LM117 LM217, LM317 1.2 V to 37 V adjustable voltage regulators Features Output voltage range: 1.2 to 37 V Output current in excess of 1.5 A 0.1 % line and load regulation Floating operation for high voltages Complete series of protections: current limiting, thermal shutdown and SOA control TO-220 TO-220FP Description The LM117, LM217, LM317 are monolithic integrated circuits in TO-220, TO-220FP, TO-3 and DPAK packages intended for use as positive adjustable voltage regulators. They are designed DPAK TO-3 to supply more than 1.5 A of load current with an output voltage adjustable over a 1.2 to 37 V range. The nominal output voltage is selected by means of only a resistive divider, making the device exceptionally easy to use and eliminating the stocking of many fixed regulators. Table 1. Device summary Order codes TO-220 DPAK (tape and reel) TO-220FP TO-3 LM117K (1) LM217T LM217T-DG LM217D2T-TR LM217K (1) LM317T LM317T-DG LM317D2T-TR LM317P LM317K 1. TO-220 Dual Gauge frame. February 2012 Doc ID 2154 Rev 18 1/25 www.st.com 25Contents LM117, LM217, LM317 Contents 1 Pin configuration . 3 2 Maximum ratings 4 3 Diagram . 5 4 Electrical characteristics . 6 5 Typical characteristics . 8 6 Application information 9 7 Package mechanical data 13 8 Revision history . 24 2/25 Doc ID 2154 Rev 18