SPX2954A(2003) 查看數據表（PDF） - Signal Processing Technologies

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SPX2954A
(Rev.:2003)

250mA Low Dropout Voltage Regulator

Signal Processing Technologies 

APPLICATIONS HINTS

+V IN

AUX SHUTDOW

INPUT

OFF

ON

3 SD

8

+V IN _______ 5

ERROR

SPX2954

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)

Figure 6. System Over Temperature Protection

OR

RELAY

4

20mA

1N4001

0.1µF

+5V

4.7mA

8

+V IN

1

V OUT

SPX2954

7

FB

OUTPUT

2

GND

4

1N457

MIN VOLTAGE = 4V

360K Ω

Figure 7. Open Circuit Detector for 4mA to 20mA

Current Loop

UNREGULATED INPUT

8

IN

1

V OUT

SPX2954

6

V TAP

FB

7

2

SENSE

GND

4

330kΩ

27kΩ

+ 4.7µF

2N5432

(2)

5V

OUTPUT

LOAD

50mA

TO

300 mA

Figure 8. 300mA Regulator with 0.75V

Rev. 3/6/03

SP2954 250mA Low Dropout Voltage Regulator

11

© Copyright 2003 Sipex Corporation

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