V Input Voltage Range p to ma Output Current Only Three External

More information

LT1074/LT1076 Step-Down Switching Regulator

LT1074/LT1076 Step-Down Switching Regulator LT174/LT176 Step-Down Switching Regulator FEATRES 5A On-Board Switch (LT174) 1kHz Switching Frequency Greatly Improved Dynamic Behavior Available in Low Cost 5 and 7-Lead Packages Only 8.5mA Quiescent

More information

Advanced Monolithic Systems

Advanced Monolithic Systems Advanced Monolithic Systems FEATURES Three Terminal Adjustable or Fixed oltages* 1.5, 1.8, 2.5, 2.85, 3.3 and 5. Output Current of 1A Operates Down to 1 Dropout Line Regulation:.2% Max. Load Regulation:.4%

More information

CA723, CA723C. Voltage Regulators Adjustable from 2V to 37V at Output Currents Up to 150mA without External Pass Transistors. Features.

CA723, CA723C. Voltage Regulators Adjustable from 2V to 37V at Output Currents Up to 150mA without External Pass Transistors. Features. CA73, CA73C Data Sheet April 1999 File Number 788. Voltage Regulators Adjustable from V to 37V at Output Currents Up to 1mA without External Pass Transistors The CA73 and CA73C are silicon monolithic integrated

More information

DESCRIPTIO. LT1226 Low Noise Very High Speed Operational Amplifier

DESCRIPTIO. LT1226 Low Noise Very High Speed Operational Amplifier FEATRES Gain of Stable GHz Gain Bandwidth V/µs Slew Rate.6nV/ Hz Input Noise Voltage V/mV Minimum DC Gain, R L = Ω mv Maximum Input Offset Voltage ±V Minimum Output Swing into Ω ide Supply Range ±.V to

More information

FEATURES APPLICATIO S. LTC1150 ±15V Zero-Drift Operational Amplifier with Internal Capacitors DESCRIPTIO TYPICAL APPLICATIO

FEATURES APPLICATIO S. LTC1150 ±15V Zero-Drift Operational Amplifier with Internal Capacitors DESCRIPTIO TYPICAL APPLICATIO FEATRES High Voltage Operation: ±1V No External Components Required Maximum Offset Voltage: 1µV Maximum Offset Voltage Drift:.5µV/ C Low Noise 1.8µV P-P (.1Hz to 1Hz) Minimum Voltage Gain: 15dB Minimum

More information

LTC4555 SIM Power Supply and Level Translator FEATURES DESCRIPTION APPLICATIONS TYPICAL APPLICATION

LTC4555 SIM Power Supply and Level Translator FEATURES DESCRIPTION APPLICATIONS TYPICAL APPLICATION SIM Power Supply and Level Translator FEATURES n SIM Power Supply: 1.8V/3V at 50mA n Input Voltage Range: 3V to 6V n Controller Voltage Range: 1.2V to 4.4V n 14kV ESD On All SIM Contact Pins n Meets All

More information

LT1109A Micropower DC/DC Converter Flash Memory VPP Generator Adjustable and Fixed 5V, 12V DESCRIPTIO

LT1109A Micropower DC/DC Converter Flash Memory VPP Generator Adjustable and Fixed 5V, 12V DESCRIPTIO LT9A Micropower DC/DC Converter Flash Memory VPP Generator Adjustable and Fixed 5V, 2V FEATRE ses ff-the-helf Inductors Low Cost -Pin DIP or Package Fixed 5V or 2V utput or Adjustable Version nly Four

More information

MIC4575. Features. General Description. Applications. Typical Application. 200kHz Simple 1A Buck Regulator

MIC4575. Features. General Description. Applications. Typical Application. 200kHz Simple 1A Buck Regulator 00kHz Simple 1A Buck Regulator General Description The is a series of easy to use fixed and adjustable BiCMOS step-down (buck) switch-mode voltage regulators. The 00kHz duplicates the pinout and function

More information

AP1509. 150KHz, 2A PWM BUCK DC/DC CONVERTER. Description. Pin Assignments V IN. Applications. Features. (Top View) GND GND. Output AP1509 GND GND

AP1509. 150KHz, 2A PWM BUCK DC/DC CONVERTER. Description. Pin Assignments V IN. Applications. Features. (Top View) GND GND. Output AP1509 GND GND Description Pin Assignments The series are monolithic IC designed for a stepdown DC/DC converter, and own the ability of driving a 2A load without additional transistor. It saves board space. The external

More information

TDA4605 CONTROL CIRCUIT FOR SWITCH MODE POWER SUPPLIES USING MOS TRANSISTORS

TDA4605 CONTROL CIRCUIT FOR SWITCH MODE POWER SUPPLIES USING MOS TRANSISTORS CONTROL CIRCUIT FOR SWITCH MODE POWER SUPPLIES USING MOS TRANSISTORS Fold-Back Characteristic provides Overload Protection for External Diodes Burst Operation under Short-Circuit and no Load Conditions

More information

DESCRIPTION TYPICAL APPLICATION. LTC Ultraselective, Low Power 8th Order Elliptic Bandpass Filter with Adjustable Gain FEATURES APPLICATIONS

