The RSO-0509S from Recom Power is a DC to DC Converter with Input Voltage 4.5 to 9 V, Output Voltage 1 9 V, Output Current 1 111 mA, Output Power 1000 mW, Operating Temperature -40 to 100 Degree C. Tags: Through Hole, Boost/Step Up. More details for RSO-0509S can be seen below.