Method and an apparatus to adjust duty cycle for voltage supply regulation

A system comprising:

• a step-down direct current (DC) to DC switching voltage regulator;
• and
• an integrated circuit coupled with the step-down DC to DC switching voltage regulator, the integrated circuit including
• a voltage regulator controller coupled to the step-down DC to DC switching voltage regulator to input at least one time-modulated signal to the at least one time-modulated signal having a duty cycle, the voltage regulator controller including a circuit receiving an input value substantially proportional to an input voltage, wherein the circuit is used to adjust the duty cycle of the at least one time-modulated signal, wherein the voltage regulator controller comprises a shift register to shift a number representative of a value of the input voltage.

A method comprising:

• receiving an output voltage generated from an input voltage in response to at least one time-modulated signal;
• powering load circuitry with the output voltage;
• counting by an increment value substantially proportional to the input voltage to adjust a duty cycle of the at least one time-modulated signal;
• and
• adjusting the duty cycle of the at least one time-modulated signal in response to a change in the input voltage to cause the output voltage to remain substantially constant, wherein adjusting the duty cycle of the at least one time-modulated signal comprises
• using a counter to count by the increment value, and
• causing the at least one time-modulated signal to transition from a first logic value to a second logic value when a count from the counter reaches a predetermined value.

A machine-accessible medium that provides instructions that, if executed by a processor, will cause the machine to perform operations comprising:

• receiving an output voltage generated from an input voltage in response to at least one time-modulated signal;
• powering load circuitry with the output voltage;
• counting by an increment value substantially proportional to the input voltage to adjust a duty cycle of the at least one time-modulated signal;
• and
• adjusting the duty cycle of the at least one time-modulated signal in response to a change in the input voltage to cause the output voltage to remain substantially constant, wherein adjusting the duty cycle of the at least one time-modulated signal comprises
• using a counter to count by the increment value, and
• causing the at least one time-modulated signal to transition from a first logic value to a second logic value when a count from the counter reaches a predetermined value.

A system comprising:

• a step-down direct current (DC) to DC switching voltage regulator;
• and
• an integrated circuit coupled with the step-down DC to DC switching voltage regulator, the integrated circuit including
• a voltage regulator controller coupled to the step-down DC to DC switching voltage regulator to input at least one time-modulated signal to the at least one time-modulated signal having a duty cycle, the voltage regulator controller including a circuit receiving an input value substantially proportional to an input voltage, wherein the circuit is used to adjust the duty cycle of the at least one time-modulated signal, wherein the voltage regulator controller comprises one or more multipliers to multiply the input voltage by a predetermined value and the circuit comprises a counter.