The LTC3729L-6 from Analog Devices is a DC to DC Converter with Input Voltage 4 to 30 V, Output Voltage 1 0.6 to 5 V, Output Current 1 40000 mA, Operating Temperature -40 to 125 Degree C, Storage Temperature -65 to 150 Degree C. Tags: Surface Mount, Buck/Step down. More details for LTC3729L-6 can be seen below.