The SP6648 from MaxLinear is a DC to DC Converter with Input Voltage 0.7 to 4.5 V, Output Voltage 1 2.5 to 5.5 V, Output Current 1 0.4 A, Operating Temperature -40 to 85 Degree C, Storage Temperature -65 to 150 Degree C. Tags: Surface Mount, Boost/Step Up. More details for SP6648 can be seen below.