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Product data sheet

Rev. 05 — 13 June 2005

3 of 17

Philips Semiconductors

TDA3663

Very low dropout voltage/quiescent current 3.3 V voltage regulator

6.2 Pin description

[1]

For he SO8 package all GND pins are connected to the lead frame and can also be used to reduce the total

the PCB acts like a heat spreader.

7.

Functional description

The TDA3663 is a fixed 3.3 V regulator which can deliver output currents up to 100 mA.

The regulator is available in SO8 and SO4 packages. The regulator is intended for

portable, mains and telephone 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 device remains operational 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.

8.

Limiting values

Table 3:

Pin description

Symbol

Pin

Description

SO4

SO8

1

8

supply voltage

GND

2 and 4

2, 3, 6 and 8

ground [1]

REG

3

1

regulator output

n.c.

-

4 and 5

not connected

Table 4:

Limiting values

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

Symbol

Parameter

Conditions

Min

Max

Unit

supply voltage

-

45

V

reverse polarity supply

voltage

non-operating

-

−25

V

total power dissipation

TDA3663

temperature of copper

area is 25

°C

-

4.1

W

TDA3663AT

5

W

storage temperature

non-operating

−55

+150

°C

ambient temperature

operating

−40

+125

°C

junction temperature

operating

−40

+150

°C