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RC2951

Adjustable Micropower Voltage Regulator

Features

鈥?/div>

High accuracy output voltage

Guaranteed 100 mA output current

Extremely low quiescent current

Extremely tight load and line regulation

Requires only a 1.0碌F output capacitor for stability

Internal Current and Thermal Limiting

Error 鏗俛g warns of output dropout

Logic-controlled electronic shutdown

Output programmable from 1.24 to 29V

Fixed 3.3V version available

-25擄C to +85擄C operating range

8 lead SOIC package

Description

The RC2951 is a voltage regulator speci鏗乧ally designed to

maintain proper regulation with a very low dropout voltage

(Typ. 40mV at light loads and 380 mV at 100mA). It has a

low quiescent bias current of 75碌A(chǔ) and is capable of supply-

ing output currents in excess of 100mA. It has internal cur-

rent and thermal limiting protection. The output can be

programmed from 1.24V to 29V with two external resistors.

A 鏗亁ed output voltage (3.3V) is also available.

The error 鏗俛g output can be used as power-on reset for

warning of a low output voltage. The Shutdown input feature

allows a logic level signal to turn on and off the regulator

output. The RC2951 is ideally suited for battery powered

computer, consumer, and industrial equipment where an

extension of useful battery life is desirable. The RC2951 is

available in an 8-pin SOIC package.

Block Diagram

Unregulated DC

7

+

Feed-

Back

8

Input

1

Output

2

+

鈥?/div>

From

CMOS

or TTL

3

Shut

Down

+

60 mV

+

1.23V

Reference

鈥?/div>

Error

4

Ground

Error Detection Comparator

To CMOS

or TTL

Error

Amplifier

6

V

TAP

5

330k鈩?/div>

+

See Application

Discussion

Sense

V

OUT

I

L

鈮?/div>

100 mA

PRELIMINARY INFORMATION

describes products that are not in full production at the time of printing. Specifications are based on design goals

REV. 1.0.1 4/8/02

and limited characterization. They may change without notice. Contact Raytheon for current information.

型號

版本

描述

廠商

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RC2951

英文版

Adjustable Micropower Voltage Regulator

FAIRCHILD

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英文版

Adjustable Micropower Voltage Regulator

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RC2951 Datasheet

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