Yeah, I found the demo board manual description. Since the COMP pin is simply the output of the error amplifier into the logic, what they're doing is pulling this down to ground to inhibit switching? The diodes seem to be for raising the voltage just a little bit above ground and not for any rectification. Thus, a logic level FET would be enough for my purposes. Can anyone confirm my thinking?
Also, in the same application circuit in the data sheet, what is the purpose of the resistor R13 which goes from the feedback pin to the current sense resistor. Is that necessary?