View lm317 datasheet:

www.fairchildsemi.com LM317 3-terminal posifive adjustable regulator Features Description • Output Current In Excess of 1. 5A This monolithic integrated circuit is an adjustable 3-terminal • Output Adjustable Between 1. 2V and 37V positive voltage regulator designed to supply more than 1.5A • Internal Thermal-Overload Protection of load current with an output voltage adjustable over a 1.2 • Internal Short-Circuit Current-Limiting to 37V. It employs internal current limiting, thermal shut- • Output Transistor Sate-Area Compensation down and safe area compensation. • TO-220 Package TO-220 1 1. Adj 2. Output 3. Input Internal Block Diagram Vin Input 3 Protection Voltage Circuitry Reference Rlimit 2 Vo Output 1 Vadj Rev. 5.0 ©2000 Fairchild Semiconductor Internati