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KA378R12

Low Dropout Voltage Regulator
Features
3A/12V Output Low Dropout Voltage Regulator TO-220 Full-Mold Package (4Pin) Overcurrent Protection, Thermal Shutdown Overvoltage Protection, Short Circuit Protection With Output Disable Function

Description
The KA378R12 is a low-dropout voltage regulator suitable for various electronic equipments. It provide constant voltage power source with TO-220 4 lead full mold package. Dropout voltage of KA378R12 is below 0.5V in full rated current(3A). This regulator has various function such as peak current protection, thermal shut down, overvoltage protection and output disable function.
TO-220F-4L

1

1. Vin 2. Vo 3. GND 4. Vdis

Internal Block Diagram
Q1

Vin

1

2

Vo

THERMAL SHUTDOWN

OVERVOLTAGE PROTECTION

BANDGAP REFERENCE

R1

HIGH / LOW Vdis 4

SOA PROTECTION OUTPUT ON / OFF

R2 1.4V
SHORT-CIRCUIT SHORTCIRCUIT PROTECTION

3 GND

Rev. 1.0.3
2005 Fairchild Semiconductor Corporation

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KA378R12 DATASHEET