MIC2950/2951

Micrel

3-50

February 1999

Pin Description

Pin #

Pin #

Pin Name

Pin Function

MIC2950

MIC2951

3

1

OUT

Regulated Output

2

SNS

Sense (Input): Output-voltage sensing end of internal voltage divider for

fixed 5V operation. Not used in adjustable configuration.

3

SHDN

Shutdown/Enable (Input): TTL compatible input. High = shutdown,

low or open = enable.

2

4

GND

Ground

5

ERR

Error Flag (Output): Active low, open-collector output (low = error,

floating = normal).

6

TAP

3.3V/4.85/5V Tap: Output of internal voltage divider when the regulator is

configured for fixed operation. Not used in adjustable configuration.

7

FB

Feedback (Input): 1.235V feedback from internal voltage divider’s TAP (for

fixed operation) or external resistor network (adjustable configuration).

1

8

IN

Unregulated Supply Input

Pin Configuration

1

2

3

4

8

7

6

5

IN

FB

TAP

ERR

OUT

SNS

SHDN

GND

MIC2951-xx

DIP (N), SOIC (M), MM8™ (MM)

(Top View)

32

1

OUT

GND

IN

MIC2950-xx

TO-92 (Z)

(Bottom View)

Ordering Information

Part Number

Voltage

Accuracy Temperature Range*

Package

MIC2950-05BZ

5.0V

0.5%

–40

°C to +125°C

TO-92

MIC2950-06BZ

5.0V

1.0%

–40

°C to +125°C

TO-92

MIC2951-02BM

5.0V

0.5%

–40

°C to +125°C

8-pin SOIC

MIC2951-03BM

5.0V

1.0%

–40

°C to +125°C

8-pin SOIC

MIC2951-02BN

5.0V

0.5%

–40

°C to +125°C

8-pin plastic DIP

MIC2951-03BN

5.0V

1.0%

–40

°C to +125°C

8-pin plastic DIP

MIC2951-03BMM

5.0V

1.0%

–40

°C to +125°C

8-lead MM8™

MIC2951-3.3BM

3.3V

1.0%

–40

°C to +125°C

8-pin SOIC

MIC2951-4.8BM

4.85V

1.0%

–40

°C to +125°C

8-pin SOIC

* junction temperature

The MIC2950 is available as either an -05 or -06 version. The

-05 and -06 versions are guaranteed for junction temperatures

from –40

°C to +125°C; the -05 version has a tighter output and

reference voltage specification range over temperature. The

MIC2951 is available as an -02 or -03 version.

The MIC2950 and MIC2951 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 (0.04% typical). This

greatly reduces the error in the overall circuit, and is the result

of careful design techniques and process control.