Does the current in adjustable voltage regulators changes?
This shows a common misconception about regulators. You can't control the current, and voltage at the same time, and this is why:

Think about your regulator like a water valve. The water flow is current, and the pressure is voltage. You can buy a regulator that controls current, or voltage; but either way it's just a "valve" and the most it can do is go all the way open, or all the way closed.

Switching regulators are more complicated, but we won't get into that now. Suffice to say, you can't control output current and voltage with those either.

So back to the "valve". From this analogy, you can see there's a few things your regulator simply cannot do.


If there's not enough pressure or flow available at the input, the regulator will open up as far as it can, but the target flow or pressure will not be reached. It'll just pass through whatever's available (with some losses due to the valve itself).
The pressure, and flow at the output are related directly to each other. If you force x gpm of liquid to flow, then the "push back" will by y psi. Your regulator can't do anything about that. It can try to control the flow into the output, or the pressure; but if it's controlling one, the other is being forced to a corresponding value.


Side note: A voltage regulator will also have a current rating. This doesn't mean it controls the current, it just means that if more than that current flows trough it, it will be damaged. You have to make sure that doesn't happen.