Patent ID: 8283907

Claim:
A method comprising: receiving an input voltage at a voltage regulator, the voltage regulator comprising an inductor; generating an output voltage using the voltage regulator; controlling a current through the inductor using a current limit reference; and modulating the current limit reference based on the input voltage and the output voltage, wherein modulating the current limit reference comprises: generating a reference current, the current limit reference based on the reference current; and modulating the reference current based on the input and output voltages, and wherein: the reference current is based on a product of a first input current and a second input current the first input current is based on the output voltage; and the second input current is based on the input and output voltages, the first input current is based on the output voltage; the second input current is based on a difference between the output voltage and the input voltage; and the reference current is based on a square root of a product of (i) the output voltage and (ii) the difference between the output voltage and the input voltage.