www.fairchildsemi.com
KA79XX/KA79XXA
3-Terminal 1A Negative Voltage Regulator
r
Features
•
•
•
•
•
Output Current in Excess of 1A
Output Voltages of -5, -6, -8, -9, -10, -12, -15, -18 , -24V
Internal Thermal Overload Protection
Short Circuit Protection
Output Transistor Safe Operating Area Compensation
Description
The KA79XX/KA79XXA 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 shutdown and safe operating area
protection, making it essentially indestructible.
TO-220
Vin
1
1. GND 2. Input 3. Output
Internal Block Digram
GND
R1
VOLTAGE
REFERENCE
R2
Out
Output
+
Q1
-
Q2
PROTECTION
CIRCUITRY
Rsc
I1
I2
Input
In
Rev. 1.0.1
©2002 Fairchild Semiconductor Corporation
FAIRCHILD [ FAIRCHILD SEMICONDUCTOR ]
