ST LM217L LM317L Low Current 1.2 to 37V Adjustable Voltage Regulator
Summary
This manual details the robust LM217L and LM317L adjustable voltage regulators, designed to provide stable power from 1.2V up to 37V for electronic circuits. These monolithic integrated chips are ideal for engineers who require a reliable positive voltage regulator capable of supplying over 100 mA of current while featuring built-in protection against short circuits and thermal overload. The documentation provides comprehensive technical specifications, including maximum ratings, detailed electrical characteristics across various operating conditions, pin configurations (SO-8/TO-92), and application guidance necessary for seamless circuit design.
Page 1 Text Content
LM217L LM317L
Low current 1.2 to 37V adjustable voltage regulator
Features Output voltage range: 1.2 to 37V Output current in excess of 100 m A Line regulation typ. 0.01% Load regulation typ. 0.1% Thermal overload protection
Short circuit protection SO-8TO-92
Output transition safe area compensation Floating operation for high voltage applications
Description The nominal output voltage is selected by means
of only a resistive divider, making the device
The LM217L/LM317L are monolithic integrated
exceptionally easy to use and eliminating the
circuit in SO-8 and TO-92 packages intended for
stocking of many fixed regulators.
use as positive adjustable voltage regulators. They are designed to supply until 100 m A of load current with an output voltage adjustable over a 1.2 to 37V range.
Order codes
Packages
Part numbers
SO-8 (Tape & reel) TO-92 (BAG) (1)
LM217L LM217LD13TR LM217LZ LM317L LM317LD13TR LM317LZ
1. Available in tape & reel with the suffix "-TR" and in Ammopak with the suffix "-AP". Please note that in these cases pins are shaped according to tape & reel specifications
May 2007 Rev. 4 1/18
www.st.com
Page Summary Contents For ST LM217L LM317L Low Current 1.2 to 37V Adjustable Voltage Regulator
Manual Details
| Brand | Current |
|---|---|
| Pages | 18 |
| File Size | 288.62 KB |
| Published | May 18, 2026 |
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Frequently Asked Questions
What is the regulated output voltage range for this device?
The output voltage can be adjusted over a wide range, from 1.2V up to 37V.
How must I adjust the output voltage?
The nominal output voltage is selected using only a resistive divider connected to the ADJUST pin.
What types of protections are included with this regulator?
It features thermal overload protection, short circuit protection, and output transition safe area compensation.
Can these regulators be used in life-saving equipment?
They are not recommended for life sustaining applications unless specifically approved and authorized.