DESCRIPTION TYPICAL APPLICATION. LTC Ultraselective, Low Power 8th Order Elliptic Bandpass Filter with Adjustable Gain FEATURES APPLICATIONS FOR INFORMATION PRPOSES ONLY OBSOLETE: Contact Linear Technology for Potential Replacement FEATRES ltraselectivity (db Attenuation at ±% of Center Frequency) Adjustable Passband Gain Noise Independent

More information

FEATURES DESCRIPTIO. LT1073 Micropower DC/DC Converter Adjustable and Fixed 5V, 12V APPLICATIO S TYPICAL APPLICATION

FEATURES DESCRIPTIO. LT1073 Micropower DC/DC Converter Adjustable and Fixed 5V, 12V APPLICATIO S TYPICAL APPLICATION FEATRES No Design Required Operates at Supply Voltages from 1V to 30V Consumes Only 95µA Supply Current Works in Step-p or Step-Down Mode Only Three External Off-the-Shelf Components Required Low-Battery

More information

LM1084 5A Low Dropout Positive Regulators

LM1084 5A Low Dropout Positive Regulators 5A Low Dropout Positive Regulators General Description The LM1084 is a series of low dropout voltage positive regulators with a maximum dropout of 1.5 at 5A of load current. It has the same pin-out as

More information

SG3524 REGULATING PULSE WIDTH MODULATORS

SG3524 REGULATING PULSE WIDTH MODULATORS SG3524 REGULATING PULSE WIDTH MODULATORS COMPLETE PWM POWER CONTROL CIR- CUITRY UNCOMMITTED OUTPUTS FOR SINGLE- ENDED OR PUSH PULL APPLICATIONS LOW STANDBY CURRENT 8mA TYPICAL OPERATION UP TO 300KHz 1%

More information

LM2576R. 3.0A, 52kHz, Step-Down Switching Regulator FEATURES. Applications DESCRIPTION TO-220 PKG TO-220V PKG TO-263 PKG ORDERING INFORMATION

LM2576R. 3.0A, 52kHz, Step-Down Switching Regulator FEATURES. Applications DESCRIPTION TO-220 PKG TO-220V PKG TO-263 PKG ORDERING INFORMATION LM2576 FEATURES 3.3, 5.0, 12, 15, and Adjustable Output ersions Adjustable ersion Output oltage Range, 1.23 to 37 +/- 4% AG10Maximum Over Line and Load Conditions Guaranteed 3.0A Output Current Wide Input

More information

DESCRIPTION FEATURES APPLICATIONS TYPICAL APPLICATION. LT1161 Quad Protected High-Side MOSFET Driver

DESCRIPTION FEATURES APPLICATIONS TYPICAL APPLICATION. LT1161 Quad Protected High-Side MOSFET Driver Quad Protected High-Side MOSFET Driver FEATRES Fully Enhances N-Channel MOSFET Switches V to V Power Supply Range Protected from 5V to V Supply Transients Individual Short-Circuit Protection Individual

More information

AP1506. 150KHz, 3A PWM BUCK DC/DC CONVERTER. Pin Assignments. Description. Features. Applications. ( Top View ) 5 SD 4 FB 3 Gnd 2 Output 1 V IN

AP1506. 150KHz, 3A PWM BUCK DC/DC CONVERTER. Pin Assignments. Description. Features. Applications. ( Top View ) 5 SD 4 FB 3 Gnd 2 Output 1 V IN Description Pin Assignments The series are monolithic IC designed for a stepdown DC/DC converter, and own the ability of driving a 3A load without external transistor. Due to reducing the number of external

More information

LTC1255 Dual 24V High-Side MOSFET Driver DESCRIPTIO

LTC1255 Dual 24V High-Side MOSFET Driver DESCRIPTIO LTC1 Dual 24V High-Side MOSFET Driver FEATRES Fully Enhances N-Channel Power MOSFETs 12µA Standby Current Operates at Supply Voltages from 9V to 24V Short Circuit Protection Easily Protected Against Supply

More information

Pulse Width Modulation Amplifiers -PWM/RAMP ILIM/SHDN CURRENT LIMIT PWM. 100pF 28K OUTPUT DRIVERS OSC SHUTDOWN CONTROL

Pulse Width Modulation Amplifiers -PWM/RAMP ILIM/SHDN CURRENT LIMIT PWM. 100pF 28K OUTPUT DRIVERS OSC SHUTDOWN CONTROL Pulse Width Modulation Amplifiers SA SA FEATURE HIGH FREQUENCY SWITCHING khz WIDE SUPPLY RANGE -V A CONTINUOUS TO C CASE PROTECTION CIRCUITS ANALOG OR DIGITAL INPUTS SYNCHRONIZED OR EXTERNAL OSCILLATOR

More information

1.5A Very L.D.O Voltage Regulator LM29150/29151/29152

1.5A Very L.D.O Voltage Regulator LM29150/29151/29152 FEATURES High Current Capability 1.5A Low Dropout Voltage 350mV Low Ground Current Accurate 1% Guaranteed Initial Tolerance Extremely Fast Transient Response Reverse-Battery and "Load Dump" Protection

