might have what you want in single package form. I have seen some but 5A seems high, im sure it will get expensive, which makes us ask why not just add in some mosfets after using a package that gives you the diver options.http://www.ti.com/lit/ds/symlink/drv8811.pdf
is this a unipolar or bipolar stepper?
anyhow, after using a STEPPER MOTOR CONTROLLER IC,
you can expect usually do things like set 1 pin to fwd/ rev.
1pin to en/disable, and then the rest is optional. Good ones (IMHO) will have micro-stepping, and homing logic.
I like to use opto-couplers to isolate high current devices from sensitive low power devices.