TDA3605Q データシートの表示（PDF） - Philips Electronics

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TDA3605Q

Multiple voltage regulator with switch

Philips Electronics 

Philips Semiconductors

Multiple voltage regulator with switch

Preliminary specification

TDA3605Q

FEATURES

• Two VP-state controlled regulators (regulator 1 and

regulator 3) and a power switch

• Regulator 2, reset and ignition buffer operates during

load dump and thermal shutdown

• Separate control pins for switching regulator 1,

regulator 3 and the power switch

• Supply voltage range of −18 to +50 V (operating from

11 V)

• Low reverse current of regulator 2

• Low quiescent current (when regulator 1, regulator 3,

and power switch are switched off)

• Hold output (only valid when regulator 1 is switched on)

• Reset and hold outputs (open collector outputs)

• Adjustable reset delay time

• High ripple rejection

• Back-up capacitor for regulator 2.

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

• Local thermal protection for power switch

• 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 TDA3605Q is a multiple output voltage regulator with

a power switch, intended for use in car radios with or

without a microcontroller. It contains:

1. Two fixed voltage regulators with a foldback current

protection (regulator 1 and regulator 3) and one fixed

voltage regulator (regulator 2), intended to supply a

microcontroller, that also operates during load dump

and thermal shutdown.

2. A power switch with protections, operated by an

enable input.

3. Reset and hold outputs can be used to interface by the

microcontroller. The reset signal can be used to call up

the microcontroller and the hold output indicates

regulator 1 voltage available and within range.

4. A supply pin which can withstand load dump pulses

and negative supply voltage.

5. Regulator 2 will be switched on at a supply voltage

>6.5 V and off at a voltage of regulator 2 <1.9 V.

6. Also there is a provision for 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.

ORDERING INFORMATION

TYPE NUMBER

TDA3605Q

PACKAGE

NAME

DESCRIPTION

DBS13P plastic DIL-bent-SIL power package; 13 leads (lead length 12 mm)

VERSION

SOT141-6

1997 Jul 09

2

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