TPS54540DDA by TI Design and production,in HongKong RichShine Technology Co., Limited Spot sales,And can pass HongKong RichShine Technology Co., Limited Purchasing。TPS54540DDA Price reference $ 5.010000。TPS54540DDA - 。You can download TPS54540DDA Chinese information、Pin map、DatasheetData sheet function specification,In the information TPS54540DDA Detailed pin diagram and function application circuit diagram voltage and usage method and tutorial