TDA3618JR/N1 Просмотр технического описания (PDF) - Philips Electronics

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производитель

TDA3618JR/N1

Multiple voltage regulator with switch and ignition buffers

Philips Electronics 

Philips Semiconductors

Multiple voltage regulator with switch and

ignition buffers

Preliminary specification

TDA3618JR

FEATURES

General

• Extremely low noise behaviour and good stability with

very small output capacitors

• Two VP-state controlled regulators (regulators 1 and 3)

and a power switch

• Regulator 2, reset and ignition buffer operate during

load dump and thermal shutdown

• Separate control pins for switching regulators

(regulators 1 and 3) and the power switch

• Supply voltage range of −18 to +50 V

• Low reverse current of regulator 2

• Low quiescent current (when regulator 1, regulator 3

and power switch are switched off)

• Hold output for low VP (regulators 1 and 3 off)

• Hold output for regulators 1 and 3

• Hold output for foldback mode switch

• Hold output for load dump and temperature protection

• Reset and hold outputs (open collector outputs)

• Adjustable reset delay time

• High ripple rejection

• backup capacitor for regulator 2

• Two independent ignition buffers (one inverted and with

open collector output).

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 protections with hysteresis

• Load dump protection

• Foldback current limit protection for

regulators 1, 2 and 3

• Delayed second current limit protection for the power

switch (at short circuit)

• The regulator outputs and the power switch are DC

short circuited safe to ground and VP.

GENERAL DESCRIPTION

The TDA3618JR is a multiple output voltage regulator with

a power switch and ignition buffers, intended for use in car

radios with or without a microcontroller. It contains:

• Two fixed voltage regulators with a foldback current

protection (regulators 1 and 3) and one fixed voltage

regulator (regulator 2), intended to supply a

microcontroller, which also operates during load dump

and thermal shutdown

• A power switch with protections, operated by an enable

input

• Reset and hold outputs that can be used to interface

with the microcontroller. The reset signal can be used to

call up the microcontroller.

• A supply pin which can withstand load dump pulses and

negative supply voltages

• Regulator 2, which is switched on at a backup voltage

greater than 6.5 V and off when the output voltage of

regulator 2 drops below 1.9 V

• A provision for the use of a reserve supply capacitor that

will hold enough energy for regulator 2 (5 V continuous)

to allow a microcontroller to prepare for loss of voltage

• An inverted ignition 1 input with open collector output

stage

• An ignition 2 input Schmitt trigger with push-pull output

stage.

ORDERING INFORMATION

TYPE

NUMBER

TDA3618JR

NAME

DBS17P

PACKAGE

DESCRIPTION

plastic DIL-bent-SIL (specially bent) power package;

17 leads (lead length 12 mm)

VERSION

SOT475-1

1999 Sep 01

2

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