DRV8805: Roadmap for unipolar & microstep stepping motor

Part Number:DRV8805

If there match the below motor driver solution or roadmap, please let me know.

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・Stepping motor driver

・Unipolar drive

・VM:30V~

・Peak current: 1.5A~

・RMS Current: TBD

・Interface: Clock-in(Direction, PWM or PH/EN are also OK)

・Microstepping(No of step is TBD)

・Competitor: TB67S179(Toshiba)

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DRV8805 is nearest, but this is not have microstep.

I think that possibility are any roadmap or unipolar solution from use bipolar IC(DRV8811, etc).

Best regards,

Satoshi