More information

MP2259 1A, 16V, 1.4MHz Step-Down Converter

MP2259 1A, 16V, 1.4MHz Step-Down Converter MP59 1A, 1V, 1.MHz Step-Down Converter TM The Future of Analog IC Technology DESCRIPTION The MP59 is a monolithic integrated stepdown switch mode converter with an internal power MOSFET. It achieves 1A

More information

LDS8720. 184 WLED Matrix Driver with Boost Converter FEATURES APPLICATION DESCRIPTION TYPICAL APPLICATION CIRCUIT

LDS8720. 184 WLED Matrix Driver with Boost Converter FEATURES APPLICATION DESCRIPTION TYPICAL APPLICATION CIRCUIT 184 WLED Matrix Driver with Boost Converter FEATURES High efficiency boost converter with the input voltage range from 2.7 to 5.5 V No external Schottky Required (Internal synchronous rectifier) 250 mv

More information

LM78XX Series Voltage Regulators

LM78XX Series Voltage Regulators LM78XX Series Voltage Regulators General Description Connection Diagrams The LM78XX series of three terminal regulators is available with several fixed output voltages making them useful in a wide range

More information

LM2704 Micropower Step-up DC/DC Converter with 550mA Peak Current Limit

LM2704 Micropower Step-up DC/DC Converter with 550mA Peak Current Limit Micropower Step-up DC/DC Converter with 550mA Peak Current Limit General Description The LM2704 is a micropower step-up DC/DC in a small 5-lead SOT-23 package. A current limited, fixed off-time control

More information

AS2815. 1.5A Low Dropout Voltage Regulator Adjustable & Fixed Output, Fast Response

AS2815. 1.5A Low Dropout Voltage Regulator Adjustable & Fixed Output, Fast Response 1.5A Low Dropout oltage Regulator Adjustable & Fixed Output, Fast Response FEATURES Adjustable Output Down To 1.2 Fixed Output oltages 1.5, 2.5, 3.3, 5.0 Output Current of 1.5A Low Dropout oltage 1.1 Typ.

More information

NTE923 & NTE923D Integrated Circuit Precision Voltage Regulator

NTE923 & NTE923D Integrated Circuit Precision Voltage Regulator NTE923 & NTE923D Integrated Circuit Precision Voltage Regulator Description: The NTE923 and NTE923D are voltage regulators designed primarily for series regulator applications. By themselves, these devices

More information

FEATURES APPLICATIO S DESCRIPTIO TYPICAL APPLICATIO. LT1074/LT1076 Step-Down Switching Regulator

FEATURES APPLICATIO S DESCRIPTIO TYPICAL APPLICATIO. LT1074/LT1076 Step-Down Switching Regulator FEATRES 5A Onboard Switch (LT74) Operates p to 6V Input khz Switching Frequency Greatly Improved Dynamic Behavior Available in Low Cost 5 and 7-Lead Packages Only 8.5mA Quiescent Current Programmable Current

More information

Last Time Buy. Deadline for receipt of LAST TIME BUY orders: April 30, 2011

Last Time Buy. Deadline for receipt of LAST TIME BUY orders: April 30, 2011 Last Time Buy This part is in production but has been determined to be LAST TIME BUY. This classification indicates that the product is obsolete and notice has been given. Sale of this device is currently

More information

FEATURES APPLICATIO S TYPICAL APPLICATIO. LTC1061 High Performance Triple Universal Filter Building Block DESCRIPTIO

FEATURES APPLICATIO S TYPICAL APPLICATIO. LTC1061 High Performance Triple Universal Filter Building Block DESCRIPTIO FEATRES Three Filters in a Single Package p to th Order Filter Functions Center Frequency Range up to khz f O Q Product up to MHz Guaranteed Center Frequency and Q Accuracy Over Temperature Guaranteed

More information

LM723/LM723C Voltage Regulator

LM723/LM723C Voltage Regulator LM723/LM723C Voltage Regulator General Description The LM723/LM723C is a voltage regulator designed primarily for series regulator applications. By itself, it will supply output currents up to 150 ma;

More information

Programmable Single-/Dual-/Triple- Tone Gong SAE 800

Programmable Single-/Dual-/Triple- Tone Gong SAE 800 Programmable Single-/Dual-/Triple- Tone Gong Preliminary Data SAE 800 Bipolar IC Features Supply voltage range 2.8 V to 18 V Few external components (no electrolytic capacitor) 1 tone, 2 tones, 3 tones

More information

DESCRIPTIO FEATURES FU CTIO AL BLOCK DIAGRA. LTC1655/LTC1655L 16-Bit Rail-to-Rail Micropower DACs in. SO-8 Package APPLICATIO S

DESCRIPTIO FEATURES FU CTIO AL BLOCK DIAGRA. LTC1655/LTC1655L 16-Bit Rail-to-Rail Micropower DACs in. SO-8 Package APPLICATIO S FEATRES 16-Bit Monotonicity Over Temperature Deglitched Rail-to-Rail Voltage Output SO-8 Package I CC(TYP) : 6µA Internal Reference:.48V (LTC1655) 1.5V (LTC1655L) Maximum DNL Error: ±1LSB Settling Time:

