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POWER MANAGEMENT

Description

The SC4215A 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 2

amp. It operates with a Vin as low as 1.4V, with output

voltage programmable as low as 0.5V. The SC4215A fea-

tures ultra low dropout, ideal for applications where Vout

is very close to Vin. Additionally, the SC4215A has an en-

able pin to further reduce power dissipation while shut-

down. The SC4215A provides excellent regulation over

variations in line, load and temperature.

The SC4215A is available in the SOIC-8EDP (Exposed Die

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

nal divider or to 0.5V depending on how the FB pin is con-

figured.

Very Low Input /Very Low Dropout

2 Amp Regulator With Enable

Features

Input Voltage as low as 1.4V

500mV dropout @ 2A

Adjustable output from 0.5V to 3.3V

Over current and over temperature protection

Enable pin

10碌A(chǔ) quiescent current in shutdown

Low reverse leakage (output to input)

Full industrial temperature range

Available in SOIC-8EDP package

SC4215A

Applications

Telecom/Networking cards

Motherboards/Peripheral cards

Industrial applications

Wireless infrastructure

Set top boxes

Medical equipment

Notebook computers

Battery powered systems

Typical Application Circuits

U1

4

NC

VIN

EN

NC

NC

VO

FB

GND

5

6

7

8

VIN

ENABLE

3

2

1

VO

R1

VO

C2

=

0.5 (R1

+

R2)

R2

Volts

SC4215A

C1

R2

U1

4

NC

VIN

EN

NC

NC

VO

FB

GND

5

6

7

8

4

NC

VIN

EN

NC

U1

NC

VO

FB

GND

5

6

7

8

VIN

ENABLE

3

2

1

VO

VIN

ENABLE

3

2

1

VO

VO

=

0.5V

VO

=

1V

SC4215A

C1

C2

C1

SC4215A

C2

Revision April 29, 2005

1

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