KA278R12TU 查看數據表（PDF） - Fairchild Semiconductor

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KA278R12TU

Low Dropout Voltage Regulator

Fairchild Semiconductor 

KA278R12

Low Dropout Voltage Regulator

www.fairchildsemi.com

Features

• 2A / 12V 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 KA278R12 is a low-dropout voltage regulator suitable

for various electronic equipments. It provide constant

voltage power source with TO-220F-4 lead full mold

package. Dropout voltage of KA278R12 is below 0.5V in

full rated current(2A). 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

SHSOHORRTT-CCIIRRCCUUITIT

PROTECTION

Q1

R1

R2

2 Vo

3

GND

©2001 Fairchild Semiconductor Corporation

Rev. 1.0.2

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