Patent ID: 8760134

Claim:
A power supply system, comprising: controller circuitry configured to generate a pulse width modulation (PWM) signal; driver circuitry configured to generate a complimentary PWM signal based on the PWM signal; power switch circuitry comprising a high side power switch and a low side power switch coupled to an input power voltage rail; wherein the conduction state of the high side power switch is controlled by the PWM signal and the conduction state of the low side power switch is controlled by the complimentary PWM signal; and wherein the power switch circuitry is configured to generate a switched power output; an inductor configured to receive the switch power output and generate an output voltage to deliver power to a load coupled to the inductor; and inductor current simulation circuitry comprising a capacitor, charge/discharge circuitry, and error correction circuitry; wherein the charge/discharge circuitry is configured to charge the capacitor with a current that is proportional to the input voltage rail and discharge the capacitor with a current that is proportional to the output voltage; and wherein the error correction circuitry is configured to adjust the charge on the capacitor based on an instantaneous current of the inductor; and wherein the voltage on the capacitor is proportional to a current associated with the inductor.