Tape & Reel (TR) cases are used for delivery. On the Linear IC itself, there are 4 terminations. There are a total of 4 pins on this board. There is one type of regulator for this device, which is FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR.
RP103K331B-TR Features
RP103K331B-TR Applications
There are a lot of RICOH Electronic Devices Co., LTD. RP103K331B-TR Linear Voltage Regulators applications.