Yes, the configuration supplied by a single regulator is fine.
However, if a PLL is used, a filter must be inserted in the VCCA.
(Reference) For more information, please refer to the MAX 10 Power Management User Guide
2.1.3. Comparison of the Intel MAX 10 Power Supply Device Options • MAX 10 Power Management User Guide • Altera Documentation and Resources Center
(Comparison of the Intel MAX 10 Power Supply Device Options) ~ excerpt ~
single-supply devices, only one power supply is required—3.0 V or 3.3 V to power the core of the FPGA. The same power supply can be used to power the I/O if the same 3.0 V or 3.3 V voltage is required. If different I/O voltage is used, then additional voltage regulators will be needed.
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Category: Power Supplies
Tools: -
Devices: MAX® 10