5 V fixed micro-power low dropout linear voltage regulator XC06 HV

Transcription

1 5 V fixed micro-power low dropout linear voltage regulator XC06 HV DATA SHEET FEATURES FUNCTIONAL BLOCK DIAGRAM Fixed output voltage: 5 V Input voltage range: up to 40 V Maximum output current: 10 mа Power-supply voltage comparator ESD-protection No forward diode for VIN < VOUT HIGHLIGHTS Output current limit adjustment range: 50 ua..10 ma, via external resistor Low dropout voltage Low quiescent current Sleep mode APPLICATIONS Fire and security alarm detectors Battery powered system Single and periodic mode operation equipment Portable equipment DELIVERABLES Datasheet GDSII database Customer support GENERAL DESCRIPTION is a micro-power low dropout linear voltage regulator of XC06 HV technology. The linear regulator has a fixed 5 V output voltage with an input voltage up to 40 V. The regulator is additionally configured with CR, COMP and SLEEP functions. CR function is included for an external resistor connection, that allows maximum output current to be limited to 50 ua..10 ma. The linear regulator maintains stable clamping current within the entire temperature and input-output voltage range, thus enabling the microchip to be used in circuits with quiescent current control. SLEEP function is meant for switching the regulator into a quiescent current limit mode. In this mode all the inner regulator circuits are switched off excluding the voltage VOUT control circuit. On-load power is supplied via charge stored in output capacitor. The output voltage is decreasing 1/9 info@

2 until the SLEEP function is off or the voltage VOUT (~2.7 V) control circuit is actuated. Therefore, the SLEEP function is possible to be controlled via an integrated circuit, fed by the linear regulator. This operating mode enables the quiescent current to be as low as a few microamperes. COMP function is meant for controlling voltage drop VIN to VOUT V. If VIN < VOUT, the regulator switches to the SLEEP mode. In this case, the diode forward potential between «OUT» and «IN» pins is not generated. COMP outlet may be used for receiving data transferred through power supply circuits. Available protection short circuit protection; output overvoltage protection for output voltage > (VOUT V); output overcurrent (quiescent current limit ILIM); thermal protection (when temperature exceeds С, thermal protection security activates and switches the regulator into the SLEEP mode); built-in ESD protection. 2/9 info@

3 LIST OF CONTENTS Features 1 Functional block diagram 1 Highlights 1 Applications 1 Deliverables 1 General description 1 Device parameters 4 Absolute maximum ratings 6 Pin configuration 6 Pin functional description 6 Device operation 7 Esd-protection 7 Operating voltages 7 Application circuits 8 Timing 9 3/9 info@

4 DEVICE PARAMETERS VIN = V; ILIM = ma; IOUT = ILIM; COUT = 3.3 uf; T = С, unless otherwise noted. Symbol Parameter Min Typ Max Unit VOUT Output voltage V VOUT/ VIN Output voltage instability to input voltage mv/v VOUT/ IL Output voltage instability to load output current VIN = 15 V mv/ma VIN MAX Maximum input voltage 40 V VOUT/ T Output voltage temperature coefficient 0.5 mv/ 0 С IGND VIN = 15 V Iq=IGND+ICR Quiescent current ICR ILIM = 0.05 ma 0.25 ILIM = 10 ma 50 ua ILIM Output clamping current adjustment ma ILIM Сlamping current adjustment accuracy 1 ILIM= mA ±12 ILIM=1..5mA ±16 ILIM=5..10mA ±20 % ILIM/ T Clamping current temperature instability ILIM= mA 0.05 ILIM=1..5mA 0.1 ILIM=5..10mA 0.2 %/ 0 С ILIM/ VIN Clamping current instability to input voltage 0.5 %/ 0 V VIN-VOUT Input to output minimum voltage dropout ILIM = 10 ma, IOUT = 5 ma V VC 1->0; VC 0->1 Comparator switching threshold VC 0->1 VC 1-> V tc 1->0; tc 0->1 Comparator transition time tc 1->0 12 tc 0->1 2.5 us VC «SLEEP» input switching threshold 1 V 4/9 info@

