TPS82130: The output voltage of TPS82130 can only reach 4.7V

When I put the input voltage from 12V to 9V, the output voltage suddenly dropped to 1V

Hello, we have received your case and the investigation will take some time. Thank you for your patience.

There's WEBENCH^® Designer TPS82130 in TPS82130‘s page, you can refer that to design:

TPS82130 data sheet, product information and support | TI.com

But the question is design is based on the webench results

PG pin 's 100k is connected to VOUT in your webench results

Yeah I'v noticed the issue and after I removed the pull-up res R10, nothing changed the problem remained

Can you provide the latest schematic？

sure. And I find that when I increase the resistance of R16, for excample from 590k to 620k, the output voltage remains the same and the fb pin voltage gets lower.

Hi, Eirwen. Any updates?

According the latest schematic, is the PG pin floating now?

PG pin 's 100k is connected to VOUT in your webench results