Other Parts Discussed in Thread: LM5155
We recently switched to the LM51551DSSR due to the unavailability of our previous boost IC.
I generated a design with the TI WeBench Power Designer, and verified the schematic with the typical application in the datasheet, and everything looked good to me. The 12V_BOOST_EN pin is connected to an MCU GPIO pin that is 3.3V when high.
What I've noticed is that the load voltage is the same as the input voltage, whether I have the 12V_BOOST_EN GPIO set to high or low. I've also tried wiring that pin directly to the BIAS pin, but with the same result.
Are there any obvious mistakes that stand out to you? I wanted to double check before doing a deep dive into the datasheet.