Patent ID: 7358710

Claim:
A DC-to-DC converter having temperature-compensated inductor direct current resistance (DCR) dynamic current sensing, comprising: an inductor having an inductance and a direct current resistance (DCR), wherein the DCR has a positive temperature coefficient (PTC); a control switch coupled to the inductor and an input voltage; a synchronous rectification switch coupled to the inductor and a common reference; a switching regulator controller coupled to the control and synchronous rectification switches, wherein the switching regulator controller controls the control and synchronous rectification switches so as to produce a regulated output voltage from the inductor; a current sensing capacitor coupled to the inductor, wherein a voltage across the current sensing capacitor is substantially proportional to a current through the inductor; and a resistor network having a negative temperature coefficient (NTC) is coupled to the inductor and the current sensing capacitor, wherein a combination of the NTC resistor network and the current sensing capacitor have a time constant substantially the same as a time constant of a combination of the inductance and the DCR of the inductor over a desired operating temperature range.