Tape & Reel (TR) cases are used for delivery. On the Linear IC itself, there are 5 terminations. There are a total of 5 pins on this board. There is one type of regulator for this device, which is FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR.
R1131N321A-TR-FE Features
R1131N321A-TR-FE Applications
There are a lot of RICOH Electronic Devices Co., LTD. R1131N321A-TR-FE Linear Voltage Regulators applications.