View lm317 utc datasheet:

UTC LM317 LINEAR INTEGRATED CIRCUIT 3-TERMINAL 1A POSITIVE ADJUSTABLE VOLTAGE REGULATOR DESCRIPTION 1 The UTC LM317 is an adjustable 3-terminal positive TO-220 voltage regulator, designed to supply more than 1.5A of output current with voltage adjustable from 1.3 to 37V. FEATURES 1 *Output current up to 1.5A. TO-263 *Output voltage adjustable from 1.3V to 37V. *Internal short circuit protection. *Internal over temperature protection. *Safe-Area compensation for output transistor. 1 TO-252 1:ADJ 2:Output 3:Input BLOCK DIAGRAM INPUT PROTECTION VREF CIRCUIT OUTPUT VAdj UTC UNISONIC TECHNOLOGIES CO., LTD. 1 QW-R101-009,B UTC LM317 LINEAR INTEGRATED CIRCUIT ABSOLUTE MAXIMUM RATINGS(Ta=25°C, UNLESS OTHERWISE SPECIFIED) PARAMETER SYMBOL VALUE UNIT Input - Output