More information

TYPICAL APPLICATION LTC7543/LTC8143 LTC7543/LTC Multiplying DAC Has Easy 3-Wire Serial Interface. Integral Nonlinearity over Temperature

TYPICAL APPLICATION LTC7543/LTC8143 LTC7543/LTC Multiplying DAC Has Easy 3-Wire Serial Interface. Integral Nonlinearity over Temperature TYPICAL APPLICATION V IN Multiplying DAC Has Easy -Wire Serial Interface 5V Integral Nonlinearity over Temperature.0 CLOCK DATA LOAD 5 5 6 V DD R FB STB LTC5 LTC8 LD DGND AGND pf + LT 09 V OT 5/8 TA0 INTEGRAL

More information

LM118/LM218/LM318 Operational Amplifiers

LM118/LM218/LM318 Operational Amplifiers LM118/LM218/LM318 Operational Amplifiers General Description The LM118 series are precision high speed operational amplifiers designed for applications requiring wide bandwidth and high slew rate. They

More information

400KHz 60V 4A Switching Current Boost / Buck-Boost / Inverting DC/DC Converter

400KHz 60V 4A Switching Current Boost / Buck-Boost / Inverting DC/DC Converter Features Wide 5V to 32V Input Voltage Range Positive or Negative Output Voltage Programming with a Single Feedback Pin Current Mode Control Provides Excellent Transient Response 1.25V reference adjustable

More information

LT1129/LT1129-3.3/LT1129-5 Micropower Low Dropout Regulators with Shutdown DESCRIPTION FEATURES APPLICATIONS TYPICAL APPLICATION

LT1129/LT1129-3.3/LT1129-5 Micropower Low Dropout Regulators with Shutdown DESCRIPTION FEATURES APPLICATIONS TYPICAL APPLICATION FEATURES n 4m Dropout oltage n 7mA Output Current n 5μA Quiescent Current n No Protection Diodes Needed n Adjustable Output from 3.8 to 3 n 3.3 and 5 Fixed Output oltages n Controlled Quiescent Current

More information

SWITCH-MODE POWER SUPPLY CONTROLLER PULSE OUTPUT DC OUTPUT GROUND EXTERNAL FUNCTION SIMULATION ZERO CROSSING INPUT CONTROL EXTERNAL FUNCTION

SWITCH-MODE POWER SUPPLY CONTROLLER PULSE OUTPUT DC OUTPUT GROUND EXTERNAL FUNCTION SIMULATION ZERO CROSSING INPUT CONTROL EXTERNAL FUNCTION SWITCH-MODE POWER SUPPLY CONTROLLER. LOW START-UP CURRENT. DIRECT CONTROL OF SWITCHING TRAN- SISTOR. COLLECTOR CURRENT PROPORTIONAL TO BASE-CURRENT INPUT REERSE-GOING LINEAR OERLOAD CHARACTERISTIC CURE

More information

High Common-Mode Rejection. Differential Line Receiver SSM2141. Fax: 781/461-3113 FUNCTIONAL BLOCK DIAGRAM FEATURES. High Common-Mode Rejection

High Common-Mode Rejection. Differential Line Receiver SSM2141. Fax: 781/461-3113 FUNCTIONAL BLOCK DIAGRAM FEATURES. High Common-Mode Rejection a FEATURES High Common-Mode Rejection DC: 00 db typ 60 Hz: 00 db typ 20 khz: 70 db typ 40 khz: 62 db typ Low Distortion: 0.00% typ Fast Slew Rate: 9.5 V/ s typ Wide Bandwidth: 3 MHz typ Low Cost Complements

More information

PAM2804. Pin Assignments. Description. Applications. Features. Typical Applications Circuit 1A STEP-DOWN CONSTANT CURRENT, HIGH EFFICIENCY LED DRIVER

PAM2804. Pin Assignments. Description. Applications. Features. Typical Applications Circuit 1A STEP-DOWN CONSTANT CURRENT, HIGH EFFICIENCY LED DRIVER 1A STEP-DOWN CONSTANT CURRENT, HIGH EFFICIENCY LED DRIER Description Pin Assignments The is a step-down constant current LED driver. When the input voltage is down to lower than LED forward voltage, then

More information

Series AMLDL-Z Up to 1000mA LED Driver

Series AMLDL-Z Up to 1000mA LED Driver FEATURES: Click on Series name for product info on aimtec.com Series Up to ma LED Driver Models Single output Model Input Voltage (V) Step Down DC/DC LED driver Operating Temperature range 4ºC to 85ºC

More information

LM386 Low Voltage Audio Power Amplifier

LM386 Low Voltage Audio Power Amplifier Low Voltage Audio Power Amplifier General Description The LM386 is a power amplifier designed for use in low voltage consumer applications. The gain is internally set to 20 to keep external part count

More information

LM138 LM338 5-Amp Adjustable Regulators

LM138 LM338 5-Amp Adjustable Regulators LM138 LM338 5-Amp Adjustable Regulators General Description The LM138 series of adjustable 3-terminal positive voltage regulators is capable of supplying in excess of 5A over a 1 2V to 32V output range

