LM317T by Texas Instruments(TI) Design and production,in Tailai Electronics Co., Limited Spot sales,And can pass Tailai Electronics Co., Limited Purchasing。LM317T Price reference $ 2.030000。LM317T - 。You can download Chinese information、Pin map、DatasheetData sheet function specification,In the information LM317T Detailed pin diagram and function application circuit diagram voltage and usage method and tutorial