The PUB0305S2B from Flex Power Modules is a DC to DC Converter with Input Voltage 2.97 to 3.63 V, Output Voltage 1 5 V, Output Current 1 0.4 A, Output Power 2000 mW, Isolation Voltage 4000 Vdc. Tags: Through Hole, Boost/Step Up. More details for PUB0305S2B can be seen below.