Patent ID: 7635925

Claim:
A system comprising: a first current path providing a first current I 1 between a first supply node and an output node; a second current path providing a second current I 2 between a second supply node and the output node; and a control circuit to regulate a voltage at the output node by supplying a control signal to each current path, the control circuit being operable to divide a current supplied to the output nodes along said current paths when a difference between a voltage at the first supply node and a voltage at the second supply node falls within a voltage range, the division defined by a function characterized by three regions bound by two threshold voltage levels including a first, second and third region where I 1 >I 2 in the first region, I 1 =I 2 in the second region, and I 1 <I 2 in the third region, and otherwise to supply substantially all the output current from the supply node with the higher voltage.