3/5/2001

1

215 Topaz Street, Milpitas, California 95035



Tel: (408) 263-3214

Fax: (408) 263-7846

www.calmicro.com

CMPWR130

CALIFORNIA MICRO DEVICES

© 2001 California Micro Devices Corp. All rights reserved. SmartOR™ is a trademark of California Micro Devices Corp

Features

• Automatic detection of V

• Glitch-free output during supply transitions

• Built-in hysteresis during supply selection

• 300mA output maximum load current

• Overload current protection

• Short circuit current protection

• Operates from either V

• 8-pin SOIC package

Product Description

that delivers up to 300mA of load current at a fixed 3.3V

output. An internal threshold level (TYP 4.1V) is used to

prevent the regulator from being operated below dropout

voltage. The device continuously monitors the input

supply and will automatically disable the regulator when

V

disabled, the control signal “Drive” (Active Low) is

enabled, which allows an external PMOS switch to

power the load from an auxiliary 3.3V supply.

Applications

• PCI adapter cards

• Network Interface Cards (NIC’s)

• Dual power systems

• Systems with standby capabilities

C1670101

When V

old, the control signal for the external PMOS switch is

disabled and the regulator is once again enabled.

All the necessary control circuitry needed to provide a

smooth and automatic transition between the supplies

has been incorporated. This allows V

switched without loss of output voltage.

PIN DIAGRAM AND APPLICATION CIRCUIT

Pin Diagram

NC

Top View

CMPWR130

8-Pin SOIC

GND

5

4

NC

6

3

NC

7

2

DRIVE

8

1

STANDARD PART ORDERING INFORMATION

Package

Ordering Part Number

Pins

Style

Tubes

Tape & Reel

Part Marking

8

SOIC

CMPWR130S/T

CMPWR130S/R

CMPWR130S

5V

GND

GND

DRIVE

MGSF1PO2ELT1

3.3V

300mA

CMPWR130

3.3V

4µF

GND

+

–

1µF

+

+

+

–

Typical Application Circuit