This power ic is packaged in a way that looks like a Tape & Reel (TR). Other IC kinds, such as POWER SUPPLY SUPPORT CIRCUIT are included in the power management system.
RP300K43AA8-TR Features
RP300K43AA8-TR Applications
There are a lot of RICOH Electronic Devices Co., LTD. RP300K43AA8-TR Voltage Supervisors applications.