To put it simply, my Arduino nano 33 iot is drawing one amp off of USB and the voltage converter (MPM3610) gets very hot to the touch. The code does not run. I want to know why this is happening and how to prevent it in the future.
I was working on some rocketry projects on a prototype pcb board. I use a buck converter that uses a lipo to power servos and an arduino (through the USB port). The buck converter is "DROK 5A USB Voltage Regulator." The servos were powered off of the 5v output to provide enough operating current. There is a barometer, an LED, and a piezo buzzer on the board that are powered off of the 5v output on the arduino. The arduino 5v supply and the buck converter 5v supply are all grounded together. There have been no issues with this setup until recently.
Seemingly randomly, running off of the lipo power supply, the arduino started to get very hot and the code did not run as expected. After feeling around, the voltage supply chip (MPM3610) was the cause of the heat (right next to the gyroscope). The arduino now pulls 1 amp off of a USB port. I don't know what happened, so why did this happen? What can cause a the voltage regulator to fail?
Let me know if there's any more information you guys need to answer this question, I'll be happy to provide information and pictures.
Thank you in advance for your help!