Patent ID: 8912778

Claim:
A switching voltage regulator operable to regulate a supply voltage to a load, the switching voltage regulator comprising: (a) a charging element operable to generate an output voltage; (b) switching circuitry coupled to the charging element; and (c) switch control circuitry operable to control the switching circuitry to configure the charging element during a cycle, including to charge the charging element for an on-time, discharge the charging element for a discharge time, and tristate the charging element for a tristate time, and further operable to: initialize the on-time to a first on-time; measure a first switch time comprising the first on-time and a first discharge time of a first cycle; measure a first tristate time of the first cycle; determine a first ratio of the first tristate time to the first switch time; compare the first ratio to a first ratio threshold; decrease the on-time to a second on-time when the first ratio exceeds the first ratio threshold; and prior to a power mode changing which increases the current demand of the load, increase the on-time.