2000 Apr 26

4

Philips Semiconductors

Preliminary specification

Very low dropout voltage/quiescent current

3.0 V voltage regulator with enable

TDA3672

FUNCTIONAL DESCRIPTION

The TDA3672 is a fixed 3.0 V regulator which can deliver

output currents up to 100 mA. The regulator is available in

an SO8 package with fused centre pins connected to the

lead frame. The regulator is intended for portable, mains,

telephone and automotive applications. To increase the

lifetime of batteries, a specially built-in clamp circuit keeps

the quiescent current of this regulator very low, also in

dropout and full load conditions.

The regulator remains operating down to very low supply

voltages and below this voltage it switches off.

A temperature protection circuit is included, which

switches off the regulator output at a junction temperature

above 150

°C.

A new output circuit guarantees the stability of the

regulator for a capacitor output circuit with an ESR up

to 20

Ω (see Fig.5). If only a 100 nF capacitor is used, the

attractive as the ESR of an electrolytic capacitor increases

strongly at low temperatures (no expensive tantalum

capacitor is required).

LIMITING VALUES

In accordance with the Absolute Maximum Rating System (IEC 60134).

THERMAL CHARACTERISTICS

QUALITY SPECIFICATION

In accordance with

“SNW-FQ-611E”.

SYMBOL

PARAMETER

CONDITIONS

MIN.

MAX.

UNIT

supply voltage

−

45

V

reverse polarity supply voltage

non-operating

−−25

V

total power dissipation

temperature of copper area

is 25

°C

−

4.1

W

storage temperature

non-operating

−55

+150

°C

ambient temperature

operating

−40

+125

°C

junction temperature

operating

−40

+150

°C

SYMBOL

PARAMETER

CONDITIONS

VALUE

UNIT

thermal resistance from junction to ambient

in free air; soldered in

125

K/W

thermal resistance from junction to case

to centre pins; soldered in

30

K/W