More information

LM139/LM239/LM339/LM2901/LM3302 Low Power Low Offset Voltage Quad Comparators

LM139/LM239/LM339/LM2901/LM3302 Low Power Low Offset Voltage Quad Comparators Low Power Low Offset Voltage Quad Comparators General Description The LM139 series consists of four independent precision voltage comparators with an offset voltage specification as low as 2 mv max for

More information

LM117 LM317A LM317 3-Terminal Adjustable Regulator

LM117 LM317A LM317 3-Terminal Adjustable Regulator LM117 LM317A LM317 3-Terminal Adjustable Regulator General Description The LM117 series of adjustable 3-terminal positive voltage regulators is capable of supplying in excess of 1 5A over a 1 2V to 37V

More information

LX7186A. 1.4MHz, 1A Synchronous Buck Converter. Features. Description. Applications LX7186A

LX7186A. 1.4MHz, 1A Synchronous Buck Converter. Features. Description. Applications LX7186A 1.4MHz, 1A Synchronous Buck Converter Description The LX7186A is 1.4MHz fixed frequency, currentmode, synchronous PWM buck (step-down) DC-DC converter, capable of driving a 1A load with high efficiency,

More information

.OPERATING SUPPLY VOLTAGE UP TO 46 V

.OPERATING SUPPLY VOLTAGE UP TO 46 V L298 DUAL FULL-BRIDGE DRIVER.OPERATING SUPPLY VOLTAGE UP TO 46 V TOTAL DC CURRENT UP TO 4 A. LOW SATURATION VOLTAGE OVERTEMPERATURE PROTECTION LOGICAL "0" INPUT VOLTAGE UP TO 1.5 V (HIGH NOISE IMMUNITY)

More information

SG2525A SG3525A REGULATING PULSE WIDTH MODULATORS

SG2525A SG3525A REGULATING PULSE WIDTH MODULATORS SG2525A SG3525A REGULATING PULSE WIDTH MODULATORS 8 TO 35 V OPERATION 5.1 V REFERENCE TRIMMED TO ± 1 % 100 Hz TO 500 KHz OSCILLATOR RANGE SEPARATE OSCILLATOR SYNC TERMINAL ADJUSTABLE DEADTIME CONTROL INTERNAL

More information

Precision, Unity-Gain Differential Amplifier AMP03

Precision, Unity-Gain Differential Amplifier AMP03 a FEATURES High CMRR: db Typ Low Nonlinearity:.% Max Low Distortion:.% Typ Wide Bandwidth: MHz Typ Fast Slew Rate: 9.5 V/ s Typ Fast Settling (.%): s Typ Low Cost APPLICATIONS Summing Amplifiers Instrumentation

More information

LTC1443/LTC1444/LTC1445 Ultralow Power Quad Comparators with Reference. Features. Description. Applications. Typical Application

LTC1443/LTC1444/LTC1445 Ultralow Power Quad Comparators with Reference. Features. Description. Applications. Typical Application LTC/LTC/LTC Ultralow Power Quad Comparators with Reference Features n Ultralow Quiescent Current:.µA Max n Reference Output Drives.µF Capacitor n Adjustable Hysteresis (LTC/LTC) n Wide Supply Range Single:

More information

EN1 LT1312 DESCRIPTION FEATURES APPLICATIONS TYPICAL APPLICATION. Single PCMCIA VPP Driver/Regulator OBSOLETE:

EN1 LT1312 DESCRIPTION FEATURES APPLICATIONS TYPICAL APPLICATION. Single PCMCIA VPP Driver/Regulator OBSOLETE: FOR INFORMATION PURPOSES ONLY OBSOLETE: Contact Linear Technology for Potential Replacement FEATURES Digital Selection of V, V CC, 12V or Hi-Z 12mA Output Current Capability Internal Current Limiting and

More information

Datasheet. 2A 380KHZ 20V PWM Buck DC/DC Converter. Features

Datasheet. 2A 380KHZ 20V PWM Buck DC/DC Converter. Features General Description Features The is a 380 KHz fixed frequency monolithic step down switch mode regulator with a built in internal Power MOSFET. It achieves 2A continuous output current over a wide input

More information

LTC1658 14-Bit Rail-to-Rail Micropower DAC in MSOP DESCRIPTION FEATURES APPLICATIONS TYPICAL APPLICATION

LTC1658 14-Bit Rail-to-Rail Micropower DAC in MSOP DESCRIPTION FEATURES APPLICATIONS TYPICAL APPLICATION -Bit Rail-to-Rail Micropower DAC in MSOP FEATRES -Bit Resolution 8-Lead MSOP Package Buffered True Rail-to-Rail Voltage Output V or V Single Supply Operation Very Low Power: I CC(TYP) = 7µA Power-On Reset

More information

AAT4280 Slew Rate Controlled Load Switch

AAT4280 Slew Rate Controlled Load Switch General Description Features SmartSwitch The AAT4280 SmartSwitch is a P-channel MOSFET power switch designed for high-side load switching applications. The P-channel MOSFET device has a typical R DS(ON)

More information

DESCRIPTIO TYPICAL APPLICATIO. LT1185 Low Dropout Regulator FEATURES. ±1% Reference Voltage

