M3 refers to the SOT-223 package. There should be a -- and then there's the voltage. For example, 1117M3-2.5, this is 2.5V. If not followed by - and other numbers, this power supply is adjustable. 250452 is the production number. Wide VIN input range: 7V to 30V 15A continuous output current efficiency up to 96% Built-in adjustable line compensation adjustable output voltage \/ -2% output voltage accuracy.
Hello, the 1117 is a low-voltage differential three-terminal adjustable voltage regulator integrated circuit, its minimum output voltage is 1.25V, and the use of the same as the LM317. You just ground the control end (Adj) and the output is 1.25V. You can test it.