LM5176-Q1: PCB layout review for two parallel configuration

Hi Jeffrey,

Thank you for reaching out with your question and for considering the LM5176 in you design.

Looking at the layout file I only see two layers. Are you just looking at placement of the power train components right now? If the other layers have been routed please send those as well.

For your reference this series of blogs will help to layout the LM5176 even though they are written for the LM5175 the layout strategy  is very similar. 

https://e2e.ti.com/blogs_/b/powerhouse/archive/2017/02/20/four-switch-buck-boost-layout-tip-no-1-identifying-the-critical-parts-for-layout

Please let me know if you have any questions.

Thanks,

Garrett 

Hi Garrett,

Yes, I want to know whether the placement of the power train components is correct or not. Please check that. After that, I'll request the layout design review.

Regards, Jeffrey

Hello Jeffrey,

Please excuse the late response.

For a dual phase layout, I would recommend to rotate the power path of the second phase the way that you can use the same GND plane for both phases. In addition I think it is very helpful to review the layout on the EVM for a good power path design.

Hi Brigitte,

Thanks for your response. I'll refer to the your recommendation. Also, I'll try to tune the phase and gain margin of this dual phase layout board next week. Could you help me on tuning the phase and gain margin through changing the resistor and capacitor of COMP pin? I need your help.

Regards, Jeffrey

Hi Garrett,

Thanks for your support. It will be help me understand the loop compensation of LM5176. Let me check it.

Regards,