The MAX1678 from Analog Devices is a DC to DC Converter with Input Voltage 0.7 to 5.5 V, Output Voltage 1 2 to 5.5 V, Output Current 1 90 mA, Operating Temperature -40 to 85 Degree C, Storage Temperature -65 to 165 Degree C. Tags: Surface Mount, Buck/Step down. More details for MAX1678 can be seen below.