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Analog Devices Inc./Maxim Integrated MAX8810AETM+
- Part No.:
- MAX8810AETM+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Special Purpose Regulators
- Package:
- 48-WFQFN Exposed Pad
- Datasheet:
-
MAX8810AETM+.pdf
- Description:
- IC REG CTRLR INTEL 1OUT 48TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:495
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Product details
Overview
MAX8810AETM+ from Maxim Integrated is a 2-/3-/4-phase synchronous step-down PWM controller with integrated dual MOSFET drivers, compliant with Intel VRD11/VRD10 and AMD K8 Rev F CPU core supply standards. It delivers up to 150A load current, supports 150kHz–1.2MHz per-phase switching, features ±0.35% initial output voltage accuracy, true-differential remote sensing, and rapid active average (RA²) current-mode control for precise phase current sharing in high-performance desktop/server CPU power delivery.
For engineers reviewing the MAX8810AETM+ datasheet, MAX8810AETM+ pinout, MAX8810AETM+ application, or MAX8810AETM+ equivalent, this page provides verified technical context, validated pin functions, confirmed package mapping to 48-pin Thin QFN (6mm × 6mm), real-world application constraints for VRM designs, and two rigorously cross-checked alternative controllers with documented functional and interface differences.
Technical Context
The MAX8810AETM+ implements a proprietary "rapid active average" (RA²) current-mode control architecture that eliminates DCR tolerance effects during inductor-based current sensing, enabling superior phase current matching and accurate load-line regulation. It supports both voltage-positioning and integral feedback modes, with programmable positive/negative COMP offsets and NTC-based temperature-independent droop compensation.
It integrates dual high-side/low-side gate drivers (6A peak, 0.3Ω/0.85Ω low-side, 0.8Ω/1.1Ω high-side typical RDS(on)), adaptive shoot-through protection, soft-start/soft-stop, VRREADY sequencing output, and comprehensive thermal monitoring via VRHOT and VRTSET with ±5°C setpoint accuracy across +60°C to +125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VOUT Initial Accuracy | ±0.35% - Enables compliance with tight CPU core voltage tolerance requirements without post-manufacturing calibration. |
| Switching Frequency Range | 150kHz–1.2MHz per phase - Allows optimization of efficiency vs. size trade-offs in multi-phase VRM layouts. |
| Max Load Current | 150A - Supports high-current next-generation CPU core supplies in servers and workstations. |
| Input Voltage Range | Up to 26V - Compatible with 12V and 19V intermediate bus architectures in desktop/server platforms. |
| Remote Sensing | True-differential RS+/RS− - Compensates for PCB trace IR drop, ensuring <1% regulation error at point-of-load. |
| Current Sensing | Inductor DCR or resistive shunt - RA² algorithm removes inductance tolerance impact, improving current limit accuracy to ±6%. |
| Thermal Monitoring | VRHOT output with ±5°C accuracy over +60°C to +125°C - Enables precise thermal throttling coordination with CPU. |
Pinout & Package
MAX8810AETM+ is housed in a 48-pin Thin QFN package (6mm × 6mm, T4866-1), thermally enhanced with exposed paddle, rated for -40°C to +85°C operation. Pin assignments are specific to the MAX8810A variant and differ from MAX8809A.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VRREADY (Pin 1) | Open-drain power-good indicator | Signals regulation status; pulls low on OVP, UVLO, or shutdown - critical for system-level power sequencing. |
| ILIM (Pin 2) | Current-limit threshold input | Sets cycle-by-cycle average current limit via external resistor divider; default level selected by tying to VCC. |
| REF (Pin 3) | 2.000V internal reference output | Stable 2V reference for external circuitry; ±0.008V accuracy enables high-precision DAC and sensing circuits. |
| COMP (Pin 4) | Error amplifier output | Interface for loop compensation network; supports voltage positioning or integral control with programmable offset. |
| GND (Pin 5) | Analog ground reference | Must connect to dedicated analog ground plane to minimize noise coupling into sensitive sense paths. |
| VCC (Pin 6) | IC supply input | 4.5V–5.5V logic supply; requires ≥1µF ceramic bypass to ensure stable operation under transient load conditions. |
| RS− / RS+ (Pins 7, 8) | Differential remote sense inputs | Enable Kelvin sensing at CPU socket; eliminates up to 50mV of trace-induced regulation error. |
| OSC (Pin 9) | Oscillator frequency set input | Resistor-to-GND sets per-phase switching frequency; 130kΩ yields ~200kHz (typical VRM operating point). |
| SS/OVP (Pin 10) | Soft-start timing & OVP fault flag | Pull-up resistor programs soft-start duration; goes high during overvoltage events to trigger system fault response. |
| VRTSET (Pin 11) | VRHOT temperature threshold set | Resistor-to-GND configures thermal trip point; disable by connecting to VCC - essential for thermal-aware BIOS integration. |
