I built the following circuit to charge a large capacitor from a low power source before switching the load:
The MAX9064 has an internal REF of 0.2V and the resistor network should be triggering it on at 1.5V and off at 1.1V.
I think I may have messed up with the MOSFETs, as they are both Power MOSFETs? In any case, the circuit doesn't work properly. I get 0.5V at Vout with C1 removed. With C1 in place it charges way too slowly, but I'm still seeing a slowing rising mV value at Vout instead of 0V like it should be.
I'm thinking that either 1) I've used the Power MOSFETs incorrectly or 2) There just isn't enough current for it to function (but these are all super low current devices so it should?)
If it is the Power MOSFETs, is there a way I can make them work in this circuit or do I need to get different ones?
Note: I'm using the MAX9064 which has push-pull output. At 1.8V it is supposed to supply Vcc - 0.15 to 0.23. So it's output at the switch on voltage should be around 1.3V. M1 only requires a drive of 0.9V which it should be supplying.