Advanced Monolithic Systems, Inc.

6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140

LP2950/LP2951

Low Drift Current Source

5Volt Current Limiter

SHUTDOWN

INPUT

GND

FB

V

OUT

SD

7

4

3

8

1

V

IN

+V = 2

LP2951

LOAD

30V

I

L

R

1%

1

µF

0.1

µF

+

GND

V

OUT

+V

IN

5V BUS

LP2950 -5.0

*V

1

µF

*Minimum Input-Output voltage ranges from 40mV to 400mV, depending on load

current. Current limit is typically 160 mA

5V Regulator with 2.5V Sleep Function

Open Circuit Detector for 4 to 20mA Current Loop

ERROR

ERROR

OUPUT

SHUTDOWN

INPUT

GND

FB

V

OUT

SD

7

4

3

8

1

5

+V

IN

+V

IN

LP2951

C - MOS

GATE

200kΩ

100kΩ

100kΩ

3.3µF

470kΩ

47kΩ

*SLEEP

INPUT

1%

1%

100pF

2N3906

+V

OUT

+

GND

V

OUT

+V

IN

+5V

LP2951

*OUTPUT

0.1

µF

FB

4.7k

Ω

360

1N4001

1N457

4

8

1

4

MIN. VOLTAGE

≈ 4V

20mA

7

2

1

5

4