Patent ID: 8164218

Claim:
A single inductor multiple output (SIMO) system, comprising: a plurality of output terminals; a plurality of switches operatively coupled to the output terminals; a first control loop configured to control a peak current in the SIMO system; wherein the first control loop comprises: a peak-current control value setting circuit configured to receive multiple sensed output of the SIMO system; a slope signal generator configured to provide a slope signal and a clock signal; an adder configured to receive a sensed current of the SIMO system at one input terminal and to receive the slope signal at another input terminal; a first comparator configured to receive the output of the peak-current value setting circuit at one input terminal, and to receive the output of the adder at another input terminal; a first logic circuit configured to receive the output of the first comparator at one input terminal, and to receive the clock signal at another input terminal; and a second logic circuit configured to receive a first output of the second control loop at a first input terminal, to receive a second output of the second control loop at a second input terminal, to receive the output of the first logic circuit at a third input terminal, and to provide multiple control signals to control terminals of the multiple switches, respectively; and a second control loop electrically coupled to the first control loop, the second control loop being configured to control a duty-cycle difference between the switches to achieve a desired voltage at the individual output terminals.