TPS53355: TPS53355 related issues

Hello,

I was able to take a look at the schematic. I did not notice any major concerns, overall looks ok.

I briefly filled out the excel design calculator that resembles the schematic. Please go over this to make sure the design is inputted accurately, and make changes if necessary. I noticed a 'warning' regarding the RCC ripple injection circuit VFB ripple voltage value. This could be related to the Vout drop you are seeing.
Can you also probe SW node and inductor current along with Vout on the scope. Please label them along with your test conditions.

tps53355 design.xlsx

The User's Guide Schematic is also a good reference. Please refer to this to ensure your schematic does not have any major differences.

User Guide: https://www.ti.com/lit/ug/sluu522a/sluu522a.pdf?ts=1722019623161&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252FTPS53355%253Futm_source%253Dgoogle%2526utm_medium%253Dcpc%2526utm_campaign%253Dapp-null-null-GPN_EN-cpc-pf-google-wwe%2526utm_content%253DTPS53355%2526ds_k%253DTPS53355%2526DCM%253Dyes%2526gad_source%253D1%2526gclid%253DEAIaIQobChMI_sSl45zFhwMV4Uf_AR3XpBAcEAAYASAAEgIMcPD_BwE%2526gclsrc%253Daw.ds

Please let me know if this works

Thank you,

Calan