The BD9781HFP from ROHM Semiconductor is a DC to DC Converter with Input Voltage 7 to 35 V, Output Voltage 1 1 to 35 V, Output Current 1 4000 mA, Operating Temperature -40 to 125 Degree C, Storage Temperature -55 to 150 Degree C. Tags: Surface Mount, Buck/Step down. More details for BD9781HFP can be seen below.