Listen to this articleEpic Microsystems, a San Jose-based semiconductor startup developing hybrid switched-capacitor vertical power delivery solutions for AI data centers, raised $21 million in an oversubscribed Series A round, led by Seligman Ventures, bringing its total funding to $26 million.
Epic Microsystems has raised $21 million in an oversubscribed Series A funding round, bringing its total capital raised to $26 million. The round was led by Seligman Ventures with participation from Intel Capital, AICONIC Ventures, Cambium Capital, and existing seed investors including A&E Investments, Assam Ventures, and Nepenthe Capital. Lip-Bu Tan, CEO of Intel and a long time semiconductor industry leader, participated as a seed investor.
What is Epic Microsystems?
The San Jose, California-based semiconductor company develops advanced power delivery solutions specifically for AI infrastructure. It emerged from stealth with this announcement, highlighting its hybrid switched-capacitor (HSC) vertical power delivery architecture. This technology targets the escalating power demands of AI data centers, where rack densities are approaching one megawatt. Traditional inductor based DC-DC power solutions are hitting physical and architectural limits in efficiency, thermal management, current density, and rack integration. Epic’s approach replaces bulky inductors with a compact mix of capacitors and optimized components, delivering higher efficiency, superior current density, reduced heat dissipation, and a low profile design optimized for z-height constraints. This enables hyperscalers to avoid performance per watt and performance per dollar trade-offs while supporting next generation AI accelerators and GPUs in multi-megawatt environments.
The founding team consists of power semiconductor veterans with proven commercialization expertise. Co-founder and CEO Sabin Eftimie previously led the DC-DC power engineering team at Dialog Semiconductor (acquired by Renesas), accumulating nearly 25 years of experience in high performance ICs and more than a decade focused on hybrid switched-capacitor designs; he holds a PhD from the University Politehnica of Bucharest. Co-founder and COO Wonyoung Kim previously founded and led Lion Semiconductor, which was acquired by Cirrus Logic in 2021 for $335 million. The broader team, which now numbers around 30 employees across three continents, has direct experience scaling switched-capacitor power solutions into high volume production for fast charging in hundreds of millions of smartphones and laptops. This background provides a clear track record of transitioning advanced power architectures from innovation to mass deployment.
Funds from the Series A will accelerate development and commercialization of the vertical power delivery platform, support operational expansion, and grow the engineering team (with plans to double headcount by the end of 2027). Initial commercial deployments in AI data centers are targeted for late 2027 or 2028. As part of the round, Umesh Padval, Managing Partner at Seligman Ventures, has joined the board of directors, adding deep semiconductor operating and investing expertise. Additional board and executive support includes Andrew Tan of A&E Investments.
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The timing aligns with the AI compute roadmap being shaped as much by power delivery breakthroughs as by advances in AI silicon itself. Power density, efficiency, and thermal management have become primary bottlenecks for hyperscalers scaling infrastructure. Epic’s HSC architecture addresses these constraints simultaneously, offering greater architectural flexibility for future rack densification and multi megawatt AI systems. Investors emphasize the founder market fit: the team’s deep switched-capacitor innovation combined with proven data center requirements understanding positions the company to unlock the next decade of AI performance without forcing compromises elsewhere in the system.
The round reflects strong conviction in Epic Microsystems’ ability to deliver a foundational layer of AI infrastructure innovation. With silicon proven technology, an experienced leadership team that has already scaled similar architectures to volume, and a high caliber investor syndicate anchored by Seligman Ventures and Intel Capital, the company is well capitalized to move from development to commercial shipments while capturing value in the rapidly expanding AI power ecosystem.
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