In total, there are 3 terminations on the gadget. There are 3 pins in total on this board. In this case, the regulator type is FIXED POSITIVE SINGLE OUTPUT STANDARD REGULATOR, which corresponds to this voltage regulator IC.
TA7809F(TE16L) Features
TA7809F(TE16L) Applications
There are a lot of Toshiba TA7809F(TE16L) Linear Voltage Regulators applications.