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KA278RXXC-Series

2A Output Low Dropout Voltage Regulators
Features
KA278RXXC-series (33/05/51/09/12)
2A/3.3V, 5V, 5.1V, 9V, 12V 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 KA278RXXC 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 KA278RXXC 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 .
TO-220F-4L

KA278RA05C
Nominal 5V output without adjusting Output adjustable between 1.25V and 32V 2A output low dropout voltage regulator TO-220 full-mold package (4pin) Overcurrent protection, thermal shutdown Overvoltage protection, short circuit protection

1

1.Vin 2. Vo 3. GND 4. Vdis - KA278RXXC(33/05/51/09/12) 1.Vin 2. Vo 3. GND 4. Vadj - KA278RA05C

Internal Block Diagram

Vin

1

Q1

2

Vo

Vin

1

Q1

2 Vo

THERMAL SHUTDOWN

OVERVOLTAGE PROTECTION

THERMAL SHUTDOWN

OVERVOLTAGE PROTECTION

BANDGAP REFERENCE

R1

BANDGAP REFERENCE

Rin

SOA PROTECTION HIGH / LOW Vdis 4 OUTPUT ON / OFF

SOA PROTECTION

4
R2 SHORTCIRCUIT PROTECTION

Vadj

1.4V

SHORTCIRCUIT PROTECTION

Rref

3 GND

3 GND

(KA278R33/05/51/09/12C)

(KA278RA05C)

Rev. 1.0.2
2005 Fairchild Semiconductor Corporation

KA278R09C Datasheet Fairchild Download PDF

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KA278R09C DATASHEET