5-V Low Drop Voltage Regulator TLE 4263

Transcription

1 5- Low Drop oltage Regulator TLE 4263 Features Output voltage tolerance ±2% 2 ma output current capability Low-drop voltage ery low standby current consumption Overtemperature protection Reverse polarity protection Short-circuit proof Adjustable reset threshold Watchdog Wide temperature range Suitable for use in automotive electronics Green Product (RoHS compliant) AEC Qualified ^ P-DSO-14-3, -8, -9, -11, 14 Functional Description P-DSO-2-1, -6, -7, -9, -14, -15, -17, - TLE 4263 is a 5- low drop voltage regulator in a SMD package PG-DSO-14, PG-DSO-2, or PG-DSO-8. The maximum input voltage is 45. The maximum output current is more than 2 ma. The IC is short-circuit proof and incorporates temperature protection which turns off the IC at overtemperature. The IC regulates an input voltage I in the range of 6 < P/PG-DSO-8-3, -6, -7, -8, -9, I < 45 to Q,nom = 5.. A reset signal is generated for an output voltage of Q,rt < 4.5. This voltage threshold can be decreased to 3.5 by external connection of a voltage divider. The reset delay can be set externally by a capacitor. The integrated watchdog logic supervises the connected microcontroller. The IC can be switched off via the inhibit input, which causes the current consumption to drop from 9 μa to typical μa. Type Package Type Package TLE 4263 GS PG-DSO-8 TLE 4263 GM PG-DSO-14 TLE 4263 G PG-DSO-2 Data Sheet 1 Rev. 2.9,

2 Choosing External Components The input capacitor C I is necessary for compensation of line influences. Using a resistor of approx. 1 Ω in series with C I, the oscillating circuit consisting of input inductivity and input capacitance can be damped. The output capacitor is necessary for the stability of the regulating circuit. Stability is guaranteed at values 22 μf and an ESR of 3 Ω within the operating temperature range. For small tolerances of the reset delay the spread of the capacitance of the delay capacitor and its temperature coefficient should be noted. TLE 4263 G TLE 4263 GM TLE 4263 GS N.C. N.C. RO N.C. D RADJ INH N.C. I N.C. Q W RO N.C. D RADJ AEP367 INH I Q W I 1 8 INH 2 7 RO AEP1668_4263 Q W RADJ D AEP199_4263 Figure 1 Pin Configuration (top view) Data Sheet 2 Rev. 2.9,

3 Table 1 Pin Definitions and Functions Pin Pin Pin Symbol Function PG-DSO-14 PG-DSO-2 PG-DSO RO Reset output; open-collector output connected to the output via a resistor of 3 kω. 2 1, 2, 19, 13 N.C. Not connected 3-5, , Ground D Reset delay; connected to ground with a capacitor RADJ Reset threshold; to adjust the switching threshold connect a voltage divider (output to ) to the pin. If this input is connected to, reset is triggered at an output voltage of W Watchdog; rising edge triggered input for monitoring a microcontroller Q 5- output voltage; block to ground with a capacitor, C 22 μf, ESR 3 Ω at 1 khz I Input voltage; block to ground directly at the IC with a ceramic capacitor INH Inhibit; TTL-compatible, low-active input. Data Sheet 3 Rev. 2.9,

4 Circuit Description The control amplifier compares a reference voltage, which is kept highly accurate by resistance adjustment, to a voltage that is proportional to the output voltage and drives the base of the series transistor via a buffer. Saturation control as a function of the load current prevents any over-saturation of the power element. If the externally scaled down output voltage at the reset threshold input drops below 1.35, the external reset delay capacitor is discharged by the reset generator. When the voltage of the capacitor reaches the lower threshold DRL, a reset signal occurs at the reset output and is held until the upper threshold DU is exceeded. If the reset threshold input is connected to, reset is triggered at an output voltage of typ A connected microcontroller will be monitored through the watchdog logic. In case of missing pulses at pin W, the reset output is set to low. The pulse sequence time can be set in a wide range with the reset delay capacitor. The IC can be switched at the TTL-compatible, low-active inhibit input. The IC also incorporates a number of internal circuits for protection against: Overload Overtemperature Reverse polarity Temperature Sensor Saturation Control and Protection Circuit W Watchdog Input Ι Bandgap Reference Control Amplifier Buffer Reset Generator Q D RO RADJ Output Reset Delay Reset Output Reset Threshold Adjustment INH Inhibit AEB368 Figure 2 Block Diagram Data Sheet 4 Rev. 2.9,

