用于AI供电的多芯片多相DC-DC变换器：环形、链式还是网络结构，独立运行还是主从控制？

Motivation.As artificial intelligence(AI)workloads esca-late exponentially,ultra-thin,high-efficiency voltage regula-tor modules(VRMs)with exceptional power density become essential for backside-mounted configurations[1].Thus,high-density multiphase DC-DC converters are pivotal for imple-menting vertical power delivery(VPD)architectures in XPU platforms.Strategically positioning these converters beneath processors and maximizing spatial utilization enables core rail currents exceeding 2 kA while significantly reducing the power distribution network(PDN)losses compared to conven-tional solutions.The VPD configuration elevates system-level energy efficiency with>100 W power saving per processor,yielding megawatt-scale savings in a datacenter that uses～100 000 processors.The synergy of 48 V power conversion architectures and advanced packaging techniques enables the industry's commitment to balancing computational demands with CO2 emission reduction and environmental sus-tainability.