MC79XX (LM79XX) (KA79XX/A)

FIXED VOLTAGE REGULATOR (NEGATIVE)

3-TERMINAL 1A NEGATIVE VOLTAGE REGULATORS

The MC79XX 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 area protection, making it essentially indestructible.

FEATURES

• Output Current in Excess of 1A

• Output Voltages of -5, -6, -8, -12, -15, -18, -24V

• Internal Thermal Overload Protection

• Short Circuit Protection

• Output Transistor Safe-Area Compensation

Device

Output Voltage

Tolerance

Package

Operating Temperature

MC79XXCT (LM79XXCT) (KA79XX)

± 4%

KA79XXA

± 2%

TO-220

0 ~+125

°C

VOLTAGE

REFERENCE

+

-

PROTECTION

CIRCUITRY

R1

R2

Rsc

GND

I1

I2

Out

In

Q1

Q2

TO-220

1: GND 2: Input 3: Output

ORDERING INFORMATION

BLOCK DIAGRAM

©1999 Fairchild Semiconductor Corporation

Rev. C