This power ic is packaged in a way that looks like a Tape & Reel (TR). In this IC management you will find SOT-23-5 functions for you to refer to. It also contains ICs of other kinds, such as POWER SUPPLY SUPPORT CIRCUIT, which are included in the power management.
RP300N27AA-TR-FE Features
RP300N27AA-TR-FE Applications
There are a lot of RICOH Electronic Devices Co., LTD. RP300N27AA-TR-FE Voltage Supervisors applications.