The TDA386400000AUMA1 from Infineon Technologies is a DC to DC Converter with Input Voltage 5 to 17 V, Output Voltage 1 0.25 to 3.04 V, Output Current 1 40000 mA, Supply Voltage 5 V, Operating Temperature -40 to 125 degree C. Tags: Surface Mount, Buck/Step down. More details for TDA386400000AUMA1 can be seen below.