378R12 Datasheet (data sheet) PDF





378R12 Datasheet, KA378R12

378R12   378R12  

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www.DataSheet4U.com www.fairchildsemi.c om KA378R12 Low Dropout Voltage Regul ator Features • • • • • 3A/12 V Output Low Dropout Voltage Regulator TO-220 Full-Mold Package (4Pin) Overcur rent Protection, Thermal Shutdown Overv oltage Protection, Short Circuit Protec tion With Output Disable Function Desc ription The KA378R12 is a low-dropout v oltage regulator suitable for various e lectronic equipments. It provide consta nt voltage power source with TO-220 4 l ead full mold package. Dropout voltage of KA378R12 is below 0.5V in full rated current(3A). This regulator has variou s function such as peak current protect ion, thermal shut down, overvoltage

378R12 Datasheet, KA378R12

378R12   378R12  
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 HI GH / LOW Vdis 4 + SOA PROTECTION OUTPU T ON / OFF R2 1.4V SHORT-CIRCUIT SHORT CIRCUIT PROTECTION 3 GND Rev. 1.0.3 2005 Fairchild Semiconductor Corporati on KA378R12 www.DataSheet4U.com Abso lute Maximum Ratings Parameter Input Vo ltage Disable Voltage Output Current Po wer Dissipation 1 Power Dissipation 2 J unction Temperature Operating Temperatu re Thermal Resistance, Junction-to Case (Note2) Thermal Shutdown Temperature St orage Temperature Symbol Vin Vdis Io Pd 1 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 = 15V, Io = 1.5A, Ta = 25°C, unless otherwis e specified) Parameter Output Voltage L oad Regulation Line Regulation Ripple R ejection Ratio Dropout Voltage Disable Voltage High Disable Voltage Low Disabl e Bias Current High Disable Bias Curren t Low Quiescent Current Symbol Vo Rload Rline RR Vdrop VdisH VdisL IdisH IdisL Iq 5mA < Io < 3A 13V < Vin < 29V Note1 Io = 3A Output Active Output Disabled Vdis = 2.7V Vdis = 0.4V Io = 0A Conditions Min. 11.7 45 2.0








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