Hi.
I am developing a circuit using a DS3231 real time clock.
The RTC has an alarm output that can pull a voltage low when the alarm is active (open-drain output).
I need the "alarm" signal to instead apply a voltage (VBAT) to the enable pin of the TPS6109 boost convert IC.
The purpose of this circuit is to wake up every few minutes based on alarm output, do some processing, reset alarm, turn it's self back off.
I have included an image of the relevant part of the schematic and added three questionmarks where I am unsure what component to use.
Would using a PNP transistor be a good way to flip the logic?
Would it be a big constant drain on the battery?
Thank you.