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TDA3681A

Multiple voltage regulator with switch and ignition buffer

Philips Electronics 

Philips Semiconductors

Multiple voltage regulator with

switch and ignition buffer

Product specification

TDA3681A

PINNING

SYMBOL PIN

DESCRIPTION

REG4 1

IGNIN

2

IGNOUT 3

RES

4

CRES

5

EN4

6

EN1/3 7

ENSW 8

HOLD 9

GND

10

HEATTAB 11

REG2 12

BU

13

VP1

14

n.c.

15

SW

16

REG1 17

n.c.

18

REG3 19

VP2

20

regulator 4 output

ignition input

ignition output (active HIGH)

reset output (active LOW)

reset delay capacitor

enable input for regulator 4

enable input for regulators 1 and 3

enable input for power switch

hold output (active LOW)

ground

heat tab connection; note 1

regulator 2 output

backup switch output

first supply voltage

not connected

power switch output

regulator 1 output

not connected

regulator 3 output

second supply voltage

Note

1. The pin is used for final test purposes. In the

application it should be connected directly to ground.

handbook, halfpage

VP2 20

REG3 19

n.c. 18

REG1 17

1 REG4

2 IGNIN

3 IGNOUT

4 RES

SW 16

5 CRES

TDA3681ATH

n.c. 15

6 EN4

VP1 14

BU 13

7 EN1/3

8 ENSW

REG2 12

9 HOLD

HEATTAB 11

10 GND

MGU563

Fig.2 Pin configuration.

2003 Aug 29

5

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