LM317BD2TR4G 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。LM317BD2TR4G Price reference $ 1.218000。LM317BD2TR4G - 。You can download Chinese information、Pin map、DatasheetData sheet function specification,In the information LM317BD2TR4G Detailed pin diagram and function application circuit diagram voltage and usage method and tutorial