SPX2975(2004) 查看數據表（PDF） - Signal Processing Technologies

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SPX2975
(Rev.:2004)

400mA Low Dropout Voltage Regulator

Signal Processing Technologies 

FUNCTIONAL DIAGRAM

Temperature

Sensor

Current

Limit

VIN 1

Bandgap

Reference

4

RD

Saturation

Control &

Protection

Circuit

Buffer

5 VOUT

Reset

Generator

2 RO

3

GND

PIN NUMBER

1

2

3

4

5

PIN DESCRIPTION

PIN NAME

VIN

RO

GND

RD

VOUT

DESCRIPTION

LDO Input. Bypass VIN to GND with a Ceramic capacitor.

Reset Output. RO remains low while VOUT is below the reset switching

threshold. RO is in open conector output.

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

circuit-board ground plane to maximize thermal dissipation.

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

LDO Output. Bypass VOUT to GND with a minimum 22µF capacitor with

ESR less than 5Ω at 10kHz.

VOUT

VRD

VRO

<Trr

VthH = 1.8V

VthL = 0.4V

Td

Vth = 4.65V

Trr

VROL = 0.2V

Reset Timing

Date: 6/30/04

SPX2975 400mA Low Dropout Voltage Regulator

3

© Copyright 2004 Sipex Corporation

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