LM317M PDF – 500mA, Adjustable Voltage Regulator – TI

What is LM317M?

This IC is an adjustable 3-terminal positive voltage regulator capable of supplying more than 500-mA over an output-voltage range of 1.25-V to 37-V.

Part Number : LM317M


Package: TO-252, SOT-223 Type

Manufacturer: Texas Instruments


LM317M Voltage Regulator




The LM317M is exceptionally easy to use and requires only two external resistors to set the output. Furthermore, both line and load regulation are better than standard fixed regulators. In addition to having higher performance than fixed regulators, the LM317M includes on-chip current limiting, thermal-overload protection, and safe-operating-area protection. All overload protection remains fully functional if the ADJUST terminal is disconnected.


LM317M datasheet

Advantages Vs Disadvantages


1. Flexibility in output voltage regulation, due to the adjustable output feature
2. Low dropout voltage, which allows for efficient voltage regulation even with low input-output voltage differentials
3. Thermal overload and short circuit protection features, which protect the device and the circuit from damage in the event of a fault condition
4. Output current limiting, which helps prevent damage to the device and the circuit due to overloading


1. Limited maximum output current, which restricts its use in high-power applications
2. Output voltage drift, which can be a concern in precision applications
3. Voltage regulation accuracy can be affected by changes in input voltage and temperature



1. Output Voltage Range Adjustable from 1.25-V to 37-V
2. Output Current Greater Than 500-mA
3. Internal Short-Circuit Current Limiting
4. Thermal-Overload Protection
5. Output Safe-Area Compensation
6. Q Devices Meet Automotive Performance Requirements


1. Electronic Point-of-Sales
2. Medical/Health/Fitness Applications
3. Printers
4. Appliances/White Goods
5. TV/Set-Top Box

Other data sheets are available within the file: LM317MDCY, LM317MDCYG3, LM317MDCYR, LM317MDCYRG3

LM317M PDF Datasheet Download

LM317M pdf