The LTC3889 from Analog Devices is a DC to DC Converter with Input Voltage 5 to 60 V, Output Voltage 1 1 V, Output Current 1 20000 mA, Operating Temperature -40 to 125 Degree C, Storage Temperature -65 to 150 Degree C. Tags: Surface Mount, Buck/Step down. More details for LTC3889 can be seen below.