Why can't wall power go straight to an AI chip?

The chip needs a much lower voltage than the wall supplies, and far more current. A voltage regulator does that conversion.

Picture a laptop on a desk. You plug it into the wall, but the processor never sees wall power. A chain of small parts steps the voltage down until it matches what the chip can take. The last step happens right next to the processor.

For AI chips that last step is hard. Krishna of power-chip maker Empower Semiconductor told Electronic Design that "1 V is yesterday, 0.8 V is today, and 0.5 and 0.6 V is the future for high-performance ASICs." The magazine adds that these chips "require hundreds to thousands of amps of current." Empower sells regulators, so read this as an industry view. The physics is basic: power is voltage times current, so a low voltage means a huge current. Wire resistance turns some of that power into heat on the way, and at these currents the loss adds up. So the distance from the regulator to the chip starts to matter.

Power delivery is also changing upstream, inside the data hall. Nexairi's Substack looked at one company's announced 800-volt power system for a data center in China, and at what that company has not disclosed.

Building Server Board Chip package regulator beside the chip regulator inside
A simplified explanation of where the last conversion step can sit. It is not Ferric's product diagram.

What did onsemi actually agree to buy?

onsemi agreed to buy Ferric, a maker of integrated voltage regulators, for $600 million in cash plus up to $175 million more tied to revenue milestones.

The 8-K filing calls the first payment "aggregate consideration of $600.0 million in cash, subject to customary purchase price adjustments." The extra $175 million depends on "certain specified revenue milestones." The filing does not list them.

Question What the documents say
What is the price? $600 million cash at closing, subject to adjustments. Up to $175 million more on revenue milestones.
Is it done? No. onsemi "currently expects the Merger to close in the fourth quarter of 2026," subject to conditions including a U.S. antitrust waiting period.
Who joins onsemi? About 50 Ferric employees, mostly in New York and Silicon Valley, per the release.
Which customers or products? The release names none.

In the same release onsemi says it raised its 2030 AI data center revenue target by $500 million, to more than $3 billion. That is a goal, not a result.

Why put the regulator inside the chip package?

The idea is to shorten the path. The closer the final conversion sits to the processor, the less power the wiring wastes on the way.

Ferric's regulator, the release says, "integrates the power controller, FETs, inductors and capacitors into a single compact package." A FET is a tiny electronic switch. The release says the industry is moving regulation closer to the processor to "reduce losses, increase power density and respond faster to rapidly changing power demands."

There is a practical reason too. A regulator made of separate parts needs room on the circuit board. Krishna said "sometimes the parts are so tall that you can't physically get any closer because the heatsink blocks them." A regulator built into the package skips that problem.

Now the number. onsemi says the design "reduces board area by 50-70% compared with conventional discrete voltage regulator solutions." That is a claim about space on the board. It says nothing about how much electricity the system saves.