Intel Corp (INTC)

[jokerman]

Haswell FIVR paper

https://www.deepdyve.com/lp/institute-of-electrical-and-electronics-engineers/fivr-fully-integrated-voltage-regulators-on-4th-generation-intel-core-W88eUoKR43

You can get a 5 minute preview for free.
I'm sad to see FIVR go away.


Anyway, Skylake may still have some kind of IVRs on the die, just a less broad implementation (i.e using IVRs only for quick voltages changes for each core and to ultra low voltages).
Also, FIVR uses buck convertes with package inductors. They may have decided that buck convertes with thick metal inductors, linear regulators or switching-cap converters are better suited for this task.

See this VLSI 2014 paper:

A 500 MHz, 68% Efficient, Fully On Die Digitally Controlled Buck Voltage Regulator on 22nm Tri-Gate CMOS