We have received this inquiry from our customer,
I have designed the LMR14203X into a prototype board and it's shutting down above 60C ambient. It will restart once cooled to 22C, so I'm probably tripping its internal shutdown. In reviewing the part selection, the output cap is not a low ESR electrolytic. Its actually 0.7 ohms esr much greater than the web-bench rec. While I await the correct part to try, do you think this is the source of my problem? Note that my load is 150mA, part designed for 18-28V DC IN, 15.5V DC Out. Also, my inductor may be too high (220uH versus 120uH). Output cap is 68uF.
Upon checking the PCB layout, I noticed that the components such as inductor, output capacitors and other major parts are not properly laid out. Can you please confirm if there are other causes of the issue?