Datasheet

ManualsBrandsINFINEON TECHNOLOGIES ManualsVoltage RegulatorsTLE4268GS

Type Package

TLE 4268 GS PG-DSO-8-16

TLE 4268 G PG-DSO-20-35

5-V Low Drop Fixed Voltage Regulator

TLE 4268

P-DSO-8-3, -6, -7, -8, -9

P/PG-DSO-20-1,-6,-7,-9,-14,-

Data Sheet 1 Rev. 1.5, 2007-03-20

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 deliver an output

current of at least 180 mA. The IC is short-circuit proof

and features temperature protection that disables the

circuit in the event of impermissibly high temperatures. The watchdog function is

disabled as a function of the load, so that a controller is not interrupted during sleep

mode by a watchdog reset.

Application Description

The IC regulates an input voltage

in the range 5.5 V < V

< 45 V to V

Q,nom

= 5.0 V. In

the event of an output voltage

< V

, a reset signal is generated. The wiring of the

reset switching threshold input enables the value of

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

Summary of content (17 pages)

PAGE 1
5-V Low Drop Fixed Voltage Regulator TLE 4268 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 P-DSO-8-3, -6, -7, -8, -9 Functional Description This device is a 5-V low-drop fixed-voltage regulator.
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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 not activated during power-down and the current drain is not increased. The IC is protected against overload and overtemperature. PG-DSO-8-16 Ι N.C.
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TLE 4268 PG-DSO-20-35 N.C. N.C. RO GND GND GND GND N.C. D RADJ 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 N.C. N.C. Ι GND GND GND GND N.C. Q W AEP01540 Figure 2 Pin Configuration (top view) Table 2 Pin Definitions and Functions Pin Symbol Function 1, 2, 8, 13, N.C. 19, 20 Not connected. 3 RO Reset output; the open collector output is connected to the 5-V output via an integrated resistor of 30 kΩ.
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TLE 4268 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.
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TLE 4268 Table 3 Absolute Maximum Ratings Parameter Symbol Limit Values Unit Notes Min. Max. VI II -30 – 45 – V – – Internally limited VR IR -0.3 – 7 – V – – Internally limited VD ID -0.3 – 7 – V – – Internally limited VW -0.3 7 V – VRADJ -0.3 7 V – VQ IQ -0.
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TLE 4268 Table 4 Operating Range Parameter Input voltage Junction temperature Symbol Limit Values Unit Notes Min. Max. VI Tj – 45 V – -40 150 °C – Rthj-a Rthj-a Rthj-pin Rthj-pin – – 185 100 K/W K/W PG-DSO-8-161) PG-DSO-20-351) – – 72 23 K/W K/W PG-DSO-8-162) PG-DSO-20-353) Thermal Resistance Junction ambient (soldered) Junction pin 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.
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TLE 4268 Table 5 Characteristics VI = 13.5 V; -40 °C ≤ Tj ≤ 125 °C (unless otherwise specified) Parameter Output voltage Symbol VQ Output current limiting IQ Limit Values Unit Test Condition Min. Typ. Max. 4.90 5.00 5.10 V 5 mA ≤ IQ ≤ 150 mA; 6 V ≤ VI ≤ 28 V 180 250 – mA – Current consumption Iq = II - IQ Iq – 300 450 µA IQ = 0 mA Current consumption Iq = II - IQ Iq – 13 20 mA IQ = 150 mA Drop voltage VDR ∆VQ,Lo ∆VQ,Li – 0.25 0.
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TLE 4268 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. ID,d ID,c VDU 1.5 3.5 5.2 µA 5 12 18 µA VD = 1.0 V VD = 1.0 V 1.4 1.8 2.2 V – VDWL 0.2 0.4 0.
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TLE 4268 ΙΙ 1000 µ F Ι Q ΙQ 22 µF 470 nF TLE 4268G VΙ W D GND RO RADJ Ι dis VW VD Ιd ΙR VQ VR ΙM VRES CD 100 nF AES01541 VDr = VΙ -VQ Outside the control range Figure 4 Data Sheet Test Circuit 9 Rev. 1.
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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.
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TLE 4268 VW Ι t VΙ VQ t T WP VD T WT t t WD, L t VDU VDWL VWO T WT = (VDU - VDWL ) Ι D, d C D ; T WP = (VDU - VDWL ) (Ι D, c + Ι D, d ) Ι D, c x Ι D, d C D ; t WD, L = (VDU - VDWL ) Ι D, c t CD AED03011_68 Figure 6 Data Sheet Timing of the Watchdog Function 11 Rev. 1.
PAGE 12
TLE 4268 Drop Voltage VDR versus Output Current IQ Current Consumption Iq versus Output Current IQ AED01544 mV 700 16 I q mA 14 600 12 500 10 V dr 400 AED01545 VI = 13.
PAGE 13
TLE 4268 Charge Current ID,c and Discharge Current ID,d versus Temperature Tj Ι Timing Threshold VDU, VDWL, VDRL versus Temperature Tj AED3100 16 µA VD VΙ = 13.5 V VD = 1.0 V 14 12 AED03101 V 2.8 V Ι = 13.5 V 2.4 Ι D, c 10 2.0 8 1.6 6 1.2 4 0.8 V DU Ι D, d V DWL , V DRL 2 0 -40 0.4 0 40 80 120 0 -40 C 0 80 40 C Tj Tj Output Voltage VQ versus Temperature Tj Output Current IQ versus Input Voltage VI AED03102 V 120 AED01551 300 IQ mA VQ Tj = 25 ˚C 250 5.1 VΙ = 13.
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TLE 4268 Package Outlines 1.27 0.1 0.41 +0.1 -0.06 0.19 +0.0 6 B 0.64 ±0.25 0.2 M A B 8x 8 5 Index Marking 1 4 5 -0.21) 8° MAX. 4 -0.21) 1.75 MAX. 0.175 ±0.07 (1.45) 0.35 x 45° 6 ±0.2 A 1) Does not include plastic or metal protrusion of 0.15 max. per side 2) Lead width can be 0.61 max.
PAGE 15
2.65 MAX. 0.35 x 45˚ 1.27 0.35 +0.15 0.1 20x 2) 0.2 20x 20 0.4 +0.8 0.23 +0.09 7.6 -0.2 1) 8˚ MAX. 2.45 -0.2 0.2 -0.1 TLE 4268 10.3 ±0.3 11 1 10 12.8 -0.2 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.
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TLE 4268 Version Date 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 Data Sheet Changes 16 Rev. 1.
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Edition 2007-03-20 Published by Infineon Technologies AG 81726 Munich, Germany © 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.