Micrel, Inc.

LP2950/2951

September 2008

2

M9999-091208

Additional features available with the LP2951 also

include an error flag output that warns of a low output

voltage, which is often due to failing batteries on the

input. This may also be used as a power-on reset. A

logic-compatible shutdown input is also available which

enables the regulator to be switched on and off. This

part may also be pin-strapped for a 5V output, or

programmed from 1.24V to 29V with the use of two

external resistors.

The LP2950 is available as either a -02 or -03 version.

The -02 and -03 versions are guaranteed for junction

temperatures from –40°C to +125°C; the -02 version has

a tighter output and reference voltage specification

range over temperature. The LP2951 is available as an

-02 or -03 version.

The LP2950 and LP2951 have a tight initial tolerance

(0.5% typical), a very low output voltage temperature

coefficient which allows use as a low-power voltage

reference, and extremely good load and line regulation

(0.05% typical). This greatly reduces the error in the

overall circuit, and is the result of careful design

techniques and process control.

___________________________________________________________________________________________________________

Ordering Information

Part Number

Voltage

Accuracy

Junction

Temperature Range

Package

Lead Finish

LP2950-02BZ*

5.0V

0.5%

–40° to +125°C

3-Pin TO-92 Plastic

Standard

LP2950-03BZ*

5.0V

1.0%

–40° to +125°C

3-Pin TO-92 Plastic

Standard

LP2951-02BM

5.0V

0.5%

–40° to +125°C

8-Pin SOIC

Standard

LP2951-03BM

5.0V

1.0%

–40° to +125°C

8-Pin SOIC

Standard

LP2951-02BN

5.0V

0.5%

–40° to +125°C

8-Pin Plastic DIP

Standard

LP2951-03BN**

5.0V

1.0%

–40° to +125°C

8-Pin Plastic DIP

Standard

LP2951-02YM

5.0V

0.5%

–40° to +125°C

8-Pin SOIC

Pb-Free

LP2951-03YM

5.0V

1.0%

–40° to +125°C

8-Pin SOIC

Pb-Free

LP2951-02YN

5.0V

0.5%

–40° to +125°C

8-Pin Plastic DIP

Pb-Free

Note:

* TO-92 Package discontinuance notification issued September 2007. End-of-life-buy offer thru December 31, 2007. Contact factory for

additional information.

** Contact factory for Pb-Free version.

Pin Configuration

TO-92 (Z)

(Bottom View)

DIP (N) and SOIC (M)

See MIC2950 for a part with: 1) higher output (150mA), 2) transient protection (60V), and 3) reverse input protection to –20V.