Advanced Monolithic Systems, Inc.

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

Advanced

AMS1508

Monolithic

8A LOW DROPOUT VOLTAGE REGULATOR

Systems

FEATURES

APPLICATIONS

•• Adjustable or Fixed Output

•• High Current Regulators

1.5V, 2.5V, 2.85V, 3.0V, 3.3V, 3.5V and 5.0V

•• Post Regulators for Switching Supplies

•• Output Current of 8A

•• Microprocessor Supply

•• Low Dropout, 500mV at 8A Output Current

•• Adjustable Power Supply

•• Fast Transient Response

•• Notebook/Personal Computer Supplies

•• Remote Sense

GENERAL DESCRIPTION

The

The AMS1508 series of adjustable and fixed low dropout voltage regulators are designed to provide 8A output current to

power the new generation of microprocessors. The dropout voltage of the device is 100mV at light loads and rising to 500mV

at maximum output current. A second low current input voltage 1V or greater then the output voltage is required to achieve

this dropout. The AMS1508 can also be used as a single supply device.

New features have been added to the AMS1508: a remote Sense pin is brought out virtually eliminating output voltage

variations due to load changes. The typical load regulation, measured at the Sense pin, for a load current step of 100mA to 8A

is less than 1mV.

The AMS1508 series has fast transient response. The Adjust pin is brought out on fixed devices. To further improve the

transient response the addition of a small capacitor on the Adjust pin is recommended.

The AMS1508 series are ideal for generating processor supplies of 2V to 3V on motherboards where both 5V and 3.3V

supplies are available.

The AMS1508 devices are offered in 5 lead TO-220 and TO-263 (plastic DD) packages and in the 7 lead TO-220 package.

ORDERING INFORMATION:

PIN CONNECTIONS

PACKAGE TYPE

OPERATING JUNCTION

5 LEAD TO-263

5 LEAD TO-220

7 LEAD TO-220 TEMPERATURE RANGE

AMS1508CM

AMS1508CT

AMS1508CT-1.5

0 to 125

° C

AMS1508CM-1.5

AMS1508CT-1.5

AMS1508CT-2.5

0 to 125

° C

AMS1508CM-2.5

AMS1508CT-2.5

AMS1508CT-2.85

0 to 125

° C

AMS1508CM-2.85 AMS1508CT-2.85 AMS1508CT-3.0

0 to 125

° C

AMS1508CM-3.0

AMS1508CT-3.0

AMS1508CT-3.3

0 to 125

° C

AMS1508CM-3.3

AMS1508CT-3.3

AMS1508CT-3.5

0 to 125

° C

AMS1508CM-3.5

AMS1508CT-3.5

AMS1508CT-5.0

0 to 125

° C

AMS1508CM-5.0

AMS1508CT-5.0

0 to 125

° C

5

4

3

2

1

V

POWER

V

CONTROL

OUTPUT

ADJUST/GND

SENSE

FRONT VIEW

5 LEAD TO-220

7

6

5

4

3

2

1

NC

Vpower

ADJUST

OUTPUT

Vcontrol

GND

SENSE

7 LEAD TO-220

FRONT VIEW

5

4

3

2

1

Vpower

Vcontrol

OUTPUT

ADJUST/GND

SENSE

FRONT VIEW

5 LEAD TO-263