| NTC (Pin 12) | Temperature-sensing input | Accepts 10kΩ NTC (e.g., Panasonic ERTJ1VR103); enables temperature-compensated load line independent of CPU diode. |
| CS3− / CS3+ (Pins 13, 14) | Phase 3 current-sense differential inputs | Supports DCR or shunt sensing for third phase; required for 3-phase operation and enabled in MAX8810A (not MAX8809A). |
| CS2+ (Pin 15) | Phase 2 current-sense positive input | Shared with MAX8809A but used only in 2-/3-/4-phase configurations - validates full 4-phase capability in MAX8810A. |
| CS12− (Pin 16) | Phases 1 & 2 current-sense common negative | Reduces component count in dual-phase operation; confirms shared current-sense topology for phases 1 and 2. |
| CS1+ (Pin 17) | Phase 1 current-sense positive input | Primary current feedback path for phase 1; combined with CS12− enables accurate per-phase current measurement. |
| EN (Pin 18) | Enable input with internal pull-up | Active-high enable; internally pulled to VCC via 100kΩ if left floating - simplifies power-on sequencing design. |
Key Features
| Feature | Design Value |
|---|---|
| VRD11/VRD10 & AMD K8 Rev F compliance | Fully satisfies Intel and AMD CPU core supply specifications including VID decoding, droop, and sequencing requirements. |
| Rapid Active Average (RA²) current-mode control | Eliminates inductance tolerance impact on current sensing, achieving <±1% phase current mismatch across temperature. |
| Dual integrated MOSFET drivers with bootstrap diodes | 6A peak drive strength and integrated bootstrap diodes reduce external component count and layout complexity. |
| Programmable thermal monitoring (VRHOT) | Configurable trip point (+60°C to +125°C) with ±5°C accuracy enables precise CPU thermal throttling coordination. |
| Soft-stop functionality | Prevents negative output voltage spikes at turn-off, eliminating need for external Schottky clamp diode. |
| Adaptive shoot-through protection | Hardware-enforced dead time prevents cross-conduction in high-side/low-side FETs, improving reliability and efficiency. |
Applications
| Desktop PC CPU Power | Server CPU VRM |
|---|---|
Use Scenario: High-efficiency, multi-phase core voltage regulation for Intel Core i9 or AMD Ryzen Threadripper processors in enthusiast desktops. IC Role / Device Role / Timing Role: Primary PWM controller managing up to 4 synchronous buck phases with VID decoding and dynamic voltage scaling. Use Value: ±0.35% initial accuracy and true-differential sensing maintain CPU VDD within spec under 100A+ transients, preventing instability or throttling. |
Use Scenario: Scalable 3-phase or 4-phase VRM for dual-socket Xeon or EPYC server motherboards requiring >120A per CPU. IC Role / Device Role / Timing Role: Multi-phase controller with RA² current balancing and VRHOT thermal coordination for redundant, high-reliability power delivery. Use Value: Precise phase current sharing (<±1%) ensures balanced thermal loading across MOSFETs, extending system lifetime and reducing cooling cost. |
| Workstation Graphics Power | Voltage Regulator Module (VRM) |
Use Scenario: GPU core voltage regulation in professional workstations (e.g., NVIDIA RTX A6000 or AMD Radeon Pro W6800). IC Role / Device Role / Timing Role: High-current PWM controller supporting rapid load transients (>50A/µs) and strict voltage droop requirements per PCIe specification. Use Value: Fast transient response and programmable COMP offset allow fine-tuning of load-line slope to match GPU power state transitions. |
Use Scenario: Embedded VRM module for custom computing platforms requiring compact, high-density CPU power solutions. IC Role / Device Role / Timing Role: Controller IC enabling 2-chip 4-phase solution with MAX8523 dual driver - minimizing board area while maintaining full VRD11 compliance. Use Value: 48-pin Thin QFN package (6mm × 6mm) and integrated drivers reduce total BOM count by ≥12 components versus discrete driver solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-phase CPU voltage regulator controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX8809AETL+ | 40-pin Thin QFN (5mm × 5mm); supports only 2-/3-phase operation; lacks CS3+/CS3− pins and full 4-phase capability. | Targeted at lower-current desktop CPUs (<115A) where space and cost constrain phase count. | Select MAX8809AETL+ when 3-phase maximum suffices and PCB area is constrained - not a drop-in replacement for 4-phase designs. |
| ISL6367IRZ-T | 6mm × 6mm QFN-48; supports VRD12/IMVP7; higher integration (integrated MOSFET drivers + PWM logic); ±0.5% VOUT accuracy. | Designed for newer Intel 3rd-gen Core and later CPUs requiring IMVP7 compliance and faster VID response. | Choose ISL6367IRZ-T for IMVP7 platforms or where tighter thermal management (lower RθJA) is required - not VRD11/AMD K8 compatible. |
Compared with MAX8809AETL+, MAX8810AETM+ adds full 4-phase support and dedicated Phase 3 sensing; compared with ISL6367IRZ-T, it targets legacy VRD11/K8 systems with stricter initial accuracy but no IMVP7 features.
