LM317D2T-TR by STMicroelectronics Design and production,in Shenzhen Jungu Technology Electronics Co., Ltd. Spot sales,And can pass Shenzhen Jungu Technology Electronics Co., Ltd. Purchasing。LM317D2T-TR Price reference $ 1.148000。LM317D2T-TR - 。You can download Chinese information、Pin map、DatasheetData sheet function specification,In the information LM317D2T-TR Detailed pin diagram and function application circuit diagram voltage and usage method and tutorial