The 36F0509S-1WR2 from Ideal Power Ltd is a DC to DC Converter with Input Voltage 4.5 to 5.5 V, Output Voltage 1 9 V, Output Current 1 12 to 111 mA, Output Power 1000 mW, Isolation Voltage 3000 V. Tags: Through Hole, Boost/Step Up. More details for 36F0509S-1WR2 can be seen below.