Advanced Monolithic Systems, Inc.

6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140

Advanced

AMS317

Monolithic

1A LOW DROPOUT VOLTAGE REGULATOR

Systems

FEATURES

APPLICATIONS

•• Three Terminal Adjustable or Fixed Voltages*

•• High Efficiency Linear Regulators

1.8V, 2.5V, 2.85V, 3.3V and 5.0V

•• Post Regulators for Switching Supplies

•• Output Current of 1A

•• 5V to 3.3V Linear Regulator

•• Operates Down to 1V Dropout

•• Battery Chargers

•• Line Regulation: 0.2% Max.

•• Active SCSI Terminators

•• Load Regulation: 0.4% Max.

•• Power Management for Notebook

••TO-220, TO-263, TO-252 and SOT-223 package available

•• Battery Powered Instrumentation

GENERAL DESCRIPTION

The

The AMS317 series of adjustable and fixed voltage regulators are designed to provide 1A output current and to operate down

to 1V input-to-output differential. The dropout voltage of the device is guaranteed maximum 1.3V at maximum output

current, decreasing at lower load currents.

On-chip trimming adjusts the reference voltage to 1%. Current limit is also trimmed, minimizing the stress under overload

conditions on both the regulator and power source circuitry.

The AMS317 devices are pin compatible with other three-terminal regulators and are offered in 3 lead TO-220 package, in

the 2 & 3 Lead TO-263 (Plastic DD), in the TO-252 (D PAK) and in the low profile surface mount SOT-223 package.

ORDERING INFORMATION:

OUTPUT

PACKAGE TYPE

OPERATING JUNCTION

VOLTAGE

3 Lead TO-220

2 &3 Lead TO-263

TO-252

SOT-223

TEMPERATURE RANGE

ADJUSTABLE AMS317ACT

AMS317ACM

AMS317ACD

AMS317A

-40 to +125

° C

AMS317CT

AMS317CM

AMS317CD

AMS317

0 to 125

° C

FIXED*

AMS317ACT-X

AMS317ACM-X

AMS317ACD-X

AMS317A-X

-40 to +125

° C

AMS317CT-X

AMS317CM-X

AMS317CD-X

AMS317-X

0 to 125

° C

X= 1.8V, 2.5V, 2.85V, 3.3V and 5.0V.

*For additional available fixed voltages contact factory.

PIN CONNECTIONS

FIXED VERSION

ADJUSTABLE VERSION

1- Ground

1- Adjust

SOT-223 Top View

1

2

3

TAB IS

OUTPUT

TO-252 FRONT VIEW

1

2

3

1

2

3

TAB IS

OUTPUT

TO-263 FRONT VIEW

1

2

3

TAB IS

OUTPUT

2L TO-263 FRONT VIEW

1

2

3

TAB IS

OUTPUT

TO-220 FRONT VIEW