On the Linear IC itself, there are 4 terminations. There are a total of 4 pins on this board. Chips have 4 pins. There is one type of regulator for this device, which is FIXED POSITIVE SINGLE OUTPUT STANDARD REGULATOR.
LP3990TLX-1.5 Features
LP3990TLX-1.5 Applications
There are a lot of Texas Instruments LP3990TLX-1.5 Linear Voltage Regulators applications.