The ADP1053 from Analog Devices is a DC to DC Converter with Input Voltage 3 to 3.6 V, Output Voltage 1 0.8 to 2.7 V, Operating Temperature -40 to 125 Degree C, Storage Temperature -65 to 150 Degree C. Tags: Surface Mount, Buck/Step down. More details for ADP1053 can be seen below.