AI server VRM shifts drive power shortages and stretch lead times past 6 months

The AI server boom is triggering a full-stack redesign—from GaN/SiC adoption to PCB layer count—as native multiphase VRM architectures replace legacy dual-rail designs. This shift, combined with depleted inventories and supply chain decoupling from mainland China, has stretched lead times beyond six months. U.S. and Taiwan, China-based power IC vendors are leveraging the crunch to lock in long-term OEM agreements, erecting de facto technical moats. Competitors like Infineon and TI face limited near-term substitution risk, but NVIDIA and AMD ecosystem partners are fast-tracking secondary sourcing. Over the next 18 months, VRM scarcity will push server makers toward vertical integration of power modules, catalyze custom PMIC development, and accelerate RISC-V firmware adoption in power management—creating a new software-defined barrier to entry.