This power ic is packaged in a way that looks like a Tape & Reel (TR). It is important to note that the power management also includes other IC types, such as POWER SUPPLY SUPPORT CIRCUIT.
RP300K28AA-TR Features
RP300K28AA-TR Applications
There are a lot of RICOH Electronic Devices Co., LTD. RP300K28AA-TR Voltage Supervisors applications.