Hello-
We have a problem where the TPS54625 occasionally won't start up in our existing circuit. We have a faster dV/dT on the input than previous designs, and we suspect the problem may involve too much output capacitance.
Since this is an existing design, we want to minimize our changes. Our design is 12V in, 5V out at 2A maximum. We have over 300uF of output capacitance on the TPS54625. Webench does not analyize phase margin for this device, so we need your help with that.
Is it possible to have your experts review our schematic? We do not want to post it on the forum, so please email me at timothy.starr@avnet.com and I will reply with .pdf attachment.
Thank you and Best Regards,
-Tim Starr on behalf of CS@SN
