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CMPWR101

250 mA SmartOR Regulator with VAUX Switch

ON Semiconductor 

CMPWR101

250 mA SmartORt Regulator

with VAUX Switch

Product Description

The ON Semiconductor’s SmartORt CMPWR101 is a low dropout

regulator that delivers up to 250 mA of load current at a fixed 3.3 V

output. An internal threshold level (typically 4.1 V) 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 VCC falls below the threshold level. When the

regulator is disabled, a low impedance, fully integrated switch is

enabled which allows the output to be directly powered from an

auxiliary 3.3 V supply.

When VCC is restored to a level above the select threshold, the low

impedance 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 VCC to be dynamically switched without loss of output voltage.

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.

Features

• Automatic Detection of VCC Input Supply

• Glitch−Free Output During Supply Transitions

• Built−In Hysteresis During Supply Selection

• 250 mA Output Maximum Load Current

• Fully Integrated VAUX Switch

• Overload Current Protection

• Short Circuit Current Protection

• Operates from Either VCC or VAUX

• 8−Pin SOIC Package

• These Devices are Pb−Free and are RoHS Compliant

Applications

• PCI Adapter Cards

• Network Interface Cards (NICs)

• Dual Power Systems

• Systems with Standby Capabilities

http://onsemi.com

SIOC 8

R SUFFIX

CASE 751BD

MARKING DIAGRAM

CMPWR 101R

CMPWR 101R = CMPWR101R

ORDERING INFORMATION

Device

CMPWR101R

Package

Shipping†

SOIC 2500/Tape & Reel

(Pb−Free)

†For information on tape and reel specifications,

including part orientation and tape sizes, please

refer to our Tape and Reel Packaging Specification

Brochure, BRD8011/D.

© Semiconductor Components Industries, LLC, 2011

1

April, 2011 − Rev. 4

Publication Order Number:

CMPWR101/D

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