What is it?

This is a small breadboard sized power controller with two linear regulators on board, one of which powers the attiny10 and one to be used to power other devices. The attiny10 has been programmed with firmware that turns on the second linear regulator whenever the button is pressed as well as send a signal out of the int pin. The En pin stays high as long as the regulator is on. Whenever the button is held for 6 seconds, the Attiny10 turns off the regulator as well as the En pin. If the En pin is grounded the Attiny10 will also shut off the regulator.

This version outputs 3.3v or 5v or in a optional 6 pin format regulator for voltage out and can accept up to 16v. The linear regulator is limited to 300ma

Why did you make it?

I was developing another product and saw a limited number of affordable PMIC chips that are also push-button controllers that allow one to turn on a device by pressing a button and turn a device off by holding it down, as most computers do. I looked for many different discrete circuits to do the same thing but all ended up being fairly large. Another component is that it needed to be low power usage as I planned to run off a battery.

So I looked into cheap low power microcontrollers that could handle this task and found the Attiny10 in sleep mode used nanoamps. With this, the Attiny10 is "always" on but uses such a low amount of power, less than most batteries natural discharge. It has a wide input voltage range allowing it to be used from 5v to 1.8v without any major changes.

What makes it special?

As far as I know, this is the cheapest, smallest push button PMIC one can get, and its entirely open source. If you have the need for a particular voltage output let me know and I can make you a custom one.