TLE7368 datasheet(8/39 Pages) INFINEON

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TLE7368

Pin Configuration

Data Sheet

Rev. 1.1, 2007-11-08

SEL_LDO2 Selection input LDO2;

Connect to GND to select 2.6 V output voltage for LDO2;

Connect straight to Q_LDO2 to select 3.3 V output voltage for LDO2.

WDI

Window Watchdog input;

Apply a watchdog trigger signal to this pin

WDO

Window Watchdog output;

Open drain output, active low,

connect external 10 k

Ω pull-up resistor to microcontroller I/O voltage

25, 26

26, 27

Buck power stage’s output;

Connect both pins directly, on short lines, to the Buck converter circuit,

i.e. the catch diode and the Buck inductance

BST

Bootstrap driver supply input;

Connect the buck power stage’s driver supply capacitor to the SW pins;

For capacitor selection please refer to Chapter 6.

FB/L_IN

Buck converter feedback input plus input for LDO1 and trackers;

Connect the output of the buck converter circuit with short lines to these

pins; For Buck output capacitor selection please refer to Chapter 6.

Q_LDO1

Voltage regulator 1 output;

5 V output; Block to GND with capacitor for stable regulator operation;

Selection of capacitor

Q_LDO1 according to Chapter 4.4 and

Chapter 6.

FB_EXT

External regulator feedback input;

Feedback input of control loop for the external power stage regulator.

Connect to the emitter of the regulating transistor; Block to GND with

capacitor for stable regulator operation; Selection of capacitor

Q_FB_EXT according to Chapter 4.4 and Chapter 6.

DRV_EXT

Bipolar power stage driver output;

Connect the base of an external NPN transistor directly to this pin;

Regarding choice of the external power stage refer to Chapter 6.

32, 33

–

N.C.

Internally not connected; Connect to GND_A.

Q_STBY

Stand-by regulator output;

Output voltage depending on the state of SEL_STBY; Block to GND

with capacitor for stable regulator operation; Selection of capacitor

Q_STBY according to Chapter 4.4 and Chapter 6.

IN_STBY

Input to stand-by regulator;

Always connect the reverse polarity protected battery line to this pin;

Input to all IC internal biasing circuits;

Block to GND directly at the IC with ceramic capacitor; For proper

choice of input capacitors please refer to Chapter 6.

MON_STBY Monitoring output for stand-by regulator; power fail active low

output with special timing, open drain, connect external pull-up resistor.

–

GND_A

Analog ground connection;

Connect to exposed pad.

(TLE7368G)

(TLE7368E)

Symbol

Function

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