LP2956 datasheet(1/20 Pages) NSC

No. de pieza	LP2956

Descripción Electrónicos	Dual Micropower Low-Dropout Voltage Regulators

PDF	20 Pages

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Fabricante Electrónico	NSC [National Semiconductor (TI)]

Página de inicio	http://www.national.com

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LP2956/LP2956A

OBSOLETE

December 7, 2009

Dual Micropower Low-Dropout Voltage Regulators

General Description

The LP2956 is a micropower voltage regulator with very low

quiescent current (170

μA typical at light loads) and very low

dropout voltage (typically 60 mV at 1 mA load current and 470

mV at 250 mA load current on the main output).

The LP2956 retains all the desirable characteristics of the

LP2951, but offers increased output current (main output), an

auxiliary LDO adjustable regulated output (75 mA), and ad-

ditional features.

The auxiliary output is always on (regardless of main output

status), so it can be used to power memory circuits.

Quiescent current increases only slightly at dropout, which

prolongs battery life.

The error flag goes low if the main output voltage drops out

of regulation.

An open-collector auxiliary comparator is included, whose in-

verting input is tied to the 1.23V reference.

Reverse battery protection is provided.

The parts are available in DIP and surface mount packages.

Features

■ Output voltage adjusts from 1.23V to 29V

■ Guaranteed 250 mA current (main output)

■ Auxiliary LDO (75 mA) adjustable output

■ Auxiliary comparator with open-collector output

■ Shutdown pin for main output

■ Extremely low quiescent current

■ Low dropout voltage

■ Extremely tight line and load regulation

■ Very low temperature coefficient

■ Current and thermal limiting

■ Reverse battery protection

Applications

■ High-efficiency linear regulator

■ Low dropout battery-powered regulator

■ μP system regulator with switchable high-current V

CC

Block Diagram

LP2956

1133901

11339

www.national.com

11339 Version 8 Revision 4

Print Date/Time: 2009/12/07 17:53:15

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LP2956 Datasheet(PDF) 1 Page - National Semiconductor (TI)

LP2956 Datasheet(HTML) 1 Page - National Semiconductor (TI)

Número de pieza similar - LP2956

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