What is the function of the voltage regulator in the button circuit?
Royce Posted on March 5, 2021
This is not called a voltage regulator tube, this is a TVS tube. It is an ESD device and is used to protect this pin. When your hand touches the button, it may release static electricity and damage the pin of the chip.
Cannon Posted on March 5, 2021
The esd protection of the interface.
Milly Posted on March 5, 2021
This is ESD, usually used at the interface to prevent static electricity.