LM79XX

12

Typical Applications

Figure 6. Negative Fixed output regulator

Figure 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 aluminium 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.

2.2

μF

2

- VI

- VO

KA79XX

1

3

++ 1μF

CI

CO

Input

Output

LM79XX

1N4001

2.2

μF

2

- 15V

-12V

KA7912

1

3

++

1

μF

0.33

μF

+

KA7812

+ 15V

+12V

+

1

μF

1

2

3

1N4001

GND

*

*

MC7812

LM7912

Co

Co

C1

C1