IN Brief:
- onsemi has agreed to acquire Ferric for $600m, with up to $175m contingent on revenue milestones.
- Ferric integrates magnetic materials and power inductors with high-frequency voltage regulation circuitry.
- onsemi has increased its 2030 AI data centre revenue target by $500m to more than $3bn.
onsemi has agreed to acquire integrated voltage regulator developer Ferric for $600m in cash, with up to $175m in additional consideration dependent on revenue milestones. The proposed acquisition will add specialised magnetic materials, integrated inductors, and high-frequency power conversion technology to onsemi’s portfolio, extending its ability to address the demanding voltage regulation requirements of AI processors.
Ferric develops power regulation technology that places magnetic components close to the switching and control circuitry responsible for converting electrical energy. Its approach differs from conventional implementations in which the controller, switching devices, inductors, and supporting components occupy separate positions on a printed circuit board. Integrating these functions creates opportunities to reduce the dimensions and electrical losses of the paths through which regulated power reaches a processor.
High-performance processors require large currents at relatively low operating voltages. Their power demand can also change rapidly as computational activity varies, requiring the regulator to maintain the supply within an acceptable voltage range during transitions. The performance of the converter therefore depends on its control response, the characteristics of its switching devices, and the electrical impedance between its output and the semiconductor load.
That impedance includes resistance and inductance associated with conductors, connections, and packaging structures. Resistive losses increase with the square of the current, while parasitic inductance can contribute to voltage variation when current changes rapidly. Bringing regulation closer to the load can reduce parts of the distribution path, although the complete implementation must still accommodate electrical isolation where required, heat removal, and the physical arrangement of the processor package.
Ferric’s technology incorporates magnetic materials directly into semiconductor manufacturing processes, enabling power inductors to be formed alongside control circuitry. Inductors store and release energy during switching converter operation, making them essential components in many voltage regulation architectures. Their dimensions, losses, and current-handling characteristics influence both the physical footprint and efficiency of the resulting converter.
The company describes multiphase regulators operating at switching frequencies above 30MHz. In a multiphase arrangement, several conversion paths contribute to the required output current, with their switching operation coordinated to manage current delivery and output ripple. Increasing switching frequency can reduce the size of certain energy storage components, provided semiconductor losses, magnetic performance, and thermal conditions remain acceptable.
Ferric reports current densities of up to 5A/mm² for selected implementations and regulation bandwidth above 10MHz. These are company-stated capabilities of its integrated technology, rather than guaranteed performance characteristics for every customer design. Actual current delivery and transient response depend on the converter configuration, operating voltage, cooling arrangement, and processor power requirements.
The company also claims that its technology can reduce the area occupied by voltage regulation circuitry by 50–70% compared with conventional solutions. The comparison concerns the regulator implementation rather than the total dimensions of a processor board or server. It reflects the integration of magnetic components and associated circuitry into a more compact power conversion structure.
Physical integration is particularly demanding in modern processor assemblies, where computing dies, high-bandwidth memory, and dense interconnect structures compete for package area and thermal capacity. Locating power conversion close to the load can reduce the distance through which large currents must travel, but the design must also account for heat produced by the regulator and the interactions between power delivery and signal routing.
Ferric offers arrangements intended for different physical integration positions, including connections through the circuit board, package substrate, and locations close to the processor die. Each arrangement involves different electrical and mechanical constraints. A regulator placed near a processor may improve the power path while introducing additional packaging, assembly, or cooling requirements that must be addressed during system design.
onsemi already supplies semiconductor devices used in several levels of power conversion, from higher-voltage distribution stages to lower-voltage equipment supplies. Adding Ferric’s technology would extend that capability towards regulation located directly alongside the processor. The acquired expertise is therefore intended to complement the company’s established power semiconductor manufacturing and product development operations.
Ferric brings more than 40 patents and over a decade of engineering work covering integrated regulation and advanced magnetics. Approximately 50 employees, principally in New York and Silicon Valley, are expected to join onsemi when the acquisition closes. Their work will support further product development and the commercialisation of the technology through onsemi’s manufacturing and customer relationships.
The proposed transaction also changes onsemi’s longer-term expectations for AI infrastructure. It has raised its 2030 AI data centre revenue target by $500m to more than $3bn, reflecting the additional market opportunity it anticipates from integrated voltage regulation. This is a company forecast, rather than revenue already contracted or generated by Ferric products.
The $600m cash consideration is subject to customary purchase price adjustments, while the additional $175m will become payable only if the specified revenue milestones are achieved. onsemi intends to fund the transaction using existing cash and expects it to close before the end of 2026, subject to regulatory approval and other customary conditions. The business remains outside onsemi until completion.
Qualifying the acquired technology for commercial processor platforms will involve electrical validation, manufacturing repeatability, integration into the selected package architecture, and assessment of thermal and reliability performance. The proposed acquisition gives onsemi access to Ferric’s designs and expertise, while the extent of their contribution to future products will depend on successful integration and customer adoption.
