TPPM0302

400-mA LOW-DROPOUT REGULATOR

WITH AUXILIARY POWER MANAGEMENT AND POK

SLVS316 – NOVEMBER 2000

2

POST OFFICE BOX 655303

functional block diagram

5VCC

5-V

Detection

Current

Sensor

Linear Regulator

With LDO

Gate Drive

and Control

Over

Temperature

3.3VOUT

5VAUX

5VAUX

Detection

Current

Sensor

Gate Drive

and Control

GND

3.3VAUX

3VAUX

Detection

Current

Sensor

Low ON

Resistance

Switch

Gate Drive

5-V Detection

and Control

POK

Reset

Voltage

Supervisor

3.3VOUT

Linear Regulator

With LDO

Terminal Functions

TERMINAL

I/O

DESCRIPTION

NAME

NO.

I/O

DESCRIPTION

3.3VAUX

4

I

3.3-V auxiliary input

3.3VOUT

3

O

3.3-V output with a typical capacitance load of 4.7

µF

5VAUX

1

I

5-V auxiliary input

5VCC

2

I

5-V main input

GND

7

I

Ground

NC

6, 8

I

No internal connection

POK

5

O

Power OK