An Example Of Vr Emi Noise; Vr Noise Can Result In Both Si And Emi Issues; Simplified Voltage Regulator Module Circuit And Vrm Emi Noise - Intel Quark SoC X1000 Design Manual

Electromagnetic Interference—Intel
Figure 54.

An Example of VR EMI Noise

Figure 55.

VR Noise Can Result In Both SI and EMI Issues

Figure 56.

Simplified Voltage Regulator Module Circuit and VRM EMI Noise

It is also found that the EMI noise is correlated with the ringing at the phase node(Vx).
A way to mitigate the ringing amplitude is to slightly increase the gate resistance of Q1
and/or Q2. However, it should be aware that increasing gate resistance impacts power
efficiency of the VRM circuit.
June 2014
Order Number: 330258-002US
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Quark™ SoC X1000
VR
P latform noise
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Intel Quark™ SoC X1000
PDG
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