The SBTN01N-09 from Mean Well is a DC to DC Converter with Input Voltage 21.6 to 26.4 V, Output Voltage 1 9 V, Output Current 1 11.1 to 111 mA, Output Power 1000 mW, Operating Temperature -40 to 90 Degree C. Tags: Surface Mount, Buck/Step down. More details for SBTN01N-09 can be seen below.