AP78L05/08/12

AP78LXX SERIES 3-TERMINAL POSITIVE REGULATORS

AP78L05/08/12

Document number: DS31054 Rev. 10 - 2

2 of 16

www.diodes.com

March 2012

© Diodes Incorporated

Typical Application Circuit

Fixed Output Regulator

AP78Lxx

OUT

IN

Input

Output

GND

C1

0.33µF

†

C2

0.1µF

‡

(†) Required if the regulator is located more than 3” from the power supply filter

(‡) See Note 5 in the electrical characteristics table

Pin Descriptions

Pin Name

Description

Operating Voltage Input

Voltage Output Pin

GND

Ground

NC

No Connection

Functional Block Diagram

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.