5 Table 2 Absolute Maximum Ratings Parameter Symbol Limit alues Unit Remarks Min. Max. Input I Input voltage Input current Reset Output RO oltage Current Reset Threshold RADJ I -42 I I R -.3 I R oltage RADJ Reset Delay D oltage Current Output Q oltage Current Inhibit INH D -.3 I D Q -.3 I Q oltage INH Watchdog W oltage W Ground Current I -.5 A Temperature Junction temperature Storage temperature Operating Range T j T stg C C Input voltage I 45 Junction temperature T j C internally limited internally limited internally limited internally limited Data Sheet 5 Rev. 2.9,

6 Table 2 Absolute Maximum Ratings (cont d) Parameter Symbol Limit alues Unit Remarks Min. Max. Thermal Resistance Junction-ambient R thj-a K/W K/W K/W K/W PG-DSO-14 1) ; Footprint only PG-DSO-14 1) ; 3 mm 2 Heat sink PG-DSO-8 1) ; Footprint only PG-DSO-8 1) ; 3 mm 2 Heat sink Junction-pin R thj-p 32 K/W PG-DSO-14 2) 1) Worst case; package mounted on PCB mm 3 ; 35μ Cu; 5μ Sn; zero airflow. 2) Measured to pin 4. Data Sheet 6 Rev. 2.9,

7 Table 3 Characteristics I = 13.5 ; -4 C < T j < 125 C; INH > 3.5 ; (unless specified otherwise) Parameter Symbol Limit alues Unit Test Condition Min. Typ. Max. Normal Operation Output voltage Q ma I Q 15 ma; 6 I 28 Output voltage Q I 32 ; I Q = 1 ma; T j = 1 C Output current I Q ma 1) Current consumption; I q = I I - I Q I q 5 μa INH = I q I q I q μa ma ma I Q = ma I Q = 15 ma I Q = 15 ma; I = 4.5 Drop voltage dr.35.5 I Q = 15 ma 1) Load regulation Δ Q,lo 25 m I Q = 5 ma to 15 ma Line regulation Δ Q.li 3 25 m I = 6 to 28 ; I Q = 15 ma Power Supply Ripple Rejection Reset Generator PSRR 54 db f r = 1 Hz; r =.5 pp Switching threshold Q,rt RADJ = Reset adjust RADJ,th Q > 3.5 threshold Reset low voltage RO,l.1.4 I RO = 1 ma Saturation voltage D,sat 5 1 m Q < R,th Upper timing DU threshold Lower reset timing DRL threshold Charge current I D,ch μa Reset delay time t rd ms C D = 1 nf Reset reaction time t rr μs C D = 1 nf Data Sheet 7 Rev. 2.9,

8 Table 3 Characteristics (cont d) I = 13.5 ; -4 C < T j < 125 C; INH > 3.5 ; (unless specified otherwise) Parameter Symbol Limit alues Unit Test Condition Min. Typ. Max. Watchdog Discharge current I D,wd μa D = 1. Upper timing DU threshold Lower timing threshold DWL Watchdog trigger time T WI,tr ms C D = 1 nf Inhibit Switching voltage INH,ON 3.6 IC turned on Turn-OFF voltage INH,OFF.8 IC turned off Input current I INH μa INH = 5 1) Drop voltage = i - Q (measured when the output voltage has dropped 1 m from the nominal value obtained at 6 input). Note: The reset output is low within the range Q = 1 to Q,rt. Data Sheet 8 Rev. 2.9,

