The RP517 from Ricoh Electronic Devices is a DC to DC Converter with Input Voltage 1.8 to 5.5 V, Output Voltage 1 0.3 to 1.2 V, Output Current 1 300 mA, Operating Temperature -40 to 85 Degree C, Storage Temperature -55 to 125 Degree C. Tags: Surface Mount, Buck/Step down. More details for RP517 can be seen below.