For POWERSTEP01 is it possible to tell what the maximum speed of my stepper motor in VOLTAGE mode could be.

I am using a POWERSTEP01 at 48V in VOLTAGE MODE.

Here are the motor parameters. Also does this calculator assume a 0.9 degree stepper motor?

Is there an inherent speed limit (microsteps/sec) for VOLTAGE MODE?

Why is CURRENT MODE capable of higher speeds, don't they both

run out of voltage at high speeds due to BEMF?