1999 Sep 01

4

Philips Semiconductors

Preliminary specification

Very low dropout voltage/quiescent

current 5 V voltage regulator

TDA3664

FUNCTIONAL DESCRIPTION

The TDA3664 is a fixed 5 V regulator which can deliver

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

SO8 and SOT223 packages. 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 operational down to very low supply

voltages, below which it switches off.

A temperature protection is included, which switches the

regulator output off at IC temperatures above 150

°C.

A new output structure guarantees the stability of the

regulator with an ESR up to 38

Ω. This is very attractive as

the ESR of an electrolytic capacitor increases strongly at

low temperatures (no expensive tantalum capacitor

required).

LIMITING VALUES

In accordance with the Absolute Maximum Rating System (IEC 134).

THERMAL CHARACTERISTICS

QUALITY SPECIFICATION

In accordance with

“SNW-FQ-611E”. The number of the quality specification can be found in the “Quality Reference

Handbook”.

SYMBOL

PARAMETER

CONDITIONS

MIN.

MAX.

UNIT

supply voltage

TDA3664T

−

22

V

TDA3664

−

45

V

TDA3664AT

−

45

V

reverse polarity supply voltage

non-operating

−−25

V

total power dissipation

SO8

−

0.8

W

SOT223

−

5W

storage temperature

non-operating

−55

+150

°C

ambient temperature range

operating

TDA3664T

−40

+85

°C

TDA3664

−40

+125

°C

TDA3664AT

−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

SO8

155

K/W

SOT223

100

K/W

thermal resistance from junction to case (SOT223)

in free air

25

K/W