DESCRIPTIO TYPICAL APPLICATIO. LT1185 Low Dropout Regulator FEATURES. ±1% Reference Voltage Low Dropout Regulator FEATURES Low Resistance Pass Transistor:.25Ω Dropout Voltage:.75V at 3A ±1% Reference Voltage Accurate Programmable Current Limit Shutdown Capability Internal Reference Available

More information

C1 LT1611 APPLICATIO S TYPICAL APPLICATIO. Inverting 1.4MHz Switching Regulator in SOT-23 DESCRIPTIO

C1 LT1611 APPLICATIO S TYPICAL APPLICATIO. Inverting 1.4MHz Switching Regulator in SOT-23 DESCRIPTIO Inverting 1.4MHz Switching Regulator in SOT-23 FEATRES Very Low Noise: 1mV P P Output Ripple 5V at 150mA from a 5V Input Better Regulation Than a Charge Pump Effective Output Impedance: 0.14Ω ses Tiny

More information

MC34063A, MC33063A, NCV33063A. 1.5 A, Step Up/Down/ Inverting Switching Regulators

MC34063A, MC33063A, NCV33063A. 1.5 A, Step Up/Down/ Inverting Switching Regulators MC3403A, MC3303A, NCV3303A. A, StepUp/Down/ Inverting Switching Regulators The MC3403A Series is a monolithic control circuit containing the primary functions required for DCtoDC converters. These devices

More information

This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice.

This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice. TDA2050 32W Hi-Fi AUDIO POWER AMPLIFIER HIGH OUTPUT POWER (50W MUSIC POWER IEC 268.3 RULES) HIGH OPERATING SUPPLY VOLTAGE (50V) SINGLE OR SPLIT SUPPLY OPERATIONS VERY LOW DISTORTION SHORT CIRCUIT PROTECTION

More information

ZXLD383 SINGLE OR MULTI CELL LED DRIVER SOLUTION

ZXLD383 SINGLE OR MULTI CELL LED DRIVER SOLUTION Summary A Product Line of SINGLE OR MULTI CELL LED DRIVER SOLUTION The is a single or multi cell LED driver designed for applications requiring step-up voltage conversion from a very low input voltage.

More information

DATA SHEET. TDA8560Q 2 40 W/2 Ω stereo BTL car radio power amplifier with diagnostic facility INTEGRATED CIRCUITS. 1996 Jan 08

DATA SHEET. TDA8560Q 2 40 W/2 Ω stereo BTL car radio power amplifier with diagnostic facility INTEGRATED CIRCUITS. 1996 Jan 08 INTEGRATED CIRCUITS DATA SHEET power amplifier with diagnostic facility Supersedes data of March 1994 File under Integrated Circuits, IC01 1996 Jan 08 FEATURES Requires very few external components High

More information

TS321 Low Power Single Operational Amplifier

TS321 Low Power Single Operational Amplifier SOT-25 Pin Definition: 1. Input + 2. Ground 3. Input - 4. Output 5. Vcc General Description The TS321 brings performance and economy to low power systems. With high unity gain frequency and a guaranteed

More information

LM79XX Series 3-Terminal Negative Regulators

LM79XX Series 3-Terminal Negative Regulators LM79XX Series 3-Terminal Negative Regulators General Description The LM79XX series of 3-terminal regulators is available with fixed output voltages of b5v b8v b12v and b15v These devices need only one

More information

Over Current Protection IC With Shunt Regulator

Over Current Protection IC With Shunt Regulator Over Current Protection IC With Shunt Regulator FP133 General Description FP133 is a main rail current detection and over current protection IC. It includes a current shunt comparator and shutdown comparator

More information

LTC1152 Rail-to-Rail Input Rail-to-Rail Output Zero-Drift Op Amp DESCRIPTIO

LTC1152 Rail-to-Rail Input Rail-to-Rail Output Zero-Drift Op Amp DESCRIPTIO LTC5 Rail-to-Rail Input Rail-to-Rail Output Zero-Drift Op Amp FEATRES Input Common-Mode Range Includes Both Rails Output Swings Rail to Rail Output Will Drive kω Load No External Components Required Input

More information

TL783C, TL783Y HIGH-VOLTAGE ADJUSTABLE REGULATOR

TL783C, TL783Y HIGH-VOLTAGE ADJUSTABLE REGULATOR HIGH-VOLTAGE USTABLE REGULATOR SLVS36C SEPTEMBER 1981 REVISED APRIL 1997 Output Adjustable From 1.25 V to 125 V When Used With an External Resistor Divider 7-mA Output Current Full Short-Circuit, Safe-Operating-Area,

More information

SP724. TVS Diode Arrays

SP724. TVS Diode Arrays The is a quad array of transient voltage clamping circuits designed to suppress ESD and other transient over-voltage events. The is used to help protect sensitive digital or analog input circuits on data,

More information

TYPICAL APPLICATION CIRCUIT. ORDER INFORMATION SOP-EP 8 pin A703EFT (Lead Free) A703EGT (Green)

TYPICAL APPLICATION CIRCUIT. ORDER INFORMATION SOP-EP 8 pin A703EFT (Lead Free) A703EGT (Green) www.addmtek.com 2 CHANNELS 150mA HIGH VOLTAGE ADJUSTABLE CURRENT REGULATOR DESCRIPTION A703 is a high voltage, adjustable constant current driver for LED applications. Two regulated current ports are designed

