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MC79XX/MC79XXA/LM79XX

3-Terminal 1A Negative Voltage Regulator
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 MC79XX / MC79XXA/ 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
Vin

1

1. GND 2. Input 3. Output

Internal Block Digram

GND
R1 VOLTAGE REFERENCE

R2

Output Out

Q1

Q2 PROTECTION CIRCUITRY Rsc

I1

I2

Input

In

Rev. 1.0.1
2002 Fairchild Semiconductor Corporation

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LM7905 DATASHEET