The MAX20029B from Analog Devices is a DC to DC Converter with Input Voltage 3 to 5.5 V, Output Voltage 1 0.7 to 4 V, Output Current 1 1500 mA, Operating Temperature -40 to 125 Degree C, Storage Temperature -65 to 150 Degree C. Tags: Surface Mount, Buck/Step down. More details for MAX20029B can be seen below.