9 Input Ι Q Output KL 15 Reset To MC 47 nf INH RO TLE 4263G D RADJ 1 nf 22 μf 1 kω W 56 kω Watchdog from MC AES369 Figure 3 Application Circuit Ι Ι Ι Q Ι Q 1 μf 47 nf TLE 4263G 22 μf 5.6 kω Ι + r Ι E INH RO Ι RD Q E C D Ι D, ch C D 1 nf Ι W W RADJ RADJ RO PSRR = 2 log r Δ Q, r AES37_4263 Figure 4 Test Circuit Data Sheet 9 Rev. 2.9,

10 Reset Timing The power-on reset delay time is defined by the charging time of an external capacitor C D which can be calculated as follows: C D = (t rd I D,ch )/Δ (1) Definitions: C D = delay capacitor t rd = reset delay time I D,ch = charge current, typical 6 μa Δ = DU, typical 1.7 DU = upper delay switching threshold at C D for reset delay time I Q < t rr t Q, rt D d d t I D, ch = C D t DU DRL trd t rr t RO t Power-ON Reset oltage Drop at Input Overtemperature Undervoltage Secondary Spike Load Bounce AET366 Figure 5 Time Response, Watchdog with High-Frequency Clock Data Sheet 1 Rev. 2.9,

11 Reset Switching Threshold The present default value is typ When using the TLE 4263 the reset threshold can be set to 3.5 < Q,rt < 4.6 by connecting an external voltage divider to pin RADJ. The calculation can be easily done since the reset adjust input current can be neglected. If this feature is not needed, the pin has to be connected to. Q,rt = (1 + R 1 /R 2 ) RADJ,th (2) Definitions: Q,rt = reset threshold RADJ,th = comparator reference voltage, typical 1.35 Watchdog Timing The frequency of the watchdog pulses has to be higher than the minimum pulse sequence which is set by the external reset delay capacitor C D. Calculation can be done according to the formula given in Figure 6. W Ι t Q T WD, p t D T WI, tr t DU DWL RO t WD, L t ( DU T = - DWL ) C WI, tr Ι D, wd D t AED399_4263 Figure 6 Timing of the Watchdog Function Reset Data Sheet 11 Rev. 2.9,

12 Reset Switching Threshold versus Output oltage 1.6 RADJ AED198_4263 Timing Threshold oltage DU and DRL versus Temperature I = 13.5 AED Ι = DU DRL Q C 16 T j Reset Switching Threshold versus Temperature Current Consumption of Inhibit versus Temperature 1.6 RADJ 1.4 AED188 I INH 16 µa 14 AED INH = C 16 T j C T j Data Sheet 12 Rev. 2.9,

13 Drop oltage versus Output Current Current Consumption versus Output Current 8 m dr 7 AED36_ ma I q 28 AED T j = 125 C 25 C I = ma 3 I Q ma 3 I Q Current Consumption versus Input oltage Ι q 3 ma 25 AED196 Output oltage versus Input oltage Q 12 1 AED197 2 = 25 R L Ω R L = 25 Ω Ι Ι Data Sheet 13 Rev. 2.9,

14 Charge Current and Discharge Current versus Temperature 8 μa Ι Ι D, ch Ι = 13.5 D = 1.5 AED364 Output oltage versus Temperature Q I = 13.5 AED Ι D, dis C 16 T j C 16 T j Pulse Time versus Temperature Output Current versus Input oltage 4 ms T WI,tr 35 AED365_ ma Ι Q 25 Tj = 25 C AED Ι = 13.5 C D = 1 nf C 16 T j Ι 5 Data Sheet 14 Rev. 2.9,

