Arduino running under 5mA

My first post here!

I'm developing a circuit that needs to run under 5mA.
I have a 7V 5mA power supply and i need to run a PWM and an analog reader, i wanna use the ATTINY85 and the LP2980IM5-ADJ LDO to regulate it to 1.8V.

My question is:
What would be the power on it? Will it run?


I think it depends on what your driving with the PWM output.

Look at sections 22.1 and 22.3 of the datasheet. The chip itself uses about 300uA at 1.8V and 1MHz and the A/D converter module adds 15uA.

Thanks, i'm driving just logical ports, almost no power consumption.
I'm worried about current peaks...