The mega Internet data center is the proving ground for power integrity questions these days. The massive server farms must be located next to power substations to get the juice they need, so every joule counts. Just how the power gets passed around efficiently is a high art.
Google engineers return to DesignCon this year to share some of their secrets of power managemen
t on a grand scale. Their paper talks about driving server processors at higher than the recommended 12V to get new levels of power efficiency.
In its turn, Intel will give a paper on power analysis tools
useful for a wide range of designs from SoCs to servers. When the event is over, I expect to have a better handle on the state of the art in power integrity.