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KA278R51C Datasheet(PDF) 1 Page - Fairchild Semiconductor |
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KA278R51C Datasheet(HTML) 1 Page - Fairchild Semiconductor |
1 / 20 page ©2005 Fairchild Semiconductor Corporation www.fairchildsemi.com Rev. 1.0.2 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 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 Description The KA278RXXC is a low-dropout voltage regulator suit- able 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 1.Vin 2. Vo 3. GND 4. Vdis - KA278RXXC(33/05/51/09/12) 1 1.Vin 2. Vo 3. GND 4. Vadj - KA278RA05C Internal Block Diagram THERMAL SHUTDOWN BANDGAP REFERENCE OVERVOLTAGE PROTECTION SOA PROTECTION SHORTCIRCUIT PROTECTION 1 4 3 2 Vin Vadj Vo GND Q1 Rin Rref + - THERMAL SHUTDOWN BANDGAP REFERENCE OVERVOLTAGE PROTECTION SOA PROTECTION SHORTCIRCUIT PROTECTION 1 4 3 2 Vin Vdis Vo GND HIGH / LOW OUTPUT ON / OFF Q1 R1 R2 - + - + 1.4V (KA278RA05C) (KA278R33/05/51/09/12C) KA278RXXC-Series 2A Output Low Dropout Voltage Regulators |
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