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KA278R33 Datasheet

  • KA278R33

  • Low Dropout Voltage Regulator

  • 8頁

  • FAIRCHILD

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www.fairchildsemi.com
KA278R33
Low Dropout Voltage Regulator
Features
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2A / 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 KA278R33 is a low-dropout voltage regulator suitable
for various electronic equipments. It provides constant volt-
age power source with TO-220 4 lead full mold package.
Dropout voltage of KA278R33 is below 0.5V in full rated
current(2A). This regulator has various function such as
peak current protection, thermal shut down, overvoltage pro-
tection 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
SOA PROTECTION
HIGH / LOW
Vdis
4
-
+
OUTPUT
ON / OFF
1.4V
SHORT-CIRCUIT
SHORTCIRCUIT
PROTECTION
R2
3
GND
Rev.1.0.1
漏2001 Fairchild Semiconductor Corporation

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