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KA378R33

Low Dropout Voltage Regulator

Features
3A / 3.3V Output low dropout voltage regulator TO220 Full-Mold package (4PIN) Overcurrent protection, Thermal shutdown Overvoltage protection, Short-Circuit protection With output disable function

Description
The KA378R33 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 KA378R33 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
Vin 1 2 Vo

THERMAL SHUTDOWN

OVERVOLTAGE PROTECTION

BANDGAP REFERENCE

R1

SOA PROTECTION HIGH / LOW Vdis 4 OUTPUT ON / OFF

1.4V

SHORT-CIRCUIT SHORTCIRCUIT
PROTECTION

R2

3

Rev. 1.0.1
2001 Fairchild Semiconductor Corporation

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KA378R33 DATASHEET