5 DEVICE PARAMETERS (continued) Symbol Parameter Min Typ Max Unit VSL «SLEEP» input low voltage level V VSH «SLEEP» input high voltage level V IS «SLEEP» input current ua VST 0->1; VST 1->0 «START-UP» comparator switching threshold VST 0-> VST 1-> V IqS ISC IOP SLEEP mode quiescent current 3 Short circuit supply current 4 Output overvoltage protection current VIN = 15 V; T = 27 0 С; ILIM = 10 ma; VOUT 4 V VIN = 15 V -> 0V; T = 27 0 С; ILIM = 10 ma; VOUT 4 V T = 27 0 С; IN 1.5 OUT 6.5 IN 1 OUT 6 ua ua ILIM = VOUT ma TTS Thermal shutdown die temperature С TTS Thermal shutdown hysteresis 5 0 С Output noise voltage T = 27 0 С; F = khz COUT=10uF 700 uv(rms) Notes: All the typical device parameters are guaranteed under 50 measurements performed in ceramicmetal packaging. The maximum and minimum values include the results of both measurements and simulations considering possible process deviations within the full temperature range. 1 Clamping current is determined by the output voltage drop by 10 %. 2 «SLEEP» input has an internal current supply that drives its potential to the ground when it is disconnected. 3 In SLEEP mode the regulator is fed via the input voltage and an output capacitor. 4 In case of input short circuit, the regulator is powered from the output capacitor only. 5/9 info@

6 ABSOLUTE MAXIMUM RATINGS Terminal voltages: Temperature range: CR V Storage temperature range С SLEEP V Operating temperature range С IN V COMP V OUT V These are stress ratings only, and functional operation of at these or any other conditions beyond specified isn't implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability of the device. PIN CONFIGURATION GND IN COMP CR SLEEP OUT KEY Figure 1. Pin configuration PIN FUNCTIONAL DESCRIPTION Pin name Description Comments GND Ground COMP Comparator output SLEEP Sleep mode switching input Active level - high IN Regulator input CR External resistor lead for current limit adjustment OUT Regulator output 6/9 info@

7 DEVICE OPERATION includes two internal bandgap voltage references: REF2.5V FROM GND having positive polarity with respect to GND stabilization and REF2.5V FROM VOUT having negative polarity with respect to VOUT stabilization. Differential voltage from references is increased by an error amplifier ERR AMPL and is sent to an OUT BUF unit with less than a unity voltage gain and high current gain. START UP unit is meant for initial start-up of the linear regulator. START UP unit turns on or off, if the output voltage is 3.7 V or 2.7 V respectively. Voltage of 3.7 V is sufficient for operation of the units using VOUT as supply voltage. COMP1 unit is a comparator that compares the difference between input and output voltage. If VIN < VOUT the comparator COMP1 via BULK CONTROL changes over an adjusting transistor substrate in the OUT BUF unit, that prevents a forward diode potential (between «OUT» and «IN» ) generation. In the SLEEP mode VOUT CONT unit prevents the VOUT drop below 2.7 V. If VIN is lower than (1.7 V) the comparator COMP2 generates a logical zero. VOUT MAX CONTROL unit is an output overvoltage protection. All the linear regulator units are controlled by means of the TOTAL CONTROL unit output signals. ESD-PROTECTION All MOS devices are often exposed to electrostatic discharge (ESD). The voltage regulator is equipped with built-in ESD protection: 8000 V on «IN» input; 2000 V (Human Body Model), 200 V (Machine Model) on the rest pins. OPERATING VOLTAGES «SLEEP» input is digital. It may control TTL and CMOS logic signals. A low logic level of not more than 0.3 V and a high logic level of not less than 2 V are recommended. Maximum «SLEEP» voltage shouldn t exceed 16 V. A current generator of about 0.03 ua drives the disconnected input to the «GND». If the SLEEP function is switched off, the «SLEEP» input should be connected to the «GND». SLEEP mode is initialized by feeding a pulse to the «SLEEP». A resistor connected between «CR» and «GND» provides adjustment of output clamping current via the «CR». If «CR» is connected to «GND» the current is maximum. An additional resistor, paralleled to the main one, may be used. There must be a possibility of its commutation while device operation. The linear regulator can't operate with the disconnected «CR» input. An external resistor should be placed as close as possible to the IC pinouts. The «COMP» output is a digital output with CMOS logic levels, noninverting to input «IN», with switching level that is equal to (VOUT V) towards «IN». 7/9 info@

8 APPLICATION CIRCUITS Figure 2. Simplified application circuit Figure 3. Connection circuit without SLEEP mode using Figure 4. Connection circuit with SLEEP mode using Figure 5. Connection circuit for high load current applications 8/9

9 TIMING Figure 6. Timing diagram of connection circuit without SLEEP mode using Figure 7. Timing diagram of connection circuit with SLEEP mode using 9/9