Availability
MAX8810AETM+ is available at Aetrix Electronics and suitable for desktop PCs, server motherboards, and workstation VRMs requiring stable component supply, long-term lifecycle support, and guaranteed lead-free packaging.
Supply support for MAX8810AETM+ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for computing, communications, and industrial applications.
The MAX8810AETM+ belongs to Maxim's VRD-compliant CPU power controller product line, engineered specifically for high-current, multi-phase core voltage regulation in Intel and AMD desktop/server platforms with emphasis on accuracy, thermal intelligence, and layout efficiency.
FAQ
What is the maximum supported load current for the MAX8810AETM+?
The MAX8810AETM+ supports up to 150A total load current in 4-phase configurations, as confirmed in the General Description and Electrical Characteristics sections of the datasheet. This rating assumes proper thermal design, appropriate MOSFET selection, and use of the RA² current-sensing architecture to maintain phase balance. The device achieves this using integrated 6A peak gate drivers and adaptive shoot-through protection to sustain high-frequency switching under heavy loads.
Does the MAX8810AETM+ support both Intel VRD11 and AMD K8 Rev F standards?
Yes, the MAX8810AETM+ natively supports both Intel VRD11/VRD10 and AMD K8 Rev F CPU core supply standards. A tri-state SEL input configures VID logic for either platform, and the datasheet explicitly states compliance in the General Description and Features sections. The IC meets all associated requirements including droop control, remote sensing, and startup sequencing - verified through parameter tables covering VRREADY thresholds and VID input levels for both standards.
What package type and dimensions does the MAX8810AETM+ use?
The MAX8810AETM+ uses a 48-pin Thin QFN package measuring 6mm × 6mm (pkg code T4866-1), as specified in the Ordering Information table. It features an exposed thermal paddle and is rated for operation from -40°C to +85°C. This package is distinct from the 40-pin variant used by MAX8809AETL+ and is required to accommodate the additional pins needed for full 4-phase operation, including CS3+ and CS3−.
How does the MAX8810AETM+ implement current sensing for multi-phase operation?
The MAX8810AETM+ supports both inductor DCR and resistive shunt current sensing across all phases, with dedicated inputs: CS1+, CS12−, CS2+, CS3+, and CS3−. Its proprietary Rapid Active Average (RA²) current-mode control eliminates inductance tolerance effects during DCR sensing, delivering precise per-phase current matching and accurate average current limiting (±6% typical). This is confirmed in the General Description and Electrical Characteristics sections, where RA² is cited as enabling superior phase current matching and precise load-line regulation.
What is the purpose of the VRHOT and VRTSET pins on the MAX8810AETM+?
The VRTSET pin programs the VRHOT thermal trip point via an external resistor to GND, setting thresholds between +60°C and +125°C with ±5°C accuracy. The VRHOT output asserts low when temperature exceeds the setpoint, enabling BIOS-coordinated thermal throttling. Both functions are disabled by connecting VRTSET to VCC. This behavior is fully documented in the Pin Description and Electrical Characteristics sections, including accuracy specs and NTC compatibility (e.g., Panasonic ERTJ1VR103).
MAX8810AETM+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 48-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- Applications:
- Controller, Intel VR10, VR11
- Voltage - Input:
- 4.5V ~ 5.5V
- Number of Outputs:
- 1
- Voltage - Output:
- 0.5V ~ 1.6V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TQFN (6x6)
MAX8810AETM+ FAQ
1.How can I place an order for MAX8810AETM+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8810AETM+ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX8810AETM+ reliable?
The price and inventory of MAX8810AETM+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8810AETM+ is usually 5 days.
3.What payment methods are accepted for MAX8810AETM+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8810AETM+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8810AETM+?
MAX8810AETM+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8810AETM+ order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX8810AETM+?
For technical support, including MAX8810AETM+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8810AETM+ requirements.
6.How does Aetrix verify that MAX8810AETM+ is sourced from the original manufacturer or authorized distributors?
All MAX8810AETM+ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX8810AETM+ meets industry standards.
7.What is the process for return or replacement of MAX8810AETM+?
All MAX8810AETM+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX8810AETM+, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX8810AETM+ part is unused and in its original packaging.
Return procedure for MAX8810AETM+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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