The LTC3871 from Analog Devices is a DC to DC Converter with Input Voltage 1.2 to 100 V, Output Voltage 1 1.2 V, Output Current 1 30000 mA, Operating Temperature -40 to 150 Degree C, Storage Temperature -65 to 150 Degree C. Tags: Surface Mount, Buck-Boost. More details for LTC3871 can be seen below.