Circuit diagram for an adjustable current regulator

Hello forum,

Does anyone have a circuit diagram for an adjustable current regulator?

I need an adjustable current regulator for a battery charger circuit. It should be able to handle 2.5A and the input voltage is up to 25V or so.

I've been looking, but couldn't find anything useful.

If you got some circuit using the LM317 or the LM337 and a pass transistor, this would be ideal, since I got these parts already.

Regards,
Futterama

The LM338T or LM338K can probably do this quite easily, it may be detailed in thier datasheets.