The E0509D-1WR3 from MORNSUN is a DC to DC Converter with Input Voltage 4.5 to 5.5 V, Output Voltage 1 9 V, Output Current 1 6 to 56 mA, Output Power 1000 mW, Operating Temperature -40 to 105 Degree C. Tags: Through Hole, Boost/Step Up. More details for E0509D-1WR3 can be seen below.