The LTC3888-1 from Analog Devices is a DC to DC Converter with Input Voltage 4.5 to 26.5 V, Output Voltage 1 0.3 V, Output Current 1 400000 mA, Operating Temperature -40 to 125 Degree C, Storage Temperature -65 to 150 Degree C. Tags: Surface Mount, Buck/Step down. More details for LTC3888-1 can be seen below.