78T12

www.fairchildsemi.com www.DataSheet4U.com MC78TXX 3-Terminal 3A Positive Voltage Regulator Features Output Current in Excess of 3.0A Output Transistor Safe Operating Area Compensation Power Dissipation :25W Internal Short Circuit Current Limiting Internal Thermal Overload Protection Output Voltage Offered in 4% Tolerance No External Components Required Output Voltage of 5,12 and 15V Description This family of fixed voltage regulators are monolithic integrated circuit capable of driving loads in excess of 3.0 A. TO-220 GND 1 1.Input 2. GND 3. Output Internal Block Diagram INPUT 1 CURRENT GENERATOR SERIES PASS ELEMENT OUTPUT 3 SOA PROTECTION STARTING CIRCUIT REFERENCE VOLTAGE ERROR AMPLIFIER THERMAL PROTECTION GND 2 Rev. 1.0.1 ©2002 Fairchild Semiconductor Corporation MC78TXX Absolute Maximum Ratings www.DataSheet4U.com Parameter Symbol VI PD RθJA RθJC TJ TSTG Value 35 40 Internally limited 65 2.5 0 ~ +125 -65 ~ +150 Unit V V Input Voltage (for VO = 5V to 12V) (for VO = 15V) Power Dissipation Thermal Resistance, Junction to Air (Note1, 2) Ta = +25°C Thermal Resistance, Junction to Case (Note1) Tc = +25°C Operating Junction Temperature Range Storage Temperature Range Note: 1. Thermal resistance test board Size: 76.2mm * 114.3mm * 1.6mm(1S0P) JEDEC standard: JESD51-3, JESD51-7 2. Assume no ambient airflow. °C/W °C/W °C °C Electrical Characteristics(MC78T05) (VI = 10V, IO = 3.0 A, 0°C ≤ TJ ≤ +125°C, Po ≤ PMAX (Note3), unless otherwise specif...