The MAX1834 from Analog Devices is a DC to DC Converter with Input Voltage 1.5 to 5.5 V, Output Voltage 1 2 to 5.5 V, Output Current 1 150 mA, Operating Temperature -40 to 85 Degree C, Storage Temperature -65 to 150 Degree C. Tags: Surface Mount, Buck/Step down. More details for MAX1834 can be seen below.