TLE4268

TLE4268_07 INFINEON | Alldatasheet

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Technical content

Features

• Output voltage tolerance ≤ ±2%  Very low current consumption  Low-drop voltage  Watchdog  Settable reset threshold  Overtemperature protection  Reverse polarity protection  Short-circuit proof  Suitable for use in automotive electronics  Wide temperature range  Green Product (RoHS compliant)  AEC Qualified Functional Description This device is a 5-V low-drop fixed-voltage regulator. The maximum input voltage is 45 V. It can deli ver an output current of at least 180 mA. Th e IC is short-circuit proof and features temperature protection that disables the circuit in the event of impermissibly hi gh temperatures. The watchdog function is disabled as a function of th e load, so that a controller is not interrupted during sleep mode by a watchdog reset. Application Description The IC regulates an input voltage VI in the range 5.5 V < VI < 45 V to VQ,nom = 5.0 V. In the event of an output voltage VQ < VRT, a reset signal is generat ed. The wiring of the reset switching threshold input enables the value of VRT to be reduced. The reset delay time can be adjusted using an external capacitor. The integrated watchdog monitors the connected active controller. If there is no rising edge at the watchdog input, the reset

Data Sheet 2 Rev. 1.5, 2007-03-20 TLE 4268 output is set to low. The reset delay capacitor provides a wide adjustment range for the pulse repetition time. The watchdog function is only activated if the load exceeds 8 mA. This ensures that a microcontroller is no t activated during power-down and the current drain is not increased. The IC is protected against overload and overtemperature. Figure 1 Pin Configuration (top view) Table 1 Pin Definitions and Functions Pin Symbol Function

1 I Input voltage

2 N.C. Not connected

3 RO Reset output

4 GND Ground

5 D Reset delay

6 RADJI Reset swit ching threshold

7 W Watchdog input

8 Q 5 V output voltage

W GND 5 7N.C. AEP01954 Q RO D PG-DSO-8-16

Data Sheet 3 Rev. 1.5, 2007-03-20 Figure 2 Pin Configuration (top view) Table 2 Pin Definitions and Functions Pin Symbol Function 1, 2, 8, 13, 19, 20 N.C. Not connected. 3R O Reset output; the open collector output is connected to the 5-V output via an integrated resistor of 30 kΩ. 4 … 7, 14 … 17 GND Ground 9D Reset delay; connect a capacitor to ground for delay time adjustment.

10 RADJ Reset switching threshold; for setting the switching threshold,

output to ground with voltage divider. If this input is connected to ground, the reset is triggered at an output voltage of 4.5 V.

11 W Watchdog input; positive-edge-triggered input for monitoring a

microcontroller.

12 Q 5-V output voltage; block to ground with 22 µF capacitor,

ESR < 3 Ω.

18 I Input voltage; block to ground directly on the IC with ceramic

capacitor. AEP01540 GND Q Ι N.C. N.C. N.C. GND 5 GNDGND N.C. D RO GND GND RADJ GND GND W N.C. N.C. PG-DSO-20-35

Data Sheet 4 Rev. 1.5, 2007-03-20 TLE 4268 Circuit Description The control amplifier compares a reference voltage, which is ke pt 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 V, the external reset delay capacitor is discharged by th e reset generator. If the voltag e on the capacitor reaches the lower threshold VDRL, a reset signal is generated on the reset output and not cancelled again until the upper threshold voltage is exceeded. If the reset threshold input is connected to GND, reset is triggered at an outpu t voltage of 4.5 V. A connected microcontroller is monitored by the watchdog logic. If pulses are missing, the rest output is set to low. The pulse sequence time can be set within a wide range with the reset delay capacitor. The IC also incorporates internal circuits for protection against:  Overload  Overtemperature  Reverse polarity Figure 3 Block Diagram TLE 4268 G (PG-DSO-20-35) AEB01539 Temperature Sensor Control Amplifier Protection Circuit Reference BandgapAdjustment Generator Reset Watchdog Watchdog Input Output Reset Reset Reset Output Switching Delay Threshold 18Input 4-7, 14-17 GND

Data Sheet 5 Rev. 1.5, 2007-03-20 Table 3 Absolute Maximum Ratings Parameter Symbol Limit Values Unit Notes Min. Max. Input I Input voltage Input current VI II -30 V Internally limited Reset Output RO Voltage Current VR IR -0.3 V Internally limited Reset Delay D Voltage Current VD ID -0.3 V Internally limited Watchdog W Watchdog input VW -0.3 7 V – Reset Switching Threshold RADJ Reset threshold VRADJ -0.3 7 V – Output Q Output voltage Output current VQ IQ -0.3 V Internally limited Ground GND Current IGND -100 50 mA – Temperatures Junction temperature Storage temperature Tj TS -40 -50 150 150

