CMPWR101

©2010 SCILLC. All rights reserved.

Publication Order Number:

June 2010 Rev. 3

CMPWR101/D

Features

•

Automatic detection of V

•

Glitch-free output during supply transitions

•

Built-in hysteresis during supply selection

•

250mA output maximum load current

•

Fully integrated V

•

Overload current protection

•

Short circuit current protection

•

Operates from either V

•

8-pin SOIC package

•

RoHS compliant (lead-free) finishing

Applications

•

PCI adapter cards

•

Network Interface Cards (NICs)

•

Dual power systems

•

Systems with standby capabilities

Product Description

The California Micro Devices’ SmartOR

TM

CMPWR101 is a low dropout regulator that delivers up to

250mA of load current at a fixed 3.3V output. An internal threshold level (typically 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

regulator is disabled, a low impedance, fully integrated switch is enabled which allows the output to be

directly powered from an auxiliary 3.3V supply.

When V

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

An output logic signal, DRIVE, is active LOW whenever the internal regulator is disabled.

The CMPWR101 is housed in a 8-pin SOIC package and is available with RoHS compliant lead-free

finishing.