Issue with Controlling a DC/DC Boost Converter

Thread Starter


Joined Jan 18, 2015
I have a simple circuit that uses a DC/DC boost IC to raise the voltage from a single AA battery to run a processor and small transmitter. The problem is that, at times, I want to turn off the DC/DC boost (while the transmitter is disabled) so that I can sample the battery voltage.

The Boost IC (the NCP1402) has a pin that enables or disables itself. I would like the processor to be able to take that pin low in order to disable the NCP1402. I don’t think I can use the processor directly to do this, I’m guessing I need a transistor in there. Can anyone suggest how I would do this?