I have a board that has components requiring both 5v and 3.3v supply. The unit is supposed to be powered from a 12v or 24v battery. Can anyone suggest such a dual output DC/DC converter? Needs to be PCB mounted and of course inexpensive... (and should preferable handle polarity changes in source). Apart from the above, if BOM cost is to be minimized, would it be better to build it from discretes or not worth the hassle?
Thanks!