Cross regulation reduction in single inductor multiple output (simo) switching dc-dc converters

A method, comprising:

• controlling an inductor configured to provide current to a plurality of output nodes by performing steps comprising:
• calculating an inductor current value based, at least in part, on a voltage at each node of a plurality of output nodes;
• calculating a duty cycle value associated with each of the plurality of output nodes based, at least in part, on a voltage at each node of the plurality of output nodes;
• controlling at least one main power switch to increase or decrease the current in the inductor based, at least in part, on a calculated inductor current value;
• and
• controlling at least one output power switch to divert current from the inductor to one of the plurality of output nodes based, at least in part, on the calculated duty cycle value associated with each of the plurality of output nodes.

An apparatus, comprising:

• a controller for regulating a DC-DC converter to generate a DC voltage at each node of a plurality of output nodes sharing an inductor by adjusting an average current of at least one node of the plurality of output nodes while maintaining an average current at other nodes of the plurality of output nodes, wherein the controller is configured to perform steps comprising:
• calculating an inductor current value based, at least in part, on a voltage at each node of the plurality of output nodes;
• calculating a duty cycle value associated with each of the plurality of output nodes based, at least in part, on a voltage at each node of the plurality of output nodes;
• controlling at least one main power switch to increase or decrease the current in the inductor based, at least in part, on a calculated inductor current value;
• and
• controlling at least one output power switch to divert current from the inductor to one of the plurality of output nodes based, at least in part, on the calculated duty cycle value associated with each of the plurality of output nodes.