New article: Power Delivery in a Modern Processor

Article: Power Delivery in a Modern Processor
By: Ricardo B (ricardo.b.delete@this.xxxxx.xx), May 15, 2020 5:06 am
Room: Moderated Discussions
Michael S (already5chosen.delete@this.yahoo.com) on May 14, 2020 12:29 pm wrote:
> Ricardo B (ricardo.b.delete@this.xxxxx.xx) on May 13, 2020 11:47 pm wrote:
> > Jason Creighton (asdf.delete@this.example.com) on May 13, 2020 9:09 am wrote:
> > > Dan Fay (daniel.fay.delete@this.gmail.com) on May 12, 2020 9:35 am wrote:
> > > > Do you know what the dropout voltage is for the on-die LDO(s)?
> > >
> > > I don't. You can get discrete LDOs with 100 mV or 200 mV dropouts, but I have no
> > > idea what they're able to accomplish on-die in a digital-optimized process.
> >
> > It can go as low as 35 mV for smaller currents (100 mA).
> >
> > I think values for fully integrated LDO are similar.
>
> After reading your post I asked about it one of our board designer that recently
> was busy developing a board with very challenging supply requirements.
> He told me that linear regulators with very low drop certainly exist, but they have one big disadvantage
> - they poorly reject medium frequency noise (200 KHz to few MHz) when it comes from input voltage
> side. Only those with drop of 300 mV or more are filtering incoming ripples really well.
>
> But, then again, he probably don't care all that much about regulators with small output current.

Or more to the point: your board engineer probably cares a lot more about such noise than people designing power supplies for CMOS logic.


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TopicPosted ByDate
New article: Power Delivery in a Modern ProcessorDavid Kanter2020/05/11 07:37 AM
  New article: Power Delivery in a Modern ProcessorMaynard Handley2020/05/11 10:03 AM
    Buried power rails, super vias, etc.David Kanter2020/05/11 11:44 AM
      Buried power rails, super vias, etc.Maynard Handley2020/05/11 06:06 PM
  InductorsMoritz2020/05/11 12:01 PM
    InductorsDavid Kanter2020/05/11 12:36 PM
  New article: Power Delivery in a Modern ProcessorTravis Downs2020/05/12 07:53 AM
    New article: Power Delivery in a Modern ProcessorJason Creighton2020/05/12 09:15 AM
      New article: Power Delivery in a Modern ProcessorDan Fay2020/05/12 09:35 AM
        New article: Power Delivery in a Modern ProcessorJason Creighton2020/05/13 09:09 AM
          New article: Power Delivery in a Modern ProcessorRicardo B2020/05/13 11:47 PM
            New article: Power Delivery in a Modern ProcessorMichael S2020/05/14 12:29 PM
              New article: Power Delivery in a Modern Processoranon³2020/05/14 05:22 PM
              New article: Power Delivery in a Modern ProcessorRicardo B2020/05/15 05:06 AM
                New article: Power Delivery in a Modern ProcessorMichael S2020/05/15 05:13 AM
      New article: Power Delivery in a Modern ProcessorTravis Downs2020/05/13 03:01 PM
    LDO power savingDavid Kanter2020/05/12 10:16 AM
      LDO power savingYoav2020/05/13 03:56 AM
        LDO power savingTravis Downs2020/05/13 06:44 AM
          LDO power savingDan Fay2020/05/13 07:03 AM
            LDO power savingTravis Downs2020/05/13 03:02 PM
              LDO power savingRicardo B2020/05/14 12:08 AM
    Asynchronous CPU?dmcq2020/05/12 01:05 PM
      Hindered by device testing and design validationPaul A. Clayton2020/05/12 02:13 PM
        Hindered by device testing and design validationMark Roulo2020/05/13 08:22 AM
          Hindered by device testing and design validationAnon32020/05/14 07:06 AM
  Work scheduling for moderating powerPaul A. Clayton2020/05/12 10:15 AM
    Work scheduling for moderating powerDavid Kanter2020/05/12 10:40 AM
      Work scheduling for moderating powerPaul A. Clayton2020/05/14 09:27 AM
    Work scheduling for moderating powerTravis Downs2020/05/12 01:25 PM
      That is certain one real world example (NT)Paul A. Clayton2020/05/14 09:28 AM
  New article: Power Delivery in a Modern ProcessorDanjel McGougan2020/05/13 06:52 AM
    New article: Power Delivery in a Modern ProcessorTravis Downs2020/05/13 03:07 PM
      New article: Power Delivery in a Modern ProcessorRob Thorpe2020/05/15 06:36 PM
        New article: Power Delivery in a Modern ProcessorRicardo B2020/05/15 10:31 PM
  Bypassing capacitors & testingRob Thorpe2020/05/15 06:54 PM
  New article: Power Delivery in a Modern ProcessorRicardo B2020/05/15 10:22 PM
    New article: Power Delivery in a Modern ProcessorDavid Kanter2020/05/16 09:03 AM
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