Shenzhen Mingjiada Electronics Co., Ltd. currently has brand-new, genuine MP2891GQN units in stock. At the same time, we offer long-term, high-price buyback services for inventory of this model and the entire MPS series of multi-phase controllers from manufacturers, distributors, and traders, providing a two-way distribution channel of “supply + buyback” for the entire industry chain.
MP2891 Product Overview
The MP2891 is a dual-rail, digital, multi-phase controller specifically designed to provide core power for NVIDIA PWMVID. When used in conjunction with MPS Intelli-Phase™ products, it enables the construction of a complete multi-phase voltage regulator (VR) solution with minimal external components. Rail 1 can be configured to operate with up to 16 phases, and Rail 2 with up to 8 phases, providing flexible phase allocation for loads with different current requirements, such as the GPU core and video memory.
The device features on-chip non-volatile memory (NVM) for storing and restoring configuration data and fault parameters, simplifying system debugging and mass production deployment. Combined with automatic loop compensation, coupled inductor mode, and automatic phase switching (APS) capabilities, designers can balance efficiency, transient response, and the number of external components.
At the interface level, the MP2891’s PWM-VID interface is compatible with the NVIDIA Open VReg specification (OVR4i+) and supports both AVSBus Rev. 1.3 and PMBus/I²C (with bus speeds up to 1 MHz), enabling seamless integration with the core power supply protocols of NVIDIA platforms.
MP2891 Specifications
Manufacturer: Monolithic Power Systems (MPS)
Device Type: Dual-output digital multiphase controller with PWM-VID interface
Number of Power Rails: 2
Maximum Phases: Rail 1: 16 phases; Rail 2: 8 phases
Supply Voltage (VCC): 3.1 V – 3.5 V
Typical Quiescent Current: 50 mA
Typical Shutdown Current: 0.25 mA
Switching Frequency (fSW): 200 kHz – 3 MHz
Core Interfaces: PWM-VID (OVR4i+ compatible); AVSBus Rev. 1.3; PMBus/I²C (1 MHz)
Configuration Storage: On-chip NVM
Processor Platforms: ASIC, CPU/GPU, OpenVReg
Package: QFN-56 (7 mm × 7 mm)
MP2891 Key Features
Flexible 16-phase + 8-phase allocation to accommodate differentiated power delivery for the GPU core and video memory
The MP2891 clearly distinguishes the phase resources between the two power rails: Rail 1 is designed for high-current, high-transient loads such as the GPU core and can be scaled up to 16 phases; Rail 2 is designed for video memory or other auxiliary power rails and supports up to 8 phases. This dual-rail asymmetric architecture enables a single controller to simultaneously serve two loads with significantly different voltage and current requirements, reducing the number of controllers and layout complexity on the GPU power delivery board.
PWM-VID + AVSBus + PMBus/I²C Multi-Protocol Compatibility
The MP2891’s PWM-VID interface directly aligns with NVIDIA’s Open VReg specification (OVR4i+), which is key to achieving “native integration” with NVIDIA GPU power delivery platforms. At the same time, the device supports AVSBus Rev. 1.3 and PMBus/I²C, providing standardized digital channels for system-level voltage regulation, current feedback, and fault monitoring. For solutions requiring secondary development based on NVIDIA reference designs or domestic substitution, this combination of interfaces reduces the workload associated with protocol adaptation.
Digital Nonlinear Control and Automatic Loop Compensation
The MP2891 employs a unique digital multiphase nonlinear control architecture capable of rapidly responding to load transients with minimal output capacitance. Its core approach is to apply the same power loop control method to both steady-state and load transient conditions, rather than switching between the two modes. Consequently, power loop compensation configuration is simpler, reducing reliance on engineering debugging experience.
Comprehensive Monitoring and Protection System
The device integrates real-time monitoring of input voltage (VIN), output voltage (VOUT), current, and power. Protection features include VIN under-voltage lockout (UVLO), output over-voltage protection (OVP), under-voltage protection (UVP), over-current protection (OCP), and over-temperature protection (OTP), and supports three fault response modes: no action, latch, or hiccup. Fault types can be automatically logged to NVM, facilitating failure analysis and field diagnostics. The Intelli-Phase™ fault diagnosis feature further brings the health status of the power stage into the controller’s scope.
