A Tape & Reel (TR) case is used to deliver the Voltage Regulated IC. As you can see, the IC chip has 5 terminations. There are 5 pins in total in this voltage regulator IC. It is important to note that this device has a FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR regulator type.
R1131N091D-TR-FE Features
R1131N091D-TR-FE Applications
There are a lot of RICOH Electronic Devices Co., LTD. R1131N091D-TR-FE Linear Voltage Regulators applications.