The LT3740 from Analog Devices is a DC to DC Converter with Input Voltage 2.2 to 22 V, Output Voltage 1 0.8 to 5 V, Output Current 1 20000 mA, Operating Temperature -40 to 125 Degree C, Storage Temperature -65 to 125 Degree C. Tags: Surface Mount, Buck/Step down. More details for LT3740 can be seen below.