If ADJ is the suffix of the model, it indicates that this is a model with adjustable output voltage, if ADJ is the code for discipline, then this pin is a voltage regulator pin.
If ADJ is the suffix of the model, it indicates that this is a model with adjustable output voltage, if ADJ is the code for discipline, then this pin is a voltage regulator pin. Some types of switching regulators can be boosted, while others can only be reduced. For a voltage regulator with a fixed 12V output, the suffix is usually -12 or 012.