AN 910: Intel Agilex® 7 Power Distribution Network Design Guidelines

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ID 683393
Date 12/04/2023
Public
Document Table of Contents
Document Table of Contents x
1. Intel Agilex® 7 Power Distribution Network Design Guidelines Overview 2. Power Delivery Overview 3. Board Power Delivery Network Recommendations 4. Board LC Recommended Filters for Noise Reduction in Combined Power Delivery Rails 5. PCB PDN Design Guideline for Unused Tiles 6. PCB Voltage Regulator Recommendation for PCB Power Rails 7. Board Power Delivery Network Simulations 8. Intel Agilex® 7 Device Family PDN Design Summary 9. Document Revision History for AN 910: Intel Agilex® 7 Power Distribution Network Design Guidelines
1. Intel Agilex® 7 Power Distribution Network Design Guidelines Overview x
1.1. Device Guidelines Status for Intel Agilex® 7 Devices
2. Power Delivery Overview x
2.1. Power Architecture 2.2. Rail Merger Requirements 2.3. Power Rails Specification 2.4. Decoupling Capacitors Recommendation
2.1. Power Architecture x
2.1.1. Power Budget 2.1.2. Power Tree
2.1.2. Power Tree x
2.1.2.1. Recommended Power Tree for the Intel Agilex® 7 Devices with only P-Tile and E-Tile in the Device Packages 2.1.2.2. Recommended Power Tree for the Intel Agilex® 7 AGI or AGF (with only F-Tile, or both F-Tile and R-Tile) Device Packages 2.1.2.3. Recommended Power Tree for the Intel Agilex® 7 AGM (with only F-Tile, or both F-Tile and R-Tile) Device Packages
2.3. Power Rails Specification x
2.3.1. Power Nets 2.3.2. Power Rails Tolerance 2.3.3. Power Nets and Transient Specifications
2.3.1. Power Nets x
2.3.1.1. Intel Agilex® 7 Package Power Nets and Subsystems Details
2.4. Decoupling Capacitors Recommendation x
2.4.1. Intel Agilex® 7 FPGA Packages Board-Level Decoupling Capacitors Summary 2.4.2. Intel Agilex® 7 E-Tile Board-Level Decoupling Capacitors Summary 2.4.3. Intel Agilex® 7 P-Tile Board-Level Decoupling Capacitors Summary 2.4.4. Intel Agilex® 7 F-Tile Board-Level Decoupling Capacitors Summary 2.4.5. Intel Agilex® 7 R-Tile Board-Level Decoupling Capacitors Summary
3. Board Power Delivery Network Recommendations x
3.1. Board Decoupling Capacitors and Power Flooding Guides 3.2. FPGA Core Fabric VCC Voltage Regulator Selection 3.3. Remote Sense Connections 3.4. Load Line Requirements 3.5. VCC Core Board Current Slew Rate
4. Board LC Recommended Filters for Noise Reduction in Combined Power Delivery Rails x
Choosing the LC Filter based on the DCR Value VCCBAT RC Circuit Using the Device Security AES BBRAM Key P1V8_GR2 ( Intel Agilex® 7 F-Series and I-Series)/P1V8_GR3 ( Intel Agilex® 7 M-Series) Filters Recommendation for Device Fabric P1V2_GR3 Filters Recommendation for Device Fabric P0V8_GR1 Filters Recommendation for Device Fabric VCCL Filters Recommendation for Device Fabric 4.1. P-Tile Rail LC Filter Board Scheme and Connection 4.2. E-Tile Rail LC Filter Board Scheme and Connection 4.3. F-Tile Rail Board Connection and LC Filter Recommendation under Noisy Voltage Regulator 4.4. R-Tile Rail Board Connection and LC Filter Recommendation under Noisy Voltage Regulator
5. PCB PDN Design Guideline for Unused Tiles x
5.1. PDN Design Guideline for Unused E-Tile 5.2. PDN Design Guideline for Unused P-Tile 5.3. PDN Design Guideline for Unused R-Tile 5.4. PDN Design Guideline for Unused F-Tile
1. Intel Agilex® 7 Power Distribution Network Design Guidelines Overview
2. Power Delivery Overview
3. Board Power Delivery Network Recommendations
4. Board LC Recommended Filters for Noise Reduction in Combined Power Delivery Rails
5. PCB PDN Design Guideline for Unused Tiles
6. PCB Voltage Regulator Recommendation for PCB Power Rails
7. Board Power Delivery Network Simulations
8. Intel Agilex® 7 Device Family PDN Design Summary
9. Document Revision History for AN 910: Intel Agilex® 7 Power Distribution Network Design Guidelines

4. Board LC Recommended Filters for Noise Reduction in Combined Power Delivery Rails

The part numbers of ferrite bead (FB) and inductances (L) selected in this chapter are the parts which are recommended by Intel® . However, you can select different part numbers as long as the inductance/impedance at certain frequency, resistance, and other parameters of the new parts are similar to recommended FB/L part (similar inductance/impedance and similar to lower resistance within frequency range mentioned in the data sheet of recommended part).

