The Last 1.5mm of AI Power: Three Numbers From Vicor’s Q1 2026 Earnings Call

Key Takeaways

• Package thickness 1.5 mm, well below the 3 mm industry target
• Current density 3 A/mm² enables denser power modules
• VPD achieves up to 40× current multiplication, reducing bus current
• Fab capacity expansion aims to lift revenue potential to $1.5 B annually
• Vicor dismisses 800 V‑to‑6 V bus architecture as structurally flawed

Pulse Analysis

AI data centers now consume upwards of 100 kW per rack, making power‑delivery efficiency a critical performance factor. Traditional voltage regulators struggle with heat and I²R losses, especially as current scales. Vicor’s second‑generation Vertical Power Delivery (VPD) tackles this by packing 3 A per square‑millimeter into a 1.5 mm module, dramatically shrinking the distance between the 48‑V bus and the sub‑volt processor rails. The 40× current multiplication means a 2 kA processor draw can be fed by a modest 50 A bus, slashing conductor size, reducing copper losses, and simplifying thermal management for dense GPU clusters.

The technical leap is underpinned by Vicor’s fab‑capacity strategy. By accelerating cycle times and repurposing existing space, the Andover facility can boost annual revenue capacity from $1 B to $1.5 B, supporting a backlog that jumped 70% to $301 M. This elasticity allows the company to meet the surge from hyperscalers and wafer‑scale engine makers without the long lead times of new construction. The upcoming 3Di interconnect line and a planned second fab further future‑proof the supply chain, ensuring Vicor can scale alongside the AI compute boom.

Industry debate has centered on an 800 V‑to‑6 V bus architecture, which Vicor’s leadership labeled structurally misguided. The high‑voltage approach adds conversion stages and raises safety concerns, while Vicor’s VPD keeps the voltage swing modest and leverages current multiplication for efficiency. As AI workloads demand ever‑higher power density, customers are likely to favor solutions that minimize loss, footprint, and thermal stress—attributes Vicor claims to deliver. If the company can sustain its capacity expansion and maintain its performance edge, it stands to capture a sizable share of the emerging AI power‑delivery market.