Article: Power Delivery in a Modern Processor
By: dmcq (dmcq.delete@this.fano.co.uk), May 12, 2020 1:05 pm
Room: Moderated Discussions
Travis Downs (travis.downs.delete@this.gmail.com) on May 12, 2020 7:53 am wrote:
> A nice read!
>
> What is the purpose of the LDO? Does it even reduce power draw? The voltage drop is a dead loss
> in an LDO, in the sense that the reduced power I * (Vin - Vout) is just dissipated in the regulator,
> but is there a secondary effect that saves power? Or is it just to better control the voltage
> for another purpose (one could be to move power dissipation away from the core)?
>
>
>
>
> I believe "power" should be "voltage" in that sentence.
There doesn't seem to be much said about asynchronus CPU's lately. I'd have thought they would solve a lot of these problems. Any idea what it is that's the big problem stopping that sort of design being used?
> A nice read!
>
> What is the purpose of the LDO? Does it even reduce power draw? The voltage drop is a dead loss
> in an LDO, in the sense that the reduced power I * (Vin - Vout) is just dissipated in the regulator,
> but is there a secondary effect that saves power? Or is it just to better control the voltage
> for another purpose (one could be to move power dissipation away from the core)?
>
>
>
One advantage of the FIVR is that the power from the motherboard VRMs
> to the processor is about twice as high as in a conventional system.
>
> I believe "power" should be "voltage" in that sentence.
There doesn't seem to be much said about asynchronus CPU's lately. I'd have thought they would solve a lot of these problems. Any idea what it is that's the big problem stopping that sort of design being used?
