Microchip expands space power portfolio with new GaN PoL converter - Aerospace Manufacturing magazine

Microchip's space-grade GaN PoL launch is less a product extension than a strategic lock-in on next-gen satellite power architecture. Technically, PoL is the final power-conversion stage. Replacing Si with GaN here forces a full topology redesign. Si caps at ~92% efficiency at 100-400V; GaN cuts switching losses 30%+, freeing thermal headroom. In orbit, every 10 grams saved means exponential launch-cost reduction. Upstream, Wolfspeed and Sumitomo's GaN substrate capacity becomes the binding constraint. Downstream, SmallSat builders see 40% power-module volume reduction, rewriting BOM economics. Compliance-wise, radiation-hardening certification (MIL-PRF-38534 or equivalent) takes 18-30 months—a moat that also caps production flexibility. GaN epi-wafer supply remains concentrated in the US and Japan; tighter export controls would strand non-US aerospace players with designs but no wafers. Competitively, TI's two-decade space-power depth means Microchip's move will trigger a TI counter-product within 2025. Navitas holds deep GaN IP but lacks systematic space certification—giving Microchip a 12-18 month window before the landscape hardens. Outlook: over 24 months, LEO constellation acceleration will push space power from "adequate" to "extreme efficiency." GaN PoL penetration should jump from under 5% to 25%+, with SiC complementing at >1kW. Microchip's real play isn't one chip—it's anchoring the reference design standard for next-gen satellite power.