ka278r33 Fairchild Semiconductor, ka278r33 Datasheet
ka278r33
Manufacturer Part Number
ka278r33
Description
Low Dropout Voltage Regulator
Manufacturer
Fairchild Semiconductor
Datasheet
1.KA278R33.pdf
(8 pages)
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Features
• 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
Internal Block Diagram
©2001 Fairchild Semiconductor Corporation
KA278R33
Low Dropout Voltage Regulator
Vin
1
Vdis
4
1.4V
HIGH / LOW
BANDGAP REFERENCE
THERMAL SHUTDOWN
-
+
OUTPUT
ON / OFF
SHORT-CIRCUIT
SOA PROTECTION
SHORTCIRCUIT
PROTECTION
-
+
OVERVOLTAGE
PROTECTION
GND
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.
3
TO-220F-4L
1. Vin 2. Vo 3. GND 4. Vdis
1
Q1
www.fairchildsemi.com
R1
R2
2
Vo
Rev.1.0.1
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