Abstract: The rapid increase in computing power of AI chips is pushing their power supply networks to their limits. Core voltage drops to 0.8-1.2V, and single-phase current surges reach the hundreds of amps, resulting in nanosecond-level (10-100ns) transient current gaps and MHz-level switching noise interference at the VRM output. Traditional capacitors, due to their high ESR and high high-frequency impedance, have become a bottleneck for system stability, while international high-end solutions pose supply chain risks. This article analyzes three core indicators of the power supply end and uses measured benchmark data from YMIN MPS series ultra-low ESR multilayer solid capacitors (conductive polymer chip aluminum electrolytic capacitors) as an example to provide engineers with a high-reliability replacement path that meets international performance standards and has a self-sufficient and controllable supply chain.
Introduction: The “Invisible Guardian” of the Power Supply End is Being Redefined
For AI servers pursuing ultimate computing power, power integrity (PI) is the cornerstone of stability. The nanosecond-level load surges of CPUs/GPUs are like “current storms.” If the VRM output capacitor cannot quickly replenish energy during the nanosecond-level idle window before the control loop responds (microseconds), it will directly cause core voltage sag, leading to calculation errors or frequency reduction. Simultaneously, if MHz switching noise is not absorbed, it will interfere with high-speed signals. Therefore, the output capacitor has been upgraded from “basic filtering” to a final energy storage buffer and noise discharge channel for “precise protection.”
Three Core Indicators: Why Traditional Solutions Fall Short?
Nanosecond-Level Transient Support: ESR is the Decisive Factor. Response speed depends on internal resistance; an ultra-low ESR of ≤3mΩ is a rigid threshold for meeting the rapid release of nanosecond-level charge.
MHz-Level Noise Suppression: High-Frequency Impedance Characteristics are Crucial. The capacitor must maintain extremely low impedance at the switching frequency and its harmonics to provide an effective path to ground for noise, ensuring the integrity of PCIe/DDR signals.
High Temperature and Long Lifespan: Matching the Harsh 7x24h Operating Conditions of Data Centers A 2000-hour lifespan at 105℃ and high ripple current capability (>10A) are fundamental to coping with long-term high-temperature stress and reducing operation and maintenance costs.
Solution Implementation: YMIN MPS Series – A High-Value Domestic Choice Benchmarked Against International Standards
The YMIN MPS series directly addresses the above pain points, with key parameters comparable to leading international brands (such as Panasonic GX series), demonstrating superior performance in real-world testing.
| Key Parameters(Example: 2.5V/470μF) | YMIN (MPS)MPS471MOED19003R | International Benchmark Model (GX)EEF-GXOE471R | Engineer Value |
| ESR (Max, 20℃/100kHz) | 3 mΩ (Typical Measured Value: 2.4 mΩ) | 3 mΩ | Ensure nanosecond – level fast response and stabilize voltage |
| Rated Ripple Current (45℃/100kHz) | 10.2 A_₍rms₎ | 10.2 A_₍rms₎ | Meet long – term high – load operation with lower temperature rise |
| Lifespan (105℃) | 2000 hours | 2000 hours | Ensure long – term reliability and reduce TCO |
| Operating Temperature Range | -55℃ ~ +105℃ | -55℃ ~ +105℃ | Adapt to harsh data center environments |
Brief Description: The capacitance/ESR curve is smooth across the entire temperature range. After 2000 hours of aging testing, parameter degradation is better than the industry average. Detailed test data can be found on the official website.
Q&A
Q: How to verify the nanosecond-level support capability of MPS capacitors in a specific project?
A: It is recommended to conduct actual tests on the target board: Use an electronic load to simulate the transient current step of the chip (e.g., 100A/100ns), and simultaneously monitor the core voltage drop using a high-frequency probe. Compare the voltage waveforms before and after replacing the MPS capacitor; the lower undershoot and faster recovery time provide direct evidence.
Conclusion: In the era of computing power, stability is equally important.
Driven by both computing power competition and supply chain self-sufficiency, every component in the power supply chain is crucial to system competitiveness. YMIN MPS series, with its internationally benchmarked performance test data, rapid response from the local supply chain, and cost advantages, provides a reliable domestic option for AI server power supply, contributing to the steady and long-term development of China’s AI infrastructure.
Summary at the End
Applicable Scenarios: VRM output terminals of AI servers/high-performance computing servers CPUs/GPUs.
Core Advantages: Nanosecond-level transient response (ESR≤3mΩ), high-efficiency MHz noise suppression, high-temperature long lifespan (105℃/2000h), high-value domestic alternative.
Recommended Model: YMIN MPS series ultra-low ESR multilayer solid capacitors (conductive polymer chip aluminum electrolytic capacitors) (e.g., MPS471MOED19003R).
【Testing and Data Declaration】
1. Data Source: Data source and testing declaration:
Data for the YMIN MPS series is derived from its official datasheet.
Data for the Panasonic GX series is cited from its publicly available datasheet. Key performance indicators (such as ESR and ripple current) have been verified by our laboratory using our own equipment on purchased samples (purchased through public channels) under identical testing conditions.
The performance comparisons in this article are based on the above sources and aim to provide an objective technical analysis.
2. Testing Purpose: All tests are conducted under identical conditions to provide engineers with an objective and referable comparison of technical performance.
3. Limitations: Test results are only valid for the submitted samples under specific testing conditions. Different batches and testing methods may lead to data discrepancies.
4. Trademarks and Intellectual Property: The terms “Panasonic,” “松下,” and “GX series” mentioned in this document are trademarks or product series names of their respective owners and are used solely to identify the benchmark products. The data comparison in this document does not constitute any endorsement or recognition of our products by Panasonic, nor is it intended to disparage them.
5. Open Verification: We welcome technical exchanges and verification based on equivalent standards and conditions.
Post time: Jan-09-2026