EDN Magazine — 04.13.95 Pass regulator's output ranges from 0 to 20V (figure)

FIGURE 2

Fig 2—To make a pass regulator that's adjustable down to 0V, this circuit uses a stand-alone bandgap reference to translate the output of an adjustable regulator up to a "virtual V_OUT" and then uses this virtual V_OUT as the top of the feedback divider.