The R1223 from Ricoh Electronic Devices is a DC to DC Converter with Input Voltage 2.3 to 13.2 V, Output Voltage 1 1.5 to 5 V, Operating Temperature -40 to 85 Degree C, Storage Temperature -55 to 125 Degree C. Tags: Surface Mount, Buck/Step down. More details for R1223 can be seen below.