1997 Aug 21

2

Philips Semiconductors

Product specification

Multiple voltage regulators with external

reset delay and switch

TDA3604Q;

TDA3604TH

FEATURES

General

• One V

• Regulator 2, reset and ignition buffer operate during

load dump and thermal shutdown

• Separate control pins for switching regulator 1 and the

power switch

• Supply voltage range of −18 to +50 V

(operating from 9.75 V)

• Low reverse current of regulator 2

• Low quiescent current (when regulator 1, power switch

and ignition buffer are switched off)

• Ignition input/output

• Reset output

• Adjustable reset delay time

• High ripple rejection

• Power switch

• Separate supply for the power switch.

Protections

• Reverse polarity safe (down to −18 V without high

reverse current)

• Able to withstand voltages up to 18 V at the outputs

(supply line may be short-circuited)

• ESD protected on all pins

• Thermal protection

• Load dump protection

• Foldback current limit protection for regulators 1 and 2

• Delayed second current limit protection for the power

switch

• The regulator outputs and the power switch are

GENERAL DESCRIPTION

The TDA3604Q and TDA3604TH are multiple output

voltage regulators with a power switch, intended for use in

car radios with or without a microcontroller.

It contains one fixed voltage regulator with a foldback

current protection (regulator 1) and one fixed voltage

regulator (regulator 2), intended to supply a

microcontroller, that also operates during load dump and

thermal shutdown.

There is a power switch with protections, operated by an

enable input.

The reset and ignition outputs can be used to interface by

the microcontroller. The reset signal can be used to call up

the microcontroller and the ignition output indicates

ignition voltage available.

Both supply pins can withstand load dump pulses and

negative supply voltages.

Regulator 2 will be switched on at a supply voltage >6.5 V

and off at a voltage of regulator 2 <1.9 V.

ORDERING INFORMATION

TYPE

NUMBER

PACKAGE

NAME

DESCRIPTION

VERSION

TDA3604Q

DBS13P

plastic DIL-bent-SIL power package; 13 leads (lead length 12 mm)

SOT141-6

TDA3604TH

HSOP20 plastic heat-dissipating small outline package; 20 leads; low stand-off

SOT418-2