CHIPFPGA.com: FPGA Board-Level Power and MLCC Sourcing Support
CHIPFPGA.com is part of the HK LIANYIXIN INDUSTRIAL website network, specializing in FPGA development boards, programmable logic devices, and related component information. As FPGA and AI accelerator designs demand increasingly sophisticated power delivery networks, the role of MLCC capacitors in these systems has never been more critical.
Why MLCCs Matter for FPGA Power Design
Modern FPGAs — from Xilinx (AMD) Versal and Kintex families to Intel (Altera) Agilex and Stratix devices — require multiple power rails with tightly regulated voltages. Each rail needs a network of decoupling capacitors to maintain power integrity:
Core Voltage (VCCINT): Typically 0.72 V to 0.95 V at tens of amperes. Requires bulk capacitance (47 µF to 100 µF) plus mid-frequency decoupling (1 µF to 10 µF X7R/X5R MLCCs).
I/O Banks (VCCO): 1.2 V to 3.3 V. Each bank needs local decoupling with 0.1 µF to 1 µF MLCCs per pin or per group.
Transceiver Power (MGTAVCC, MGTAVTT): Ultra-low-noise rails for high-speed SerDes. C0G/NP0 MLCCs are preferred for noise-sensitive analog supplies.
DDR Memory Interface (VTT, VREF): Requires precise voltage regulation with low-ESR MLCC decoupling.
Board-Level Decoupling Strategy
A typical FPGA board layout places MLCCs in a hierarchical decoupling network:
Bulk capacitors (100 µF to 470 µF) near the voltage regulator output.
Mid-frequency MLCCs (1 µF to 10 µF, 0805 to 1206) in the power distribution plane.
High-frequency MLCCs (0.01 µF to 0.1 µF, 0201 to 0402) placed as close as possible to FPGA power pins — often on the bottom side of the PCB directly under the BGA package.
For AI accelerator cards and data center FPGA boards that draw 100 A or more, the decoupling network must account for DC bias capacitance loss. A 22 µF, 6.3 V, X5R, 0805 MLCC may retain only 6–8 µF at 3.3 V bias — a critical consideration that designers must verify.
How AIMLCC Supports FPGA Projects
AIMLCC.com provides MLCC sourcing support for FPGA board designers and data center engineers:
High-capacitance MLCC: 10 µF, 22 µF, 47 µF, and 100 µF in 0805, 1206, and 1210 packages for bulk decoupling.
Low-ESR MLCC: For high-frequency decoupling close to FPGA power pins.
