LM2931AD50R by STMicroelectronics Design and production,in TanJiayuan Electronics Spot sales,And can pass TanJiayuan Electronics Purchasing。LM2931AD50R Price reference ¥ 8.380487。LM2931AD50R - 。You can download Chinese information、Pin map、DatasheetData sheet function specification,In the information LM2931AD50R Detailed pin diagram and function application circuit diagram voltage and usage method and tutorial