LP2951-4.8 View Datasheet(PDF) - Micrel

Part Name

Description

View to exact match

LP2951-4.8

100mA Low-Dropout Voltage Regulator

Micrel 

LP2950/2951

+V IN

8

470k

+V IN

5

ERROR

470k

VOUT 1

3

SD

RESET

LP2951

GND

7

FB

4

VOUT

R1

+

1µF

R2

Latch Off When Error Flag Occurs

Micrel

4

20mA

1N

4001

0.1µF

8

VIN

VOUT 1

MIC2951

7

FB

GND

4

1N457

+5V

4.7mA

OUTPUT*

1

5

4

2

* HIGH FOR

360 IL < 3.5mA

MIN. VOLTAGE 4V

Open Circuit Detector for 4mA to 20mA Current Loop

8

2

39kΩ

+VIN SENSE

5 ERROR

VOUT 1

RESET

LP2951

–

C4

3 SD

+

FB 7

39kΩ GND TAP

4

6

+VOUT = 5V

+

1µF

+ 6V

LEAD-

1%

100

kΩ

ACID

BATTERY

1%

1

kΩ

C1-C4

LP339

1%

1

kΩ

–

100kΩ

C1

+

<5.8V**

–

100kΩ

C2

+

<6.0V**

–

100kΩ

C3

+

<6.2V**

10kΩ

R3

1% 20kΩ

*OPTIONAL LATCH OFF WHEN DROP OUT OCCURS. ADJUST R3 FOR C2

SWITCHING WHEN VIN IS 6.0V

**OUTPUTS GO LOW WHEN VIN DROPS BELOW DESIGNATED THRESHOLDS.

Regulator with State-of-Charge Indicator

3-46

February 1999

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