MPQ8632-10 changed to Inner2

Hi, there are questions about layout

As SPEC shown in p.45 Figure 57 (Inner2 Layer), why the two nets are changed to Inner2 Layer?

That is, the nets connected to inductor are changed to Inner2 Layer.

Is that for reducing noise to other signals?

One is SW pin becuase is snesitive which needs short trace and away other signals

The other one is output voltage, ans this one I cannot figure ou why need to change to Inner2 Layer

Can I change the two nets to bottom for awaying other signals?

Hello,

Apologies for the delay.
Yes, SW node is noisy so it is best to keep the traces short and away from other signals, especially feedback which is sensitive to noise. The 4-layer layout is recommended for better thermal and overall performance.

Best Regards,
Yu