[SI-LIST] Re: Power Integrity about Vtt of DDR

> For  Vdd decoupling you will need to compute the worst case
> instantaneous  current required by your devices and the acceptable
> noise level,  (usually 5%) and from that compute the necessary ESL to
> accomplish  this.

Just to be a nit-picker...

Assuming that the manufacturer allows 5% tolerance on the supply voltage, 
using all of that 5% for noise only works if your regulation is exactly on 
target.

How do people normally divide up that budget?


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