I have a regulator on an Arduino Mini Pro board (Chinese clone) which should be a 3V3, but it seems it's a 5V one (by measured voltage). The markings on the component are BALG. Does anyone know what it is?

I have a regulator on an Arduino Mini Pro board (Chinese clone) which should be a 3V3, but it seems it's a 5V one (by measured voltage). The markings on the component are BALG. Does anyone know what it is?

Edit: have added a picture of the board. I need a 3V3 one because I have a communication board that requires that voltage.