LM25118EVAL: to design similar board with 2 layers

Hello Yaita-san,

That is theoretically possible but following should be taken in consideration:

1. thermal performance will be affected. using two layers only greatly impacts thermal performance as there is not sufficient amount of copper to dissipate heat and device operating temperature will increase.
2. device operating ta higher temperatures may experience reliability issues significantly than device operating ta lower temperature
3. EMi performance will be affected. Ground layer placed directly underneath top/signal layer has positive effect on resulting EMI performance, So using two layer board may require much more complex and sophisticated filter to achieve comparable performance to two layer board.

I hope this helps.

Regards

Brani