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KA278RA05 Datasheet

  • KA278RA05

  • Low Dropout Voltage Regulator (Fixed & Adjustable)

  • 8頁(yè)

  • FAIRCHILD

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www.fairchildsemi.com
KA278RA05
Low Dropout Voltage Regulator
(Fixed & Adjustable)
Features
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Nominal 5V output without adjusting
Output Adjustable Between 1.25V and 32V
2A Output low dropout voltage regulator
TO220 Full-Mold package (4PIN)
Overcurrent protection, Thermal shutdown
Overvoltage protection, Short-Circuit protection
Description
The KA278RA05 is a low-dropout voltage regulator suitable
for various electronic equipments. It provides constant
voltage power source with TO-220F-4 lead full mold
package. Dropout voltage of KA278RA05 is below 0.5V in
full rated current(2A). This regulator has various function
such as peak current protection, thermal shut down and over
voltage protection.
TO-220F-4L
1
1. Vin 2. V
O
3. GND 4. Vadj
Internal Block Diagram
Q1
Vin
1
2 Vo
THERMAL SHUTDOWN
OVERVOLTAGE
PROTECTION
BANDGAP REFERENCE
-
+
Rin
1.8k鈩?/div>
R1
SOA PROTECTION
4
Vadj
SHORT-CIRCUIT
SHORTCIRCUIT
PROTECTION
R2
0.6k鈩?/div>
Rref
3
GND
Rev. 1.0.2
漏2001 Fairchild Semiconductor Corporation

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