3

Date: 6/30/04

SPX2975 400mA Low Dropout Voltage Regulator

© Copyright 2004 Sipex Corporation

PIN DESCRIPTION

PIN NUMBER

PIN NAME

DESCRIPTION

1V

IN

LDO Input. Bypass V

2RO

Reset Output. RO remains low while V

threshold. RO is in open conector output.

3

GND

Ground. This pin also functions as a heatsink. Solder to large pads or the

circuit-board ground plane to maximize thermal dissipation.

4RD

Reset Delay. RD connects capacitor to GND for setting delay time.

5V

OUT

LDO Output. Bypass V

ESR less than 5Ω at 10kHz.

Buffer

Temperature

Sensor

Current

Limit

Bandgap

Reference

4

1

RD

Saturation

Control &

Protection

Circuit

Reset

Generator

3

GND

2

RO

5

FUNCTIONAL DIAGRAM

Td

<Trr

Trr

Reset Timing