3.1 Power Regulation and Consumption
The PolarFire FPGA requires core current (VDD) and transceiver current (VDDA) at 1V0. Other Voltage rails VDD25 and VDDA25 at 2V5, and VDD18 at 1V8 are shown in the following figure. The VDD depends on the size of the design programmed on the FPGA.
For a typical SFP+ application, the core current lies between 1A to 2A. It is highly recommended to check the power consumption using Microchip Power Estimator for different rails before finalizing the power numbers because it may vary with the design.
The following table lists the recommended decoupling capacitors to be used for the PolarFire device.
| Pin Name | Ceramic Capacitors | |||||
|---|---|---|---|---|---|---|
| 4.7 µF | 0.01 µF | 0.1 µF | 4.7 µF | 10 µF | 47 µF | |
| VDD | — | 2 | 2 | — | — | 2 |
| VDDA | 3 | 1 | 5 | — | 1 | — |
| VDD18 | — | — | 2 | — | 1 | 1 |
| VDD25 | — | — | 5 | — | 1 | — |
| VDDA25 | — | — | 4 | — | 1 | — |
| VDDI3 | — | — | 2 | — | — | — |
| VDDI4 | — | — | 2 | — | 1 | — |
| VDD_XCVR_CLK | — | — | 2 | — | — | — |
| VDDAUX4 | — | — | 2 | 1 | — | — |