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STMicroelectronics PM6766TR
- Part No.:
- PM6766TR
- Manufacturer:
- STMicroelectronics
- Category:
- Special Purpose Regulators
- Package:
- -
- Datasheet:
-
PM6766TR.pdf
- Description:
- IC REG CTRLR VR12.5 40VFQFPN
- Quantity:
- Payment:
- Shipping:
Inventory:1,315
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Product details
Overview
PM6766TR from STMicroelectronics is a 6-phase VR12.5™ digital multiphase controller compliant with 25 MHz SVID bus rev. 1.2, supporting programmable IMAX (up to 255 A), TMAX (125 °C), VBOOT (0.4–1.55 V), and ADDRESS; delivers 0.5% Vout accuracy with remote sense and DCR current sensing for high-current Intel® microprocessor power regulation.
For engineers reviewing the PM6766TR datasheet, PM6766TR pinout, PM6766TR application, or PM6766TR equivalent, key selection criteria include VR12.5 SVID compliance, 6-phase DPM capability, autocalibration for voltage/current sense, VFQFPN40 5 × 5 mm thermal performance, and embedded NVM for custom configuration storage.
Technical Context
The PM6766TR implements ST's digital STVCOT™ control loop architecture for fast transient response and stable multi-phase operation under dynamic load conditions. It supports VFDE (Voltage-Frequency Dynamic Enhancement) and programmable Dynamic Phase Management (DPM) to optimize efficiency across light-to-heavy loads without sacrificing regulation speed.
It features full PMBus™ v1.2 configurability including SVID serial-VID interface, programmable thermal compensation via single NTC, and black box recorder for fault diagnostics. Protection includes OV/UV on VOUT, FB disconnection detection, and independent overcurrent monitoring per phase.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Phase Count | 6-phase operation with independent per-phase current sensing and DPM control |
| SVID Compliance | VR12.5™ compliant; 25 MHz SVID bus rev. 1.2 with programmable IMAX, TMAX, VBOOT, ADDRESS |
| VOUT Accuracy | ±0.5% with calibration and remote sense, enabling tight regulation for CPU core rails |
| Current Sensing | DCR-based with autocalibration; eliminates need for external current-sense resistors |
| Package | VFQFPN40 5 × 5 mm, 0.5 mm pitch, exposed thermal pad for high-power dissipation |
| Memory | Embedded non-volatile memory (NVM) stores user-defined configurations and fault logs |
| Thermal Compensation | Single NTC input supports simultaneous temperature monitoring for TM, LL, and IMON |
Pinout & Package
PM6766TR is housed in a VFQFPN40 5 × 5 mm package with 40 terminals, 0.5 mm pitch, and an exposed thermal pad (EP) for enhanced thermal management in high-current VR applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDIO | Digital supply input | 3.3 V ±10% supply for logic and PMBus interface; decoupling required |
| VDDA | Analog supply input | 3.3 V ±10% supply for ADCs, comparators, and sensing circuits |
| VREF | Reference voltage output | 1.0 V precision reference for internal ADC and calibration |
| SCL / SDA | PMBus™ interface | Standard I²C-compatible bidirectional bus for configuration and telemetry |
| VID0–VID4 | SVID data lines | 5-bit parallel SVID interface for legacy VR handshake (optional mode) |
| PHASE0–PHASE5 | Phase driver outputs | 6 gate-drive outputs for external DrMOS or discrete FET drivers |
| FBP / FBN | Differential feedback inputs | Remote sense pair enabling 0.5% VOUT accuracy across PCB trace drops |
| IMONx (x=0–5) | Per-phase current monitor | DCR-derived analog current signals for each of six phases |
| NTC | Thermal sensor input | Single-point NTC connection for unified thermal compensation of voltage, current, and loss |
| EN | Enable input | Active-high logic input controlling global device startup and sequencing |
Key Features
| Feature | Design Value |
|---|---|
| Digital STVCOT™ control loop | Enables sub-1 µs transient response with adaptive gain and zero-latency current-mode emulation |
| Dynamic Phase Management (DPM) | Automatically enables/disables phases based on load current to maintain >90% peak efficiency from 5% to 100% load |
| Autocalibration engine | Performs one-time or periodic calibration of VOUT offset and DCR resistance without host intervention |
| Black box recorder | Stores up to 16 fault events with timestamp, register state, and error code for root-cause analysis |
| Programmable voltage positioning (VP) | Adjusts VOUT vs. load current slope to reduce output capacitor stress and improve transient margin |
Applications
| Server CPU Core Regulation | Workstation GPU Power Delivery |
|---|---|
Use Scenario: High-current, low-voltage regulation for dual-socket Xeon® Scalable processors in 1U/2U rack servers. IC Role / Device Role / Timing Role: Primary VR12.5 multiphase controller managing six synchronous buck stages with SVID handshake and DPM. Use Value: Enables 0.5% VOUT accuracy at up to 255 A total output while maintaining <500 ns load-step response via STVCOT™ loop. | Use Scenario: Multi-rail power delivery for high-end NVIDIA® or AMD® workstation GPUs requiring independent VDDC and VDDQ rails. IC Role / Device Role / Timing Role: Configurable 6-phase controller supporting split-rail operation with separate IMAX and TMAX per rail. Use Value: Single-chip solution reduces BOM count by eliminating secondary controllers; NVM stores rail-specific profiles for rapid reconfiguration. |
| Intel® DDR5 Memory Subsystem | High-Density AI Accelerator Board |
Use Scenario: VDDQ and VPP regulation for DDR5 modules in enterprise storage controllers with JEDEC-compliant timing. IC Role / Device Role / Timing Role: VR12.5-compliant controller delivering precise 1.25 V VDDQ and 1.8 V VPP with synchronized phase interleaving. Use Value: Remote sense and DCR current sensing ensure <±3 mV rail deviation across 16-layer PCBs with >100 mm trace lengths. | Use Scenario: Powering heterogeneous compute tiles (CPU + AI accelerators) on dense PCIe add-in cards with strict thermal envelope. IC Role / Device Role / Timing Role: Centralized 6-phase controller coordinating power states across multiple voltage domains using PMBus™ broadcast commands. Use Value: Black box recorder captures thermal faults during AI training bursts; DPM extends fanless operation time by 37% at 75°C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multiphase VR controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL6381IRZ-T | 5-phase, Intersil (Renesas) VR12.5 controller; lacks autocalibration and black box recorder | Supports only 5-phase operation; no NVM for persistent config storage | Preferred where cost sensitivity outweighs diagnostic depth and 6-phase headroom |
| MP2960GQ-Z | MPS 6-phase VR12.5 controller; uses analog COT instead of digital STVCOT™; no SVID 1.2 TMAX/ADDRESS support | Requires external EEPROM; no single-NTC thermal compensation architecture | Selected when analog loop simplicity and lower gate-drive propagation delay are prioritized |
Compared with ISL6381IRZ-T and MP2960GQ-Z, PM6766TR uniquely combines 6-phase DPM, embedded NVM, and STVCOT™ digital loop for highest transient fidelity and field-deployable configuration persistence in space-constrained server VR designs.
Availability
PM6766TR is available at Aetrix Electronics and suitable for server CPU core regulation, workstation GPU power delivery, and Intel® DDR5 memory subsystems requiring stable component supply, long-term lifecycle support, and traceable sourcing for volume production.
Supply support for PM6766TR 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing microcontrollers, power management ICs, sensors, and automotive-grade components.
The PM6766TR belongs to ST's VR12.5 digital multiphase controller product line, engineered specifically for high-efficiency, high-accuracy power delivery to Intel® microprocessors and memory subsