# LM317 oscillating problem

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#### muchlux

##### Newbie level 3
Hi,
I use a LM317T to build a current regulator 60mA.
15VDC Input (Pin 2) 680nF to ground.
Output (Pin 3) 20 Ohms to Ref (Pin 1).
Usually the circuit works fine.
But with a new LM317T from ST (China) it's oscillating 1..10MHz and I found no solution to solve the Problem.

#### IanP

Go through both engineers notes ..
They should help you to find a solution to this problem ..
Code:
Engineers note: Capacitors are key to voltage regulator design
See section on linear regulators ..
and
https://www.tnt-audio.com/clinica/regulators2_impedance1_e.html

Regards,
IanP

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