LP2951A

© 1998 SEMTECH CORP.

150mA ADJUSTABLE

VOLTAGE REGULATOR

March 17, 1998

652 MITCHELL ROAD NEWBURY PARK CA 91320

1

DESCRIPTION

The LP2951A is an improved version of the LP2951

and features tighter tolerance on the output voltage

and reference voltage specifications. Both the LP2951

and LP2951A feature 150mA output current capability.

The LP2951 series of low power voltage regulators

have low quiescent current and low dropout voltage.

The quiescent current increases minimally during

dropout conditions thereby extending battery life.

Available in the eight lead SOIC package, the LP2951

series includes features such as shutdown and low

output voltage detect (typically due to low battery con-

ditions) . This function may also be used as a power on

reset function when triggered by CMOS or TTL inputs.

The circuit can be used as a fixed voltage 5 volt regula-

tor or adjusted between 1.24 volts and 29 volts using

external resistor pairs.

FEATURES

AS2951AC

APPLICATIONS

TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com

BLOCK DIAGRAM

PIN CONFIGURATION

ABSOLUTE MAXIMUM RATINGS

Parameter

Symbol

Maximum

Units

Supply Voltage

V

IN

-0.3 to 30

V

Shutdown Input

Voltage

-0.3 to 30

V

Error Comp. Output

Voltage

-0.3 to 30

V

Power Dissipation

P

D

Internally

Limited

W

Operating Junction

Temperature Range

T

J

-40 to 125

°C

Storage

Temperature Range

T

STG

-65 to 150

°C

Lead Temperature

(Soldering) 5 Sec

T

LEAD

260

°C

ORDERING INFORMATION

Note:

(1) Add suffix ‘TR’ for tape and reel.

DEVICE

(1)

V

PACKAGE

LP2951ACM

ADJ

SO-8