Data Sheet 6 Rev. 1.5, 2007-03-20 TLE 4268 Optimum reliability and life time are guar anteed if the junction temperature does not exceed 125 °C in operating mode. Operation at up to the maximum junction temperature of 150 °C is possible in principle. Note, howev er, operation at the maximum permitted ratings could affect the reliability of the device. Table 4 Operating Range Parameter Symbol Limit Values Unit Notes Min. Max. Input voltage VI –4 5 V – Junction temperature Tj -40 150 °C– Thermal Resistance Junction ambient (soldered) Rthj-a Rthj-a 185 100 K/W K/W PG-DSO-8-161) PG-DSO-20-351) Junction pin Rthj-pin Rthj-pin K/W K/W PG-DSO-8-162) PG-DSO-20-353) 1) Package mounted on PCB 80 × 80 × 1.5 mm3; 35µ Cu; 5µ Sn; Footprint only; zero airflow. 2) Measured to pin 2. 3) Measured to pin 5.

Data Sheet 7 Rev. 1.5, 2007-03-20 Table 5 Characteristics VI = 13.5 V; -40 °C ≤ Tj ≤ 125 °C (unless otherwise specified) Parameter Symbol Limit Values Unit Test Condition Min. Typ. Max. Output voltage VQ 4.90 5.00 5.10 V 5 mA ≤ IQ ≤ 150 mA;

6 V ≤ VI ≤ 28 V

Output current limiting IQ 180 250 – mA – Current consumption Iq = II - IQ Iq – 300 450 µA IQ = 0 mA Current consumption Iq = II - IQ Iq – 1 32 0m A IQ = 150 mA Drop voltage VDR – 0.25 0.50 V IQ = 150 mA1) Load regulation ∆VQ,Lo – 1 03 0m V IQ = 5 to 150 mA Line regulation ∆VQ,Li – 1 03 0m V VI = 6 to 28 V IQ = 150 mA Reset Generator Reset threshold VQ,rt 4.2 4.5 4.8 V – Reset adjust threshold VRADJ 1.28 1.35 1.45 V – Reset low voltage VRO,l – 0.2 0.5 V 1 mA external Saturation voltage VD – 30 100 mV VQ < VRT Charging current ID,c 51 2 1 8 µA VD = 1.0 V Upper reset timing threshold VDU 1.4 1.8 2.2 V – Reset delay time trd 10 15 25 ms CD = 100 nF Reset reaction time trr –2– µs CD = 100 nF Pull-up RRO 18 30 46 k Ω with resp. to VQ Lower reset timing threshold VDRL 0.2 0.4 0.55 V –

Data Sheet 8 Rev. 1.5, 2007-03-20 TLE 4268 Note: The reset output is low in range from VQ = 1 V to VQ,rt. Watchdog Discharge current ID,d 1.5 3.5 5.2 µA VD = 1.0 V Charging current ID,c 51 2 1 8 µA VD = 1.0 V Upper timing threshold VDU 1.4 1.8 2.2 V – Lower timing threshold VDWL 0.2 0.4 0.55 V – Watchdog period TWP 30 55 75 ms CD = 100 nF Watchdog trigger time TWT 25 40 60 ms CD = 100 nF Activating current IQ 2 8 15 mA Activates watchdog Slew rate d VW/ d t 5––V / µs from 20% up to 80% VQ 1) Drop voltage = VI - VQ (measured when the output voltage has dropped 100 mV from the nominal value obtained at 13.5 V input) 2) Watchdog pulse recognition tested with 10 kHz max. pulse frequency Table 5 Characteristics (cont’d) VI = 13.5 V; -40 °C ≤ Tj ≤ 125 °C (unless otherwise specified) Parameter Symbol Limit Values Unit Test Condition Min. Typ. Max.

Data Sheet 9 Rev. 1.5, 2007-03-20 Figure 4 Test Circuit AES01541 TLE 4268G 1000 Fµ VΙ R QV Ι Ι Ι d Ι M Ι Q C D 100 nF VD Ι R 22 Fµ QV-ΙVVDr = 470 nF RESV VWV Outside the control range disΙ Ι W D GND RADJ RO Q

Data Sheet 10 Rev. 1.5, 2007-03-20 TLE 4268 Reset Timing The power-on reset delay time is defined by the charging time of an external capacitor CD which can be calculated as follows: CD = (∆trd × ID,c)/∆V (1) Definitions:  CD = delay capacitor  ∆trd = delay time  ID,c = charge current, typical 12 µA  ∆V = VDU, typical 1.8 V  VDU = upper delay switching threshold at CD for reset delay time The reset reaction time trr is the time it takes the volt age regulator to set the reset out LOW after the output voltage has dropped below the reset threshold. It is typically 1 µs for delay capacitor of 47 nF. For other values for CD the reaction time can be estimated using the following equation: trr ≈ 20 s/F × CD (2) Figure 5 Timing (Watchdog disabled) AED03010 Thermal t rd Power-on-Reset Voltage Dip Secondary Overload at OutputSpike VΙ D,cΙ Vd dt VQ Q, rtV t rr< rrt at Input Undervoltage Shutdown CD t VRO DV t t t VDU VDRL

