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An analytic method to evaluate frequency dependent losses in on-chip DC-DC buck converters is presented in this paper. Microprocessors or chipsets exhibit wide dynamic range of load current varying from 50mA up to 1.5 A per phase at full operation. Peak efficiency is shown to occur when the load current related losses and the inherent losses of the DC-DC converter are equal. Efficiency optimization...
An analytic method to evaluate frequency dependent losses in on-chip DC-DC buck converters is presented in this paper. These converters feature high switching losses caused by the skin effect in the package inductors. The frequency dependent air-core inductor model is shown to be critical in determining the optimal switching frequency. A general RLC parameter extraction method is also described. Considering...
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