LM317 integrated voltage stabilizing circuit

Relevant key device information applied in this article: LM317 　LM317 is a common adjustable integrated voltage regulator with a maximum output current of 2.2A and an output voltage range of 1.25~37V. The connection method is as follows: The voltage reference between pins 1 and 2 is 1.25V. To ensure the output performance of the voltage regulator, R1 should be less than 240 ohms. Changing the resistance of R2 can adjust the regulated voltage value. D1, D2 are used to protect LM317.