© 2009 Semtech Corporation

POWER MANAGEMENT



SC4216H

Very Low Input /Very Low Dropout

3 Amp Regulator With Enable

Features

Input Voltage as low as .45V

500mV dropout @ 3A

Adjustable output from 0.5V

Over current and over temperature protection

Enable pin

0µA quiescent current in shutdown

Full industrial temperature range

Available in SOIC-8-EDP Lead-free package, fully WEEE

and RoHS compliant

Applications

Telecom/Networking cards

Motherboards/Peripheral cards

Industrial applications

Wireless infrastructure

Set top boxes

Medical equipment

Notebook computers

Battery powered systems

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Description

The SC426H is a high performance positive voltage regu-

lator designed for use in applications requiring very low

input voltage and very low dropout voltage at up to 3

amperes. It operates with a Vin as low as .45V, with output

voltage programmable as low as 0.5V. The SC426H fea-

tures ultra low dropout, ideal for applications where Vout

is very close to Vin. Additionally, the SC426H has an

enable pin to further reduce power dissipation while shut-

down. The SC426H provides excellent regulation over

variations in line, load and temperature.

The SC426H is available in the SOIC-8-EDP (Exposed Die

Pad) package. The output voltage can be set via an exter-

nal divider or to a fixed setting of 0.5V depending on how

the FB pin is configured.

Typical Application Circuit

February 3, 2009