CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025

LP2950 / LP2951

CORPORATION

TYPICAL APPLICATIONS (continued)

+V

IN

LP2951

FB

4

1F-48

GND

8

5

SYSTEM OVER TEMPERATURE PROTECTION CIRCUIT

AUX SHUTDOWN

INPUT

+V

IN

AS35

5 DEGREE SHUTDOWN FLAG

1

EXTERNAL CIRCUIT

PROTECTED FROM

OVER TEMPERATURE

(V+ GOES OFF WHEN

TEMP > 125)

OR

TEMP

SENSOR

7

+

–

3

ERROR

SD

10K

Ω

ON

OFF

RELAY

8.2K

Ω

LP2951

4

1F-49

GND

8

1

OPEN CIRCUIT DETECTOR FOR 4mA TO 20mA CURRENT LOOP

7

FB

2

4

20mA

IN4001

360K

Ω

0.1

µF

IN457

OUTPUT

4.7mA

+5v

MIN VOLTAGE = 4V

+V

IN

V

OUT

LP2951

4.7

µF

LOAD 50mA

TO 300mA

OUTPUT

5V

1

2

SENSE

GND

5

UNREGULATED INPUT

3

300mA REGULATOR WITH 0.75 DROPOUT

74

2N5432

27K

Ω

330K

Ω

IN

1F-50

V

TAP

FB

V

OUT

+