©2009 Fairchild Semiconductor Corporation

www.fairchildsemi.com

Rev. 1.0.2

Features

• Output Current in Excess of 1.5A

• Output Adjustable Between 1. 2V and 57V

• Internal Thermal Overload Protection

• Internal Short Circuit Current Limiting

• Output Transistor Safe Area Compensation

• TO-220 Package

Description

This monolithic integrated circuit is an adjustable 3-terminal

positive voltage regulator designed to supply more than 1.5A

of load current with an output voltage adjustable over a 1.2

to 57V. It employs internal current limiting, thermal shut

down and safe area compensation.

TO-220

1. Adj 2. Output 3. Input

1

Output

2 3

Internal Block Diagram

Rlimit

3

Vin

Vo

1

Voltage

Reference

Vadj

2

Protection

Circuitry

+

-

Input

Output

LM317AHV

3-Terminal Positive Adjustable Regulator