The package is delivered in a Tape & Reel (TR) case. On the Voltage regulator IC, there are 5 terminations that can be connected. As you can see, the regulator IC has a total of 5 pins. As far as the regulator type, it is a FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR type.
RP109N331B-TR-FE Features
RP109N331B-TR-FE Applications
There are a lot of RICOH Electronic Devices Co., LTD. RP109N331B-TR-FE Linear Voltage Regulators applications.