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TDA3601AQ

Multiple output voltage regulators

Philips Electronics 

Philips Semiconductors

Multiple output voltage regulators

Product specification

TDA3601Q

TDA3601AQ

FUNCTIONAL DESCRIPTION

The TDA3601Q is a multiple output voltage regulator with

six fixed voltage regulators. Three, logical switch

controlled, voltage regulators (numbers 4 to 6) are

available, and one non-switchable voltage regulator

(number 1). In addition, there are two further regulators

(numbers 2 and 3), which are controlled by supply

voltages VP1 and VP2 (Schmitt trigger).

Regulator 1 is not affected by load dump or thermal

shutdown. Regulators 2 to 6 are supplied by VP2; they can

therefore be switched of by an ignition switch, for example.

An internal bandgap voltage reference, which provides a

reference voltage for each independent regulator, is

supplied by VP1. This supply voltage VP1 also supplies

regulator 1.

A VP2 sense circuit outputs a logical high when the VP2

voltage rises through Vthr, which remains high until the VP2

voltage falls through Vthf.

The supply voltage VP1 is sensed by an out-of-regulation

Schmitt trigger.

When this voltage drops below 5.95 V typical, the reset

output is disabled, to prevent a microprocessor being

disturbed by a too-low supply voltage. An out-of-regulation

condition is indicated by a logical low and an in-regulation

condition indicated by a logical high.

The ‘Power On’ switch low will disable regulator 2 and 3

outputs. In addition, the logic switch will be disabled, so

that regulators 4 to 6 are switched off. When both

VP2-sense and out-of-regulation are high, the ‘Power On’

will be high, so that the logic multiplexer and regulators 2

and 3 are enabled. Regulators 4 to 6 can now be selected

by the multiplexer.

Re-triggerable one-shot circuits produce a RESET (open

collector output) when VP1 is available (40 ms delay

signal), or when both VP1 and VP2 are available (100 µs

pulse). RESET will be held in a constant high state when

the supply voltage VP1 is less than 5.5 V (5.95 V typical).

The TDA3601 has a RESET output, but the TDA3601A

has an inverted RESET output (RESET).

LIMITING VALUES

In accordance with the Absolute maximum System (IEC 134).

SYMBOL

VP1, VP2

PARAMETER

supply voltage

Ptot

total power dissipation

Tstg

storage temperature range

Tvj

virtual junction temperature

Vpr

reverse polarity

CONDITIONS

MIN.

operating

−

non-operating

−

load dump protected; during 50 ms; −

tr > 2.5 ms; note 1

Tcase < 30 °C

−

non-operating

−55

operating

−40

non-operating

−

Note

1. Regulator 1 operating, 0.5 mA ≤ IR1 ≤ 20 mA.

MAX.

18

30

50

15

150

150

6

UNIT

V

V

V

W

°C

°C

V

THERMAL CHARACTERISTICS

SYMBOL

Rth j-c

Rth j-amb

PARAMETER

thermal resistance from junction to case

thermal resistance from junction to ambient in free air

VALUE

8

40

UNIT

K/W

K/W

QUALITY SPECIFICATION

Quality according to UZW-BO/FQ-0601.

1995 Dec 13

5

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