378R12

www.DataSheet4U.com www.fairchildsemi.com KA378R12 Low Dropout Voltage Regulator Features 3A/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 KA378R12 is a low-dropout voltage regulator suitable for various electronic equipments. It provide constant voltage power source with TO-220 4 lead full mold package. Dropout voltage of KA378R12 is below 0.5V in full rated current(3A). This regulator has various function such as peak current protection, thermal shut down, overvoltage protection and output disable function. TO-220F-4L 1 1. Vin 2. Vo 3. GND 4. Vdis Internal Block Diagram Q1 Vin 1 2 Vo THERMAL SHUTDOWN OVERVOLTAGE PROTECTION BANDGAP REFERENCE + R1 HIGH / LOW Vdis 4 + SOA PROTECTION OUTPUT ON / OFF R2 1.4V SHORT-CIRCUIT SHORTCIRCUIT PROTECTION 3 GND Rev. 1.0.3 ©2005 Fairchild Semiconductor Corporation KA378R12 www.DataSheet4U.com Absolute Maximum Ratings Parameter Input Voltage Disable Voltage Output Current Power Dissipation 1 Power Dissipation 2 Junction Temperature Operating Temperature Thermal Resistance, Junction-to Case(Note2) Thermal Shutdown Temperature Storage Temperature Symbol Vin Vdis Io Pd1 Pd2 Tj Topr Rθjc Ttsd Tstg Value 35 35 3.0 1.5 15 150 -20 ~ 80 2.9 150 -65 ~ 150 Unit V V A W W °C °C °C/W °C °C Remark No Heatsink With Heatsink - Electrical Characteristics (Vin = 15...