The MBU135 from Total Power International is a DC to DC Converter with Input Voltage 2.97 to 3.63 V, Output Voltage 1 3.3 V, Output Current 1 6 to 260 mA, Output Power 1000 mW, Operating Temperature -40 to 85 Degree C. Tags: Through Hole, Buck-Boost. More details for MBU135 can be seen below.