LP2950/2951

Micrel

3-36

February 1999

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 an -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.

Absolute Maximum Ratings

If Military/Aerospace specified devices are required, contact your local

Micrel representative/distributor for availability and specifications.

Power dissipation

Internally Limited

Lead Temperature (Soldering, 5 seconds)

260

°C

Storage Temperature Range

–65

°C to +150°C

Operating Junction Temperature Range (Note 8)

LP2950, LP2951

–40

°C to +125°C

Input Supply Voltage

–0.3V to +30V

Feedback Input Voltage (Notes 9 and 10)

–1.5V to +30V

Shutdown Input Voltage (Note 9)

–0.3V to +30V

Error Comparator Output Voltage (Note 9)

–0.3V to +30V

ESD Rating is to be determined.

Ordering Information

Part Number

Voltage

Temperature Range*

Package

Accuracy

LP2950-02BZ

5.0V

–40

°C to +125°C

3-Pin TO-92 plastic

0.5%

LP2950-03BZ

5.0V

–40

°C to +125°C

3-Pin TO-92 plastic

1.0%

LP2951-02BM

5.0V

–40

°C to +125°C

8-Pin SOIC

0.5%

LP2951-03BM

5.0V

–40

°C to +125°C

8-Pin SOIC

1.0%

LP2951-02BN

5.0V

–40

°C to +125°C

8-Pin Plastic DIP

0.5%

LP2951-03BN

5.0V

–40

°C to +125°C

8-Pin Plastic DIP

1.0%

LP2951-4.8BM

4.85V

–40

°C to +125°C

8-Pin SOIC

1.0%

* Junction temperatures