The MEE1S0509DC from Murata is a DC to DC Converter with Input Voltage 4.5 to 5.5 V, Output Voltage 1 9 V, Output Current 1 111 mA, Output Power 1 W, Isolation Voltage 1000 V. Tags: Through Hole, Boost/Step Up. More details for MEE1S0509DC can be seen below.