I'm designing a buck-boost which needs to provide 5A @ 3.6V, and work from an input varying from 2.8 - 5V.
After having a look at the different non-inverting topologies, it looks like the relatively conventional 2/4-Switch Buck-Boost is the way to go. I can't find any parts with integrated FETs at this load current, so it looks like it will be Controller + External Switches. My question is regarding Max Output Current. Is this independent of a controller with external Switches, Inductor etc?
This value is rarely specified in relation to Controllers, and yet things like Gate Drive Strength are specified sometimes, suggesting that there is a Max Output Current limitation related to the controller itself. Is this true?
And if so,
How do I go about determining the Max Output Power a controller can handle, based on it's drive strength or any other parameter?