Hi,
Apparently some new Intel CPU's are being tested with on board voltage regulators (2.4V input buck converters for CPU power rails). Whats really surprising is these voltage regulators include the power mosfets and also the inductors, and possibly even the capacitors I'm not sure!
The efficiency right now is only about 80% for the on die regulator, which might be a deal killer I'd say, plus it is eating up expensive real estate on the CPU die, and adding heat. But I wonder how long until IR.com has a programmable one of these on their site?
Here are the links to the story and a pdf of the technology:
cheers, Jamie