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SC4211

Very Low Input /Very Low Dropout

1 Amp Regulator With Enable

POWER MANAGEMENT

POWER MANAGEMENT

Revision: November 06, 2008

The SC4211 is a high performance positive voltage

regulator designed for use in applications requiring very

low Input voltage and very low dropout voltage at up to

1 amperes. It operates with a Vin as low as 1.4V, with

output voltage programmable as low as 0.5V. The

SC4211 features ultra low dropout, ideal for applications

where Vout is very close to Vin. Additionally, the SC4211

has an enable pin to further reduce power dissipation

while shutdown. The SC4211 provides excellent regula-

tion over variations in line, load and temperature.

The SC4211 is available in the SOIC-8-EDP (Exposed Die

Pad) package. Depending on how the FB pin is config-

ured, the output voltage can be either externally adjusted

or fixed to either 0.5V or 1V.

Input Voltage as low as 1.4V

400mV dropout @ 1A

Adjustable output from 0.5V

Over current and over temperature protection

Enable pin

10µA quiescent current in shutdown

Full industrial temperature range

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

WEEE and RoHS compliant

Telecom/Networking cards

Motherboards/Peripheral cards

Industrial Applications

Wireless infrastructure

Set top boxes

Medical equipment

Notebook computers

Battery powered systems

Volts

R2

R2)

(R1

0.5

VO

+

=

Description

Features

Applications

Typical Application Circuits

C2

U1

SC4211

4

3

2

8

1

5

6

7

NC

VIN

EN

GND

NC

NC

VO

FB

VO = 1V

VIN

C1

ENABLE

C2

U1

4

3

2

8

1

5

6

7

NC

VIN

EN

GND

NC

NC

VO

FB

VO = 0.5V

VIN

C1

ENABLE

SC4211

ENABLE

C1

R2

VIN

R1

U1

SC4211

4

3

2

8

1

5

6

7

NC

VIN

EN

GND

NC

NC

VO

FB

VO

C2