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KA378R05TU

Low Dropout Voltage Regulator

Fairchild Semiconductor 

KA378R05

Low Dropout Voltage Regulator

www.fairchildsemi.com

Features

• 3A / 5V 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 KA378R05 is a low-dropout voltage regulator suitable

for various electronic equipments. It provides constant

voltage power source with TO-220 4 lead full mold package.

Dropout voltage of KA378R05 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

THERMAL SHUTDOWN

BANDGAP REFERENCE

HIGH / LOW

Vdis 4

-

+

OUTPUT

ON / OFF

1.4V

OVERVOLTAGE

PROTECTION

-

+

SOA PROTECTION

SHSOHROTR-TCCIIRRCCUUIITT

PROTECTION

Q1

R1

R2

2 Vo

3

GND

©2001 Fairchild Semiconductor Corporation

Rev. 1.0.2

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