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SS8061G

1/21/2005 Rev.2.01

1A Low Dropout Regulator with Enable

FEATURES

Adjustable output from 1.2V to 4.8V

Output voltage options 1.5V, 1.8V and 2.5V

(externally adjustable using resistors)

Over-current and over-temperature protection

Dropout voltage of 400mV at 1A load

Enable pin

Quiescent current of 10µA in shutdown

SOT-89-5 Package

APPLICATIONS

Battery-powered systems

Motherboards

Peripheral cards

Network cards

Set Top Boxes

Medical Equipment

Notebook Computers

DESCRIPTION

The

SS8061 is a high performance positive voltage

regulator designed for use in applications requiring

very low dropout voltage at up to 1 Amps. Since it has

superior dropout characteristics compared to regular

LDOs, it can be used to supply 2.5V on motherboards

or 1.5V, 1.8V on peripheral cards from the 3.3V supply

thus allowing the elimination of costly heatsinks. An

enable

-pin further reduces power dissipation while in

shut

-down. The SS8061 provides excellent regulation

over variations in line, load and temperature.

The

SS8061 is available with 1.5V, 1.8V and 2.5V

internally preset outputs that are also adjustable using

external resistors.

VEN

VIN

VO

R1

R2

VEN

VIN

VO

ADJ

GND

1.2 (R1+R2)

VO =

R2

Volts

VO

ADJ

1

23

5

4

GND

VEN

VIN

C1

22µF

C2

47µF

R2=12k

Ω is recommended

R3 should be connected for current I

ENH

restriction as V

R3

I

ENH

VEN

VIN

VO

R1

R2

VEN

VIN

VO

ADJ

GND

SS8061G

1.2 (R1+R2)

VO =

R2

Volts

VO

ADJ

SOT-89-5

SS8061G

1

23

5

4

GND

VEN

VIN

C1

22µF

C2

47µF

R2=12k

Ω is recommended

R3 should be connected for current I

ENH

restriction as V

R3

I

ENH

PIN CONFIGURATION

TYPICAL APPLICATION CIRCUIT

SS8061-15GTETR

1.5V output, in SOT89-5 with Pb-free lead finish, shipped on tape and reel.

SS8061-18GTETR

1.8V output, in SOT89-5 with Pb-free lead finish, shipped on tape and reel.

SS8061-25GTETR

2.5V output, in SOT89-5 with Pb-free lead finish, shipped on tape and reel.

ORDERING INFORMATION

This device is only available with Pb-free lead finish (second-level interconnect).