A Tape & Reel (TR) package is used to package the power management. In this PMIC, you can find SOT-23-5 functions for your reference. There are a lot of similarities between this IC power and other Active products.
R3134N28EC-TR-FE Features
Active type
R3134N28EC-TR-FE Applications
There are a lot of RICOH Electronic Devices Co., LTD. R3134N28EC-TR-FE Voltage Supervisors applications.