LM317T by ON Semiconductor Design and production,in Xiangli Technology (Hong Kong) Co., Ltd. Spot sales,And can pass Xiangli Technology (Hong Kong) Co., Ltd. Purchasing。LM317T Price reference $ 1.148000。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