CAUTION:
Any sense line used on board must be placed before LC filter. If the sense line is placed after the LC filter, this results in a serious oscillation to the rails and unstable voltage that is an input to the voltage regulator feedback pin function.
Note: If the power rail is using LDO, you do not need to use the LC filter.

If you are using the recommended switching voltage regulator (LTC7151S), with a proper design from ADI, and meet the simulated 5 mV ripple specification, you do not need to use the LC filter for VCCERT_FGT_GXF, VCCERT1_FHT_GXF, and VCCRT_GXR rails.

Table 18.  Recommended Inductors and Ferrite Beads for the LC Filter
Part MPN L (nH) DCR (mΩ)
SL1616A-R10MHF 100 0.32
SL1616A-R05MHF 50 0.32
BLM18SN220TZ1 — 4
BLM18KG260TN1 — 7

The inductors or ferrite beads listed in the table above have been validated on the Intel® development kits and should be used as a reference only. You can choose other inductors or ferrite beads according to specific applications, as long as the specifications stated above are met and the LC filter works well. Intel® recommends you to run the simulation to ensure there is no further changes.

Table 19.  Recommended Capacitors Used for the LC Filter
Part MPN Size (mm/inch) Temperature Character Capacitor Value Capacitor Tolerance Rated Voltage
GRM21BC80G107ME15 2012M/0805 X6S 100 µF ± 20% 4 V
GRM21BC80G476ME15 2012M/0805 X6S 47 µF ± 20% 4 V
GRM21BC81C226ME44 2012M/0805 X6S 22 µF ± 20% 16 V
GRM188C80G476ME01 1608M/0603 X6S 47 µF ± 20% 4 V

The capacitors listed in the table above have been validated on the Intel® development kits and should be used as a reference only. You can choose other capacitors according to specific applications, package size used, temperature range, form factor, and rated voltage, as long as the specifications stated above are met and the LC filter works well. Intel® recommends you to run the simulation to ensure there is no further changes.

Choosing the LC Filter based on the DCR Value

DC drop specification must be around 0.5% of the voltage supply. If the voltage rail is 0.9 V, current is 1 A, BLM18SN220TZ1 DCR is 4 mΩ, DC drop = current x DCR = 1 A x 4 mΩ = 4 mV. The 0.5% specification of 0.9 V is 4.5 mV, which is within the specification. For a higher current value, SL1616 is the most suitable as it has lowest DCR.

VCCBAT RC Circuit Using the Device Security AES BBRAM Key

The connection shown below is recommended for the VCCBAT. Connect this pin to a non-volatile battery power source in the range of 1.0V to 1.8V. A series RC (R=10KΩ, C=1µF) circuit must be added to the VCCBAT rail.

Figure 8. VCCBAT Rail RC Circuit Recommendation

P1V8_GR2 ( Intel Agilex® 7 F-Series and I-Series)/P1V8_GR3 ( Intel Agilex® 7 M-Series) Filters Recommendation for Device Fabric

The connections below are recommended for the P1V8_GR2_FLTR voltage rails for the Intel Agilex® 7 F-series and I-series devices or the P1V8_GR3_FLTR voltage rails for the Intel Agilex® 7 M-series devices for noise filtering. The P1V8_GR2_FLTR for the Intel Agilex® 7 F-series and I-series devices or the P1V8_GR3_FLTR for the Intel Agilex® 7 M-series devices consists of VCCADC, VCCPLL_SDM, and VCCPLL_HPS.

Figure 9. VCCADC, VCCPLL_SDM, and VCCPLL_HPS Filter Recommendation
Figure 10. VCCPLL_NOC LC Filter Recommendation

P1V2_GR3 Filters Recommendation for Device Fabric

The following figure shows the filter recommendation for VCCA_PLL in 1.2V VCCIO power rail.

Figure 11. VCCA_PLL Filter Recommendation
Figure 12. VCCA_PLL LC Filter Recommendation (Low Power Scenario)

P0V8_GR1 Filters Recommendation for Device Fabric

The following figure shows the filter recommendation for the VCCPLLDIG_SDM, VCCPLL_NOC, and VCCPLLDIG_NOC in P0V8_GR1 power rail.

Figure 13. VCCPLLDIG_SDM Filter Recommendation
Figure 14. VCCLPLL_NOC LC Filter Recommendation
Figure 15. VCCPLLDIG_NOC LC Filter Recommendation

VCCL Filters Recommendation for Device Fabric

The following figure shows the filter recommendation for the VCCPLLDIG_HPS in VCCL power rail.

Figure 16. VCCPLLDIG_HPS Filter Recommendation

Section Content
P-Tile Rail LC Filter Board Scheme and Connection
E-Tile Rail LC Filter Board Scheme and Connection
F-Tile Rail Board Connection and LC Filter Recommendation under Noisy Voltage Regulator
R-Tile Rail Board Connection and LC Filter Recommendation under Noisy Voltage Regulator

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