©2009 Fairchild Semiconductor Corporation

www.fairchildsemi.com

Rev. 1.0.2

Features

• Output Current in Excess of 1A

• Output Voltages of -5, -6, -8 , -9, -10, -12, -15, -18 and -

24V

• Internal Thermal Overload Protection

• Short Circuit Protection

• Output Transistor Safe Operating Area Compensation

Description

The LM79XX series of three terminal negative regulators

are available in TO-220 package and with several fixed

output voltages, making them useful in a wide range

of applications. Each type employs internal current limiting,

thermal shut down and safe operating area protection,

making it essentially indestructible.

TO-220

1. GND 2. Input 3. Output

1

Vin

Internal Block Digram

VOLTAGE

REFERENCE

+

-

PROTECTION

CIRCUITRY

R1

R2

Rsc

GND

I1

I2

Out

In

Q1

Q2

Output

Input

LM79XX

3-Terminal 1A Negative Voltage Regulator