I am working on a small IoT device that requires stable power for sensors and a WiFi module. I tested different power modules, but I noticed voltage drops when the load increases suddenly.

I want to ask for guidance from experienced developers here:

1. What type of DC-DC converter is more suitable for small IoT devices?

   • Buck

   • Buck-Boost

   • LDO (for noise-sensitive sensors)

2. How do you calculate the proper output current rating?
   Should I consider peak current or continuous load?

3. Is it necessary to add extra capacitors at the output of the module? If yes, what values are recommended?

4. What are the best practices to avoid noise interference with microcontrollers?

If anyone has experience with power modules in IoT sensors, your suggestions would be very helpful.

Thanks in advance!