KA78R05C

www.fairchildsemi.com KA78RXXC-Series 1A Output Low Dropout Voltage Regulators Features 1A/3.3V, 5V, 8V, 9V, 12V, 15V 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 KA78RXXC 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. Dropout voltage of KA78RXXC is below 0.5V in full rated current(1A). This regulator has various functions such as peak current protection, thermal shut down, overvoltage protection and output disable function. TO-220F-4L Internal Block Diagram Vin 1 THERMAL SHUTDOWN BANDGAP REFERENCE Vdis HIGH / LOW 4 + OUTPUT ON / OFF 1.4V 1 1. Vin 2. VO 3. GND 4. Vdis OVERVOLTAGE PROTECTION + SOA PROTECTION Q1 R1 SHSOHORRT-TCCIIRCCUUIITT PROTECTION R2 2 Vo ©2011 Fairchild Semiconductor Corporation 3 GND Rev. 1.0.1 KA78RXXC-SERIES Absolute Maximum Ratings KA78RXXC Parameter Input voltage Disable voltage Output current Power dissipation 1 Power dissipation 2 Junction temperature Operating temperature Thermal resistance, junction-to case (Note2) Thermal resistance, junction-to-air (Note2) Symbol Vin Vdis Io Pd1 Pd2 Tj Topr Rθjc Rθja Value 35 35 1.0 1.5 15 +150 -20 ~ +80 4.31 48.83 Unit V V A W W °C °C °C/W °C/W Remark - No heatsink With heatsink - 2 Electrical Characteristics (...