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is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.KA78XXE / KA78XXAE 3-Terminal 1 A Positive Voltage Regulator
April 2015
KA78XXE / KA78XXAE
3-Terminal 1 A Positive Voltage Regulator
Features Description
Output Current up to 1 A The KA78XXE / KA78XXAE series of three-terminal posi-
tive regulators is available in the TO-220 / D-PAK pack-
Output Voltages of 5, 6, 8, 9, 10, 12, 15, 18, 24 V
age with several fixed-output voltages, making them
Thermal Overload Protection
useful in a wide range of applications. Each type employs
Short-Circuit Protection
internal current limiting, thermal shut-down, and safe
Output Transistor Safe Operating Area Protection
operating area. If adequate heat sinking is provided, they
can deliver over 1 A output current. Although designed
primarily as fixed-voltage regulators, these devices can
be used with external components for adjustable voltages
and currents.
(Dual Gauge)
TO-220 D-PAK
GND
GND
1
1. Input
2. GND
1
3. Output
Block Diagram
INPUT SERIES OUTPUT
PASS
1 ELEMENT
3
CURRENT
SOA
GENERATOR
PROTECTION
REFERENCE ERROR
STARTING
VOLTAGE AMPLIFIER
CIRCUIT
THERMAL
PROTECTION
GND
2
Figure 1. Block Diagram
2006 Fairchild Semiconductor Corporation www.fairchildsemi.com
KA78XXE / KA78XXAE Rev. 1.9