Patent ID: 9541974
Date: 2017-01-10
CPC Classifications: G06F,H02M

Claim:
1. A voltage converter that drives a load, comprising: a reference controller, coupled to receive a transition control associated with a target supply voltage needed to drive the load, the reference controller generating a DAC control signal and a step control signal; an internal digital-to-analog converter (DAC), coupled to the reference controller, the internal DAC being controlled by the DAC control signal to generate a reference voltage, the reference voltage being varied from a first voltage to a second voltage within a supply voltage transition, the first and second voltage being associated with the target supply voltage prior to and subsequent to the supply voltage transition, respectively; a compensation circuit coupled to the internal DAC, the compensation circuit compensating an offset of the reference voltage for a compensated reference voltage, the offset being caused by a voltage drop associated with a local ground of the load; a switching regulator, coupled to the compensation circuit, the switching regulator generating an output supply voltage that tracks the compensated reference voltage at a slew rate; and wherein a supplemental voltage step is introduced to the compensated reference voltage under the step control signal during the supply voltage transition and deducted from the compensated reference voltage once the load is driven by the target supply voltage.