TheTL431andTL432arethree-terminaladjustableshuntregulators,withspecifiedthermalstabilityoverapplicableautomotive,commercial,andmilitarytemperatureranges.TheoutputvoltagecanbesettoanyvaluebetweenVref(approximately2.5V)and36V,withtwoexternalresistors(seeFigure17).Thesedevicesh***eatypicaloutputimpedanceof0.2Ω.Activeoutputcircuitryprovidesaverysharpturn-oncharacteristic,makingthesedevices)