The LT3840 from Analog Devices is a DC to DC Converter with Input Voltage 2.5 to 60 V, Output Voltage 1 1.25 to 60 V, Output Current 1 20000 mA, Operating Temperature -55 to 150 Degree C, Storage Temperature -65 to 150 Degree C. Tags: Surface Mount, Buck/Step down. More details for LT3840 can be seen below.