Voltage Detector - Max Current?

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k1ng 1337

Joined Sep 11, 2020
940
Hi I am using an MCP112 "precision voltage detector" as over discharge protection on a battery pack, my setup is as follows:

Battery is connected to MCP112; when voltage is above 4.4, the output pin is driven high which enables a MOSFET to supply power to breadboard rails allowing as many as desired loads. The circuit has been running for 2 days without apparent issues..

My question is: MCP112 datasheet specifies an input current (Vdd) of 10mA (absolute max rating), as well as an operating current (Idd) of 1.75uA max (listed under electrical characteristics)

Do the internal components disallow input current above 1.75uA? If so why am I given a max rating of 10mA?

What is the difference between Vdd and Idd as they relate to the datasheet?

Must I regulate the input current? If so how do I without affecting voltage because after all this is a precision voltage detector IC.

I have included the MCP112 datasheet, thanks!

Screenshot_20200911-102822.png
 

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Chris65536

Joined Nov 11, 2019
270
Must I regulate the input current?
No, you just need to assure the load on the output won't draw more than 10mA. The MOSFET gate draws almost zero after it's charged. Maybe a resistor in series with the output would limit the very short current pulse? I'm not sure if that's necessary.
 
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