The MBU131 from Total Power International is a DC to DC Converter with Input Voltage 2.97 to 3.63 V, Output Voltage 1 5 V, Output Current 1 4 to 200 mA, Output Power 1000 mW, Operating Temperature -40 to 85 Degree C. Tags: Through Hole, Boost/Step Up. More details for MBU131 can be seen below.