More information

LTC3026 1.5A Low Input Voltage VLDO Linear Regulator. Description. Features. Applications. Typical Application

LTC3026 1.5A Low Input Voltage VLDO Linear Regulator. Description. Features. Applications. Typical Application Features n Input Voltage Range: 1.14V to 3.5V (with Boost Enabled) 1.14V to 5.5V (with External 5V Boost) n Low Dropout Voltage: 1mV at I = 1.5A n Adjustable Output Range:.4V to 2.6V n Output Current:

More information

An9931. An9931 Unity Power Factor LED Lamp Driver

An9931. An9931 Unity Power Factor LED Lamp Driver An9931 Unity Power Factor LED Lamp Driver Features Constant output current Large step-down ratio Unity power factor Low input current harmonic distortion Fixed frequency or fixed off-time operation Internal

More information

MC34063A MC34063E DC-DC CONVERTER CONTROL CIRCUITS

MC34063A MC34063E DC-DC CONVERTER CONTROL CIRCUITS MC34063A MC34063E DC-DC CONVERTER CONTROL CIRCUITS OUTPUT SWITCH CURRENT IN EXCESS OF 1.5A 2% REFERENCE ACCURACY LOW QUIESCENT CURRENT: 2.5mA (TYP.) OPERATING FROM 3V TO 40V FREQUENCY OPERATION TO 100KHz

More information

Discontinued Product

Discontinued Product Discontinued Product This device is no longer in production. The device should not be purchased for new design applications. Samples are no longer available. Date of status change: November, 00 Recommended

More information

High Speed, Low Power Dual Op Amp AD827

High Speed, Low Power Dual Op Amp AD827 a FEATURES High Speed 50 MHz Unity Gain Stable Operation 300 V/ms Slew Rate 120 ns Settling Time Drives Unlimited Capacitive Loads Excellent Video Performance 0.04% Differential Gain @ 4.4 MHz 0.198 Differential

More information

www.jameco.com 1-800-831-4242

www.jameco.com 1-800-831-4242 Distributed by: www.jameco.com 1-800-831-4242 The content and copyrights of the attached material are the property of its owner. LF411 Low Offset, Low Drift JFET Input Operational Amplifier General Description

More information

Supertex inc. MD1820. High Speed, Four Channel MOSFET Driver with Non-Inverting Outputs. Features

Supertex inc. MD1820. High Speed, Four Channel MOSFET Driver with Non-Inverting Outputs. Features inc. High Speed, Four Channel MOSFET Driver with Non-Inverting Outputs Features Non-inverting, four channel MOSFET driver.0ns rise and fall time 2.0A peak output source/sink current 1. to 5.0V input CMOS

More information

CAT4101TV. 1 A Constant-Current LED Driver with PWM Dimming

CAT4101TV. 1 A Constant-Current LED Driver with PWM Dimming A Constant-Current LED Driver with PWM Dimming Description The CAT4 is a constant current sink driving a string of high brightness LEDs up to A with very low dropout of.5 V at full load. It requires no

More information

PAM2841. Description. Pin Assignments. Features. Applications. Typical Applications Circuit. A Product Line of. Diodes Incorporated

PAM2841. Description. Pin Assignments. Features. Applications. Typical Applications Circuit. A Product Line of. Diodes Incorporated 1.5A SW CURRENT, 40V PRECISION WLED DRIVER Description Pin Assignments The is a white LED driver, capable of driving 10 or more WLEDs in series (depending on forward voltage of the LEDs) with a range of

More information

28V, 2A Buck Constant Current Switching Regulator for White LED

28V, 2A Buck Constant Current Switching Regulator for White LED 28V, 2A Buck Constant Current Switching Regulator for White LED FP7102 General Description The FP7102 is a PWM control buck converter designed to provide a simple, high efficiency solution for driving

More information

MP2365 3A, 28V, 1.4MHz Step-Down Converter

MP2365 3A, 28V, 1.4MHz Step-Down Converter The Future of Analog IC Technology MP365 3A, 8,.MHz Step-Down Converter DESCRIPTION The MP365 is a.mhz step-down regulator with a built-in Power MOSFET. It achieves 3A continuous output current over a

More information

1.5MHz, 900mA Synchronous Step-Down Converter

1.5MHz, 900mA Synchronous Step-Down Converter 1.5MHz, 900mA Synchronous Step-Down Converter FEATURES High Efficiency - Up to 95% Guaranteed 900mA Output Current 2.5V to 5.5V Input Voltage Range 1.5MHz Constant Frequency Operation No external Schottky

More information

5800 AND 5801. BiMOS II LATCHED DRIVERS UCN5800L UCN5800A

5800 AND 5801. BiMOS II LATCHED DRIVERS UCN5800L UCN5800A 800 AND 80 Data Sheet 2680.0B* CLEAR IN IN 2 IN 3 IN GROUND 2 3 6 UCN800L UCN800A LATCHES V DD 3 2 0 9 7 8 OUTPUT ENABLE SUPPLY OUT COMMON Dwg. PP-0A The UCN800A/L and UCN80A/EP/LW latched-input BiMOS

