Infineon Acquires AI Power Chip Firm C2i Semiconductor

According to Infineon Technologies, the company has completed its acquisition of Bengaluru-based C2i Semiconductor, although the financial terms of the transaction were not disclosed. The acquisition brings digital power control technologies designed for AI data centers and high-performance computing (HPC) systems into Infineon's portfolio. It also integrates C2i's engineering team into Infineon's Power Systems business and expands the company's research and development capabilities in India.

The acquisition highlights the growing importance of power management as AI processors drive higher server power densities and demand faster transient responses. It also reflects the industry's shift toward combining wide-bandgap power semiconductors with digital control and software to improve power delivery from the grid to the processor core.

C2i Semiconductor specializes in software-defined multiphase controllers, intelligent power stages, and system-level power architectures. Infineon plans to integrate these capabilities with its existing portfolio of silicon, silicon carbide (SiC), and gallium nitride (GaN) power semiconductors.

Software-defined power systems use digital control techniques and algorithms alongside power semiconductors to adjust power conversion and regulation in real time. This approach is becoming increasingly important in AI servers, where processors can generate large and rapidly changing power demands. By responding more precisely to sudden load variations, these systems aim to improve energy efficiency, reduce power losses, and maintain stable operation.

Infineon said the acquisition strengthens its ability to develop end-to-end power architectures covering the entire power delivery path, from the grid to the processor core. The combined team will also focus on vertical power delivery and the development of future substrate-integrated voltage regulators (SIVRs).

These technologies aim to position voltage regulation closer to high-power processors, helping meet the increasing current demands and tighter efficiency requirements of next-generation AI accelerators. As AI workloads continue to expand, advanced power delivery architectures are becoming a critical component of data center infrastructure.

The transaction also expands Infineon's engineering operations in Bengaluru, which the company regards as an important research and development hub for digital power technologies. Infineon currently employs approximately 2,800 people in India, and the acquisition further strengthens its engineering presence in the country.