LP2950AS Просмотр технического описания (PDF) - Signal Processing Technologies

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LP2950AS

100 mA Low Dropout Voltage Regulators

Signal Processing Technologies 

TYPICAL APPLICATIONS (continued)

LP2950/LP2951

+V IN

AUX SHUTDOW

INPUT

OFF

ON

3 SD

8

+VIN _______ 5

ERROR

LP2951

10K Ω ..

5 DEGREE SHUTDOWN FLAG

1

V OUT

TEMP

SENSOR

+

AS35

-

GND

4

FB

7

8.2KΩ ..

EXTERNAL CIRCUIT

PROTECTED FROM

OVER TEMPERATURE

(V+ GOES OFF WHEN

TEMP > 125)

Fig 6. System Over Temperature Protection

OR

RELAY

4

20mA

1N4001

0.1uF

8

+V IN

1

V OUT

LP2951

7

FB

+5V

4.7mA

OUTPUT

2

GND

4

1N457

360K Ω ..

Fig. 7

MIN VOLTAGE = 4V

Open Circuit Detector for 4mA to 20mA Current Loop

UNREGULATED INPUT

5

IN

1

V OUT

LP2951

3

V TAP

FB

7

2

SENSE

GND

4

330KΩ ..

27KΩ ..

+

4.7uF

2N5432

5V

OUTPUT

LOAD

50mA

TO

300 mA

Fig 8. 300 mA Regulator with 0.75V

Rev. 11/2/00

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