The R1286 from Ricoh Electronic Devices is a DC to DC Converter with Input Voltage 2.3 to 5.5 V, Output Voltage 1 4.6 to 5.8 V, Output Current 1 250 mA, Operating Temperature -40 to 85 Degree C, Storage Temperature -55 to 125 Degree C. Tags: Surface Mount, Boost/Step Up, Buck/Step down. More details for R1286 can be seen below.