TPS54140DGQ by Texas Instruments(TI) Design and production,in Hong Kong QX Electronics Limited Spot sales,And can pass Hong Kong QX Electronics Limited Purchasing。TPS54140DGQ Price reference $ 2.720000。TPS54140DGQ - 。You can download Chinese information、Pin map、DatasheetData sheet function specification,In the information TPS54140DGQ Detailed pin diagram and function application circuit diagram voltage and usage method and tutorial