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本文提出一种四相零占空比迟滞DC-DC转换器，针对应用处理器的大电流快速负载瞬态问题，实现了6A输出、40MHz开关频率，在5A/5ns负载跳变下仅产生118mV跌落和230ns响应时间，避免了传统大输出电容阵列的使用。
In recent years, the clock frequency, the number of cores, and the power dissipation of application processors (APs) for portable electronics have dramatically increased. As a result, peak processor currents have reached several amperes with slew rates on the order of 1A/ns. These fast large steps incur large output voltage (VOUT) droops, which induce failed paths and cause processor black-outs. Present voltage regulators (VRs) combat these challenges by using bulky output capacitor (COUT) arrays that could add up to over 100μF. However, this practice is untenable for next-generation APs, which have severely limited PCB area and require fast dynamic voltage scaling. These challenges have led to great demand for ultra-fast VRs. PWM control requires a bandwidth 5 to 10× less than the switching frequency, fSW, which results in a slow response
Min Kyu Song, Joseph Sankman, Dongsheng Ma
University of Texas, Dallas, Richardson, TX