KA7905A Просмотр технического описания (PDF) - Fairchild Semiconductor

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KA7905A

3-TERMINAL 1A NEGATIVE VOLTAGE REGULATORS

Fairchild Semiconductor 

MC79XX (LM79XX) (KA79XX/A)

FIXED VOLTAGE REGULATOR (NEGATIVE)

TYPICAL APPLICATIONS

Fig. 6 Negative Fixed output regulator

+ 2.2µF

CI

1

+ 1µF

CO

- VI

2 KA79XX 3

- VO

Fig. 7 Split power supply (±12V/1A)

Notes:

(1) To specify an output voltage, substitute voltage value

for “XX “

(2) Required for stability. For value given, capacitor

must be solid tantalum. If aluminum electronics are

used, at least ten times value shown should be

selected. CI is required if regulator is located an

appreciable

distance from power supply filter.

(3) To improve transient response. If large capacitors

are used, a high current diode from input to output

(1N400l or similar) should be introduced to protect

the device from momentary input short circuit.

+ 15V

- 15V

1 KA7812

+

0.33µF 2

3

+

1µF

+ 2.2µF

1

2 KA7912

1µF +

3

+12V

1N4001

*

GND

1N4001

*

-12V

*: Against potential latch-up problems.

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