Data Sheet 11 Rev. 1.5, 2007-03-20 Figure 6 Timing of the Watchdog Function AED03011_68 WV V VQ DV VWO VDU -VDWL() Ι( D, c + D, d )Ι ΙD, cΙ x D, d TWP = WD, Lt WPT WTT WD, Lt = VV( DU - DWL ) Ι D, c T = VV( DU - DWL ) Ι D, d DUV VDWL Ι Ι WT CD ;; DCDC t t t t t

Data Sheet 12 Rev. 1.5, 2007-03-20 TLE 4268 Drop Voltage VDR versus Output Current IQ Current Consumption Iq versus Input Voltage VI Current Consumption Iq versus Output Current IQ Output Voltage versus Input Voltage VI AED01544 = 125 Vdr T mV C 100 200 300 400 500 600 700 QΙ 50 100 150 200 mA CT 25= 250 j j AED01546 = 33 ΩR Iq V 10 20 30 40 50 L I LR Ω= 50 LR Ω= 100 Tj = 25 ˚CmA V AED01545 QI qI VI = 13.5 V T = 25 ˚Cj 50 100 150 200mA mA AED01547 VQ V mA 24 6 8 V Ι LR Ω33=

Data Sheet 13 Rev. 1.5, 2007-03-20 TLE 4268 Charge Current ID,c and Discharge Current ID,d versus Temperature Tj Output Voltage VQ versus Temperature Tj Timing Threshold VDU, VDWL, VDRL versus Temperature Tj Output Current IQ versus Input Voltage VI -40 0 40 Ι = 1.0 VV Ι Ι D, d D, c D

13.5 VVΙ =

j 12080 T C AED3100 Aµ AED03102 -40 4.6 VQ 4.7 4.8 4.9 5.0 5.1 V 04 0 80 120 V

13.5 VΙV =

-40 = 13.5 V VD T V 04 0 80 120 C VΙ 0.4 0.8 1.2 1.6 2.0 2.4 2.8 DUV DWLVV DRL j AED01551 IQ 100 150 200 250 300 10 20 30 40 50 VI Tj = 25 ˚CmA V

Data Sheet 14 Rev. 1.5, 2007-03-20 TLE 4268 Package Outlines Figure 7 PG-DSO-8-16 (Plastic Dual Small Outline) Green Product (RoHS compliant) To meet the world-wi de customer requirements for envi ronmentally friendly products and to be compliant with government regula tions the device is available as a green product. Green products are Ro HS-Compliant (i.e Pb-free fi nish on leads and suitable for Pb-free soldering according to IPC/JEDEC J-STD-020). 1) Does not include plastic or metal protrusion of 0.15 max. per side -0.06 -0.2 +0.1 0.41 1.27 A 0.1

0.2 M A

(1.45) 0.175 1.75 MAX. B B 6±0.2 0.64 4 -0.2 0.19 +0.06 0.35 x 45° ±0.25 MAX.8° Index Marking ±0.07 2) Lead width can be 0.61 max. in dambar area GPS01229 Y ou can find all of our packages, sorts of packing and others in our Infineon Internet Page “Products”: http://www.infineon.com/products. Dimensions in mmSMD = Surface Mounted Device

Data Sheet 15 Rev. 1.5, 2007-03-20 Figure 8 PG-DSO-20-35 (Plastic Dual Small Outline) Green Product (RoHS compliant) To meet the world-wi de customer requirements for envi ronmentally friendly products and to be compliant with government regula tions the device is available as a green product. Green products are Ro HS-Compliant (i.e Pb-free fi nish on leads and suitable for Pb-free soldering according to IPC/JEDEC J-STD-020). GPS05094 1.27 12.8 1) -0.2 11 0 1120 2.65 MAX. 2.45 20x0.1 -0.2 0.2-0.1 Index Marking 1) Does not include plastic or metal protrusion of 0.15 max. per side 2) Does not include dambar protrusion of 0.05 max. per side 0.35 x 45˚ -0.2 1)7.68˚ MAX. ±0.310.3 0.4+0.8 0.23 +0.09 Y ou can find all of our packages, sorts of packing and others in our Infineon Internet Page “Products”: http://www.infineon.com/products. Dimensions in mmSMD = Surface Mounted Device

Data Sheet 16 Rev. 1.5, 2007-03-20 TLE 4268 Version Date Changes Rev. 1.5 2007-03-20 Initial version of RoHS-compliant derivate of TLE 4268 Page 1: AEC certified statement added Page 1 and Page 14 ff: RoHS compliance statement and Green product feature added Page 1 and Page 14 ff: Package changed to RoHS compliant version Legal Disclaimer updated

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© 2007 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 (www.infineon.com). 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.