The package is delivered in a Tape & Reel (TR) case. On the Voltage regulator IC, there are 4 terminations that can be connected. As you can see, the regulator IC has a total of 4 pins. As far as the regulator type, it is a FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR type.
RP109L201D-TR Features
RP109L201D-TR Applications
There are a lot of RICOH Electronic Devices Co., LTD. RP109L201D-TR Linear Voltage Regulators applications.