Hello,
I am trying to make a dual buck design for a project, but I am unable to get an output voltage from either of the two outputs. After reflowing the design, verifying solder joints on the TPS53126, the two SiZF920DT's and doing a check for shorts, I get no output voltage when I apply 8-12V. I see 5.06V on the two 4.7 uF and 1.0 uF caps for the internal 5V LDO, and I see 4.56V across the two boost caps. I also measured ~5 mV across the two trip resistors. However, I don't see any switching going on, and I think I would see that on the boost cap to ground.
The schematic is here, and the top layer for reference is here.
Thanks in advance.