KA278R05TU 查看數據表（PDF） - Fairchild Semiconductor

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KA278R05TU

Low Dropout Voltage Regulator

Fairchild Semiconductor 

KA278R05

Low Dropout Voltage Regulator

www.fairchildsemi.com

Features

• 2A/5V 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 KA278R05 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.

The dropout voltage of KA278R05 is below 0.5V in full

rated current(2A). This regulator has various functions such

as a peak current protection, a thermal shut down, an

overvoltage protection and an 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-CTCIRIRCCUUITIT

PROTECTION

Q1

R1

R2

2 Vo

3

GND

©2002 Fairchild Semiconductor Corporation

Rev. 1.0.2

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