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Forum Post: Webench DC/DC inverting and filtering question

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Hi

I have a project where i need a +5 and a -5 volt rail. I used the Webench power architect to help me to design my 2 power rail since i don't have much experience with switching converter.

For the Negative rail, the Webench created a inverting buck boost, i understand that the ground become the negative rail but i don't understand why the ripple filter is connected like in the picture. If the ground become the negative rail L_filter_1 should be on the negative rail and not in series with L1. The ripple filter seem useless to me in this configuration  and the _Gnd_2_1 and _Vout_1 are not at the right place, it is a bug??

Thanks !


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