RC2951M

RC2951M Datasheet

RC2951

Part	Datasheet
RC2951M	RC2951M (pdf)

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RC2951 Adjustable Micropower Voltage Regulator • High accuracy output voltage • Guaranteed 100 mA output current • Extremely low quiescent current • Extremely tight load and line regulation • Requires only a 1.0mF output capacitor for stability • Internal Current and Thermal Limiting • Error warns of output dropout • Logic-controlled electronic shutdown • Output programmable from to 29V • Fixed 3.3V version available • 8 lead SOIC package The RC2951 is a voltage regulator 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 75mA and is capable of supplying output currents in excess of 100mA. It has internal current and thermal limiting protection. The output can be programmed from 1.24V to 29V with two external resistors. A output voltage 3.3V is also available. The error 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. Preliminary Information Block Diagram Unregulated DC Feed- Back 8 Input 1 Output From CMOS or TTL Shut Down Error Amplifier 60 mV + 1.23V Reference Error Detection Comparator VOUT IL 100 mA 2 Sense 6 VTAP Error 4 Ground + See Application Discussion To CMOS or TTL PRELIMINARY INFORMATION describes products that are not in ffuullll and limited characterization. They may change without notice. Contact RFaaiyrcthheilodnSfeomr cicuornrednutcitnofrofromractuiornre. nt information. Preliminary Information RC2951 Pin Assignments 8 Lead SOIC Package PRODUCT SPECIFICATION Output Sense Shutdown Ground Input Feedback VTAP Error Top View Ordering Information Product Number RC2951M-3.3 Package 8 pin SOIC 8 pin SOIC PRODUCT SPECIFICATION Preliminary Information LIFE SUPPORT POLICY FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: Life support devices or systems are devices or systems which, a are intended for surgical implant into the body, or b support or sustain life, and c whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user. A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. 5/20/98 0.0m 001 Stock#DS30002951 1998 Fairchild Semiconductor Corporation

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RC2951

Adjustable Micropower Voltage Regulator
• High accuracy output voltage
• Guaranteed 100 mA output current
• Extremely low quiescent current
• Extremely tight load and line regulation
• Requires only a 1.0mF output capacitor for stability
• Internal Current and Thermal Limiting
• Error warns of output dropout
• Logic-controlled electronic shutdown
• Output programmable from to 29V
• Fixed 3.3V version available
• 8 lead SOIC package

The RC2951 is a voltage regulator 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 75mA and is capable of supplying output currents in excess of 100mA. It has internal current and thermal limiting protection. The output can be programmed from 1.24V to 29V with two external resistors. A output voltage 3.3V is also available.

The error 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.

Preliminary Information

Block Diagram

Unregulated DC

Feed-

Back
8 Input
1 Output

From CMOS or TTL

Shut Down

Error Amplifier
60 mV
+ 1.23V

Reference

Error Detection Comparator

VOUT IL 100 mA
2 Sense
6 VTAP

Error 4

Ground
+ See Application Discussion

To CMOS or TTL

PRELIMINARY INFORMATION describes products that are not in ffuullll and limited characterization. They may change without notice. Contact RFaaiyrcthheilodnSfeomr cicuornrednutcitnofrofromractuiornre. nt information.

Preliminary Information

RC2951

Pin Assignments
8 Lead SOIC Package

PRODUCT SPECIFICATION

Output

Sense

Shutdown

Ground

Input

Feedback

VTAP

Error

Top View
Ordering Information

Product Number RC2951M-3.3

Package 8 pin SOIC 8 pin SOIC

PRODUCT SPECIFICATION

Preliminary Information

LIFE SUPPORT POLICY

FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein:

Life support devices or systems are devices or systems which, a are intended for surgical implant into the body, or b support or sustain life, and c whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user.

A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness.
5/20/98 0.0m 001 Stock#DS30002951 1998 Fairchild Semiconductor Corporation

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived RC2951M Datasheet file may be downloaded here without warranties.

Datasheet ID: RC2951M 634559