I'll try to explain what I'm doing:
I was using a 556 as a flip flop for a single button push button start for my car.
The original design works but in the interest of having way fewer parts and because I'm a glutton for punishment, I found an EDE2208 which is a momentary-to-toggle IC. It seems like a perfect solution and even has switch debounce built in.
Only one issue, and it actually might not be an issue: Because this is in a car I need to keep my at rest parasitic current draw to a minimum.
I was planning on using a 5V + regulator powered all the time, but that's where my issue or concern is. Will a 5V voltage regulator draw an excessive amount of current if the 2208 is inactive or not powering/controlling a transistor?
While I'm on the subject, could anyone recommend a good all purpose 5V + regulator? I was thinking a 78L05 would work, but the spec sheet is listing it maximum quiescent current as 5mA, it would be great if I could get it down more.

I'm only going to be using 1 set of contacts, so I won't be over-working the regulator too much, right?
Thanks for the input,
Dan

 

A voltage regulator will always draw some power. It is, after all, a circuit. But if there is no load it should draw very little.

An LM317, a variable voltage regulator, draws around 10ma if there is no load.

 

I just need a fixed 5V to power the IC.

 

Yep, and whatever you use is going to draw something, be it a zener circuit or a 7805. The circuitry inside the 7805 needs some power just to maintain the voltage. I picked the LM317 because I knew its standby current, I'm not so sure about the 7805. I would guess a couple of ma.

 

The spec sheet lists quiescent current at 5mA.
I can live with it, but I wish I could find lower.
I was also thinking about powering my module through the battery saver section of my body module.
The body module shuts down the OEM power relay after about 14 minutes. I just need to see if the power relay stays active during cranking.

 

I wouldn't be too surprised to find out the new generation low voltage drop chips draw even less. I'm not sure, but I think they use CMOS circuitry.

 

BTW Bill, thank you for the input and allowing me to bounce ideas off you.

 

My pleasure.

 

Google "low quiescent current voltage regulator". You can get 5V regulators with quiescent current on the order of a few microamps.