1. Application Circuit

Positive/Negative Voltage Supply

Note :

2. Note in Application Circuit

( 1 )

( 2 )

* In case of negative voltage regulator, reverse the SBD and capacitor direction.

In the following explain only the positive regulator unless otherwise specified. However they can apply to the

negative voltage regulator by easy change.

In the above positive and negative

power supply application, D1 and D2

should be connected. If D1 and D2

are not connected, either of positive

or negative power supply circuit may

not turns on.

If the higher voltage (above the rated value) or lower voltage (GND-0.5V) is supplied to the input

terminals, the IC may be destroyed. To avoid such a case, a zener diode or other parts of the surge

supressor should be connected as shown below.

If the higher voltage than the input terminal is supplied to the output terminal, the IC may be

destroyed. To avoid input terminal short to the GND or the stored voltage in the capacitor back to the

output terminal, by the large value capacitor connecting to the output terminal application, the SBD

should be required as shown below;

COM

-Vin

+Vin

0.33uF

0.33uF

OUT

COM

IN

79 series

OUT

GND

IN

78 series

-Vo

+Vo

D2

D1

0.1uF

0.1uF

Vin

Vo

IN

1

OUT

3

Capacitor

+

Ze ner Diode

R

Vo

Vin

Capacitor

+

IN

1

OUT

3

L

Diode

Vin

Vo

Capacitor

+

IN

1

OUT

3

DIODE

Page 7 of 10