Demonstration circuit 687 is a low input voltage and ultralow dropout voltage power supply using the LT3020 100mA linear regulator in the small 8-Pin 3x3 DFN package. The DC687 has an input voltage range from 1V to 10V, and a jumpers-selectable output voltage that can be set to 1.2V, 1.5V, 1.8V or a user-defined value between 0.2V and 10V minus the dropout voltage. With its low 0.2V reference, the LT3020 is capable of supplying power to very low voltage applications, such as (relatively) high current voltage references.