View ka278ra05 datasheet:

www.fairchildsemi.com KA278RA05 Low Dropout Voltage Regulator (Fixed & Adjustable) Features Description • Nominal 5V output without adjusting The KA278RA05 is a low-dropout voltage regulator suitable • Output Adjustable Between 1.25V and 32V for various electronic equipments. It provides constant • 2A Output low dropout voltage regulator voltage power source with TO-220F-4 lead full mold • TO220 Full-Mold package (4PIN) package. Dropout voltage of KA278RA05 is below 0.5V in • Overcurrent protection, Thermal shutdown full rated current(2A). This regulator has various function • Overvoltage protection, Short-Circuit protection such as peak current protection, thermal shut down and over voltage protection. TO-220F-4L 1 1. Vin 2. VO 3. GND 4. Vadj Internal Block Diagram Q1