More information

DUAL FULL-BRIDGE PWM MOTOR DRIVER

DUAL FULL-BRIDGE PWM MOTOR DRIVER 9 Data Sheet 99.0F PWM OUT A OUT A E SENSE OUT B UDN9B (DP) 0 9 LOAD SUPPLY E SENSE OUT B The UDN9B, UDN9EB, and UDN9LB motor drivers are designed to drive both windings of a bipolar stepper motor or bidirectionally

More information

UNISONIC TECHNOLOGIES CO., LTD

UNISONIC TECHNOLOGIES CO., LTD UPS61 UNISONIC TECHNOLOGIES CO., LTD HIGH PERFORMANCE CURRENT MODE POWER SWITCH DESCRIPTION The UTC UPS61 is designed to provide several special enhancements to satisfy the needs, for example, Power-Saving

More information

FEATURES DESCRIPTIO APPLICATIO S. LT1618 Constant-Current/ Constant-Voltage 1.4MHz Step-Up DC/DC Converter TYPICAL APPLICATIO

FEATURES DESCRIPTIO APPLICATIO S. LT1618 Constant-Current/ Constant-Voltage 1.4MHz Step-Up DC/DC Converter TYPICAL APPLICATIO LT68 Constant-Current/ Constant-Voltage.MHz Step-p DC/DC Converter FEATRES Accurate Input/Output Current Control: ±5% Over Temperature Accurate Output Voltage Control: ±% Wide Range:.6V to 8V.MHz Switching

More information

LM148/LM248/LM348 Quad 741 Op Amps

LM148/LM248/LM348 Quad 741 Op Amps Quad 741 Op Amps General Description The LM148 series is a true quad 741. It consists of four independent, high gain, internally compensated, low power operational amplifiers which have been designed to

More information

WHITE LED STEP-UP CONVERTER. Features

WHITE LED STEP-UP CONVERTER. Features General Description The is an inductor-based DC/DC converter designed to drive up to eight white LEDs in series for backlight. Only one feedback resistor is needed to control the LED current and obtain

More information

APPLICATIO S BLOCK DIAGRA TYPICAL APPLICATIO. LT1025 Micropower Thermocouple Cold Junction Compensator FEATURES DESCRIPTIO

APPLICATIO S BLOCK DIAGRA TYPICAL APPLICATIO. LT1025 Micropower Thermocouple Cold Junction Compensator FEATURES DESCRIPTIO Micropower Thermocouple Cold Junction Compensator FEATRES 8µA Supply Current V to 36V Operation.5 C Initial Accuracy (A Version) Compatible with Standard Thermocouples (E, J, K, R, S, T) Auxiliary Output

More information

TDA2040. 20W Hi-Fi AUDIO POWER AMPLIFIER

TDA2040. 20W Hi-Fi AUDIO POWER AMPLIFIER 20W Hi-Fi AUDIO POWER AMPLIFIER DESCRIPTION The TDA2040 is a monolithic integrated circuit in Pentawatt package, intended for use as an audio class AB amplifier. Typically it provides 22W output power

More information

Minimize Standby Current in Automotive DDR Supplies David Gilbert

Minimize Standby Current in Automotive DDR Supplies David Gilbert July 13 Volume 23 Number 2 I N T H I S I S S U E straighten out your power source priorities 8 µmodule DC/DC combines high efficiency switching with low noise linear regulation 18 reference clock distribution

More information

MP2456 0.5A, 50V, 1.2MHz Step-Down Converter in a TSOT23-6

MP2456 0.5A, 50V, 1.2MHz Step-Down Converter in a TSOT23-6 MP2456 0.5A, 50V, 1.2MHz Step-Down Converter in a TSOT23-6 DESCRIPTION The MP2456 is a monolithic, step-down, switchmode converter with a built-in power MOSFET. It achieves a 0.5A peak-output current over

More information

Micropower, Step-Up/Step-Down SW Regulator; Adjustable and Fixed 3.3 V, 5 V, 12 V ADP1111

Micropower, Step-Up/Step-Down SW Regulator; Adjustable and Fixed 3.3 V, 5 V, 12 V ADP1111 a FEATURES Operates from 2 V to 30 V Input Voltage Range 72 khz Frequency Operation Utilizes Surface Mount Inductors Very Few External Components Required Operates in Step-Up/Step-Down or Inverting Mode

More information

CLASS-D VERTICAL DEFLECTION AMPLIFIER FOR TV AND MONITOR APPLICATION OUT CFLY + CFLY - BOOT VREG FEEDCAP FREQ. July 2001 1/8

CLASS-D VERTICAL DEFLECTION AMPLIFIER FOR TV AND MONITOR APPLICATION OUT CFLY + CFLY - BOOT VREG FEEDCAP FREQ. July 2001 1/8 CLASS-D VERTICAL DEFLECTION AMPLIFIER FOR TV AND MONITOR APPLICATION FEATURES PRELIMINARY DATA HIGH EFFICIENCY POWER AMPLIFIER NO HEATSINK SPLIT SUPPLY INTERNAL FLYBACK GENERATOR OUTPUT CURRENT UP TO.5

More information