15 Package Outlines.35 x 45 ± (1.47) 1.75 MAX. C 1) MAX ) B.1.2 M AB14x 8 6±.2.64 ±.25.2 M C 1 7 1) Index Marking A 1) Does not include plastic or metal protrusion of.15 max. per side 2) Lead width can be.61 max. in dambar area GPS123 Figure 7 PG-DSO-14 (Plastic Dual Small Outline) Green Product (RoHS compliant) To meet the world-wide customer requirements for environmentally friendly products and to be compliant with government regulations the device is available as a green product. Green products are RoHS-Compliant (i.e Pb-free finish on leads and suitable for Pb-free soldering according to IPC/JEDEC J-STD-2). You can find all of our packages, sorts of packing and others in our Infineon Internet Page Products : SMD = Surface Mounted Device Dimensions in mm Data Sheet 15 Rev. 2.9,

16 MAX..35 x 45 1) MAX ) x ± ) Index Marking 1) Does not include plastic or metal protrusion of.15 max. per side 2) Does not include dambar protrusion of.5 max. per side GPS594 Figure 8 PG-DSO-2 (Plastic Dual Small Outline) Green Product (RoHS compliant) To meet the world-wide customer requirements for environmentally friendly products and to be compliant with government regulations the device is available as a green product. Green products are RoHS-Compliant (i.e Pb-free finish on leads and suitable for Pb-free soldering according to IPC/JEDEC J-STD-2). You can find all of our packages, sorts of packing and others in our Infineon Internet Page Products : SMD = Surface Mounted Device Dimensions in mm Data Sheet 16 Rev. 2.9,

17 ± (1.45) 1.75 MAX..35 x 45 1) MAX B.1.2 M A B 8x 6 ±.2.64 ± Index Marking 1 4 1) A 1) Does not include plastic or metal protrusion of.15 max. per side 2) Lead width can be.61 max. in dambar area GPS1229 Figure 9 PG-DSO-8 (Plastic Dual Small Outline) Green Product (RoHS compliant) To meet the world-wide customer requirements for environmentally friendly products and to be compliant with government regulations the device is available as a green product. Green products are RoHS-Compliant (i.e Pb-free finish on leads and suitable for Pb-free soldering according to IPC/JEDEC J-STD-2). You can find all of our packages, sorts of packing and others in our Infineon Internet Page Products : SMD = Surface Mounted Device Dimensions in mm Data Sheet 17 Rev. 2.9,

18 Revision History ersion Date Changes Rev Package version changed: - PG-DSO-2-35 to PG-DSO-2 Package naming harmonized according to Infineon standards: - PG-DSO-8-16 to PG-DSO-8 - PG-DSO-14-3 to PG-DSO-14 Rev Initial version of RoHS-compliant derivate of TLE 4263 Page 1: AEC certified statement added Page 1 and Page 15 ff:rohs compliance statement and Green product feature added Page 1 and Page 15 ff: Package changed to RoHS compliant version Legal Disclaimer updated Data Sheet 18 Rev. 2.9,

19 Edition Published by Infineon Technologies AG Munich, Germany 213 Infineon Technologies AG All Rights Reserved. Legal Disclaimer The information given in this document shall in no event be regarded as a guarantee of conditions or characteristics. With respect to any examples or hints given herein, any typical values stated herein and/or any information regarding the application of the device, Infineon Technologies hereby disclaims any and all warranties and liabilities of any kind, including without limitation, warranties of non-infringement of intellectual property rights of any third party. Information For further information on technology, delivery terms and conditions and prices, please contact the nearest Infineon Technologies Office ( Warnings Due to technical requirements, components may contain dangerous substances. For information on the types in question, please contact the nearest Infineon Technologies Office. Infineon Technologies components may be used in life-support devices or systems only with the express written approval of Infineon Technologies, if a failure of such components can reasonably be expected to cause the failure of that life-support device or system or to affect the safety or effectiveness of that device or system. Life support devices or systems are intended to be implanted in the human body or to support and/or maintain and sustain and/or protect human life. If they fail, it is reasonable to assume that the health of the user or other persons may be endangered.