Tool/software:
Hi everyone, I'm having an issue with a custom designed board involving the TPS25750. This is a sink-only configuration in which the TPS25750 operates in dead battery mode.
The following is the schematic of the relevant section of the board:
This is based off an FAQ on the forums: How do I create a Sink-Only USB-C PD port to replace a legacy Barrel Jack Connector?
On the board, after attaching a USB-C cable and verifying that 5V is present on the VBUS net and consequentially the VBUS_IN pin, I attempted to verify correct voltages present on LDO_3V3 and LDO_1V1. Unfortunately, both measure at 0V. It's more concerning that LDO_3V3 is not present as in dead battery mode the 3V3 LDO should be drawing from VBUS_IN to provide a 3V3 bus voltage, according to the power path diagrams in the datasheet.
Could anyone provide further guidance as to the appropriate next steps I should take to debug this issue or any issues spotted with my design? Thanks so much!
