LP2950AC 데이터 시트보기 (PDF) - Signal Processing Technologies

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LP2950AC

100mA Low Dropout Voltage Regulators

Signal Processing Technologies 

TYPICAL APPLICATIONS (continued)

LP2950/LP2951

+V IN

AUX SHUTDOW

INPUT

OFF

ON

3 SD

8

+V IN _______ 5

ERROR

LP2951

1

V OUT

10K Ω.

5 DEGR.EE SHUTDOWN FLAG

GND

+

4

TEMP

SENSOR

AS35

-

FB

7

8.2K Ω

EXTERNAL CIRCUIT

PROTECTED FROM

OVER TEMPERATURE

(V+ GOES OFF WHEN

TEMP > 125)

OR

RELAY

Figure 7. System Over Temperature Protection

4

20mA

1N4001

0.1µF

+5V

4.7mA

8

+V IN

1

V OUT

LP2951

7

FB

OUTPUT

2

GND

4

1N457

MIN VOLTAGE = 4V

360K Ω

Figure 8. Open Circuit Detector for 4mA to 20mA Current

Loop

UNREGULATED INPUT

8

IN

1

V OUT

LP2951

6

V TAP

FB

7

2

SENSE

GND

4

330KΩ

27KΩ

+ 4.7µF

2N5432

(2)

5V

OUTPUT

LOAD

50mA

TO

300 mA

Figure 9. 300mA Regulator with 0.75V

Rev. 8/10/01

LP2950/51 100mA Low Dropout Voltage Regulators

11

©Copyright 2001 Sipex Corporation

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