Semiconductor startup C2i Semiconductors has extended its Series A funding round to $16.7 million, with TDK Ventures participating in both the original raise and the oversubscribed extension.

The Bengaluru-based startup had secured $15 million in the first tranche of its Series A round led by Peak XV Partners, with participation from Yali Deeptech and TDK Ventures, in February this year. Prior to that, it had raised $4 million from deeptech venture fund Yali Capital in November 2024. The fresh capital will be used to expand operations and accelerate product development efforts, C2i Semiconductors said in a press release.

C2i’s differentiation lies in its proprietary intellectual property powering its products. Its platform includes the Manas Controller, a software-defined controller with a unique control architecture that is agnostic to PDN changes and processor requirements. The Sarayu Power Stage and Modular Scalability architecture enable flexible phase operations for higher-current applications, while also supporting VPD architecture and voltage regulators (VRs). The startup recently announced the tape-out of its smart power stage chip designed for AI infrastructure. The chip was developed end-to-end in India by the company’s in-house semiconductor engineering team.

According to market research, AI infrastructure capex is expected to reach $500–600 billion over the next 12–18 months and could grow to $1 trillion by 2030.

C2i’s platform is projected to deliver over 96% power conversion efficiency, compared to the 94% efficiency offered by incumbent solutions. In a 100 MW AI data centre, these gains, combined with reduced heat generation, could translate into nearly $12 million in annual energy savings. Additionally, the technology enables processors to run up to 4°C cooler, potentially extending the lifespan of AI hardware.

About C2i Semiconductor