AP78L05/08/12

AP78LXX SERIES 3-TERMINAL POSITIVE

REGULATORS

AP78L05/08/12 Rev. 9

11 of 15

FEBRUARY 2009

www.diodes.com

Typical Application Circuit

AP78LXX

C1

★

0.33µF

Fixed Output regulator

Input

Output

C2

★★

0.1µF

OUT

IN

GND

★：Required if the regulator is located more than 3" from the power supply filter.

★★：See (Note 5) in the electrical characteristics table.

Functional Description

Introduction

The AP78LXX series is a three terminal device with fixed output voltages from 5V,8V and 12V. The AP78LXX fixed voltage regulator

series has built-in thermal overload protection which prevents the device from being damaged due to excessive junction temperature.

The regulator also contains internal short-circuit protection which limits the maximum output current, and safe-area protection for the

pass transistor which reduces the short-circuit current as the voltage across the pass transistor is increased.