[SI-LIST] Re: PDS Resonance with LDO/Regulator
- From: steve weir <weirsi@xxxxxxxxxx>
- To: "Scuteri, Jeremy" <Jeremy.Scuteri@xxxxxxxxxx>
- Date: Fri, 17 Jun 2011 12:30:01 -0700
Jeremy, there are a number of regulators on the market particularly of
older design that are unstable with insufficient ESR and or capacitance
outside a certain range. Newer designs are much more tolerant of the
bypass network but transient response still benefits from engineered
bypass networks.
Steve.
On 6/17/2011 12:15 PM, Scuteri, Jeremy wrote:
> Has anyone encountered issues with resonances created from the interaction of
> the regulator and Bypass caps? When modeling the PDS (Power Distribution
> System) I notice that I can get some really nasty resonances when including
> the regulator in my model. I don't know if this is something that I should
> be concerned with or if I am modeling the output impedance of the regulator
> properly. Any thoughts on this?
>
> Thanks,
> Jeremy Scuteri
>
>
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--
Steve Weir
IPBLOX, LLC
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