Automatic Phase Shutdown and Active Inter-Phase Current Balancing
The Automatic Phase Shutdown (APS) feature dynamically adjusts the number of active phases based on load current, shutting down redundant phases during light loads to improve overall efficiency. Active inter-phase current balancing supports configurable offsets, allowing thermal distribution across phases to be specifically balanced according to layout and thermal conditions, rather than simply pursuing current sharing.
Application Scenarios
NVIDIA GPU Core and Video Memory Power Supply
The MP2891 has been deployed in the NVIDIA GeForce RTX 4080 Founders Edition for combined PWM control of NVVDD (GPU core) and FBVDDQ (video memory), and is one of the mass-production-proven controllers currently used in NVIDIA graphics card power supply solutions. For graphics card repair, solution validation, or supporting production scenarios, the availability of the MP2891 directly impacts the debugging and repair cycles of power supply boards.
AI Servers, High-Performance Computing, and VR Design
In AI server applications, the MP2891 can be paired with MPS Intelli-Module™ high-current modules (such as the MPC22167-130) to achieve system-level power delivery capabilities of up to 2000A. As the power consumption of GPUs and ASIC accelerator cards continues to rise, the scalability of multi-phase controllers and the flexibility of thermal management have become core variables in power supply architecture design. The MP2891’s 16-phase Rail 1 capability offers strong adaptability to this trend.
ASIC / CPU / OpenVReg Platforms
In addition to NVIDIA GPUs, MPS officially lists the MP2891’s processor platforms as ASIC, CPU/GPU, and OpenVReg, indicating that its application is not limited to a single GPU brand but is intended for a broader range of processor core power supply scenarios.
Mingjiada Supply and Demand Information
Spot Availability
Mingjiada Electronics currently has brand-new, factory-sealed MP2891GQN units in stock, packaged in QFN-56 (7mm × 7mm) form factor, with 2,000 pieces available. These units feature short lead times and traceable batch information. This model fully supports all core features of the MP2891: up to 16 phases on Rail 1 and up to 8 phases on Rail 2; PWM-VID compatible with OVR4i+; and support for AVSBus and PMBus/I²C interfaces. It is suitable for NVIDIA GPU core power delivery, AI server VR designs, as well as power solution validation and mass production for high-performance graphics cards. For customers requiring matching power stages, Mingjiada also supplies MPS Intelli-Phase™ DrMOS and Intelli-Module™ series modules to help shorten the BOM matching cycle.
High-Priced Buyback
In addition to its supply business, Mingjiada Electronics offers long-term, high-price cash buyback services for the MP2891 and the full range of MPS multi-phase controllers to factories, distributors, and traders. The buyback list explicitly includes the MP2891 (dual-loop digital 16-phase controller with PWM-VID interface) and also covers other models in the same series, such as the MP2882, MP2890, MP2953B, and MP2965. For companies holding MP2891 dead stock, project offcuts, or surplus materials from discontinued products, Mingjiada offers flexible and efficient disposal solutions: there are no restrictions on quantity or packaging format; brand-new, factory-sealed units, bulk items by reel, and engineering samples are all eligible for evaluation and purchase. We support rapid online quotes based on BOM lists and on-site inspections in the Pearl River Delta region, with cash payment upon verification. Recycled materials are reintroduced into the formal supply chain rather than flowing into informal dismantling channels.
Established in 1996, Mingjiada Electronics holds ISO 9001 Quality Management System certification, with warehouses and sales outlets in Hong Kong, Shenzhen, Guangzhou, and other locations. We maintain a inventory of 2 million SKUs and offer comprehensive procurement and supply services for MPS power management chips, covering the full range of products including multi-phase controllers, Intelli-Phase™ DrMOS, Intelli-Module™ high-current modules, and synchronous buck converters. We provide one-stop support for the design, mass production, and inventory optimization of power supply solutions for NVIDIA platforms.
Supply Inquiries / Inventory List Submission
Shenzhen Mingjiada Electronics Co., Ltd.
Business Focus: MP2891 Spot Supply · High-Priced Purchases of MPS Multi-Phase Controllers · Disposal of Factory Obsolete Inventory
Mobile: +86 13410018555
Email: sales@hkmjd.com
Phone: 86755-83294757
To obtain real-time inventory and batch information for the MP2891 or to submit a recycling list, please contact the Mingjiada Electronics sales team directly.
Tags: MP2891GQN, MP2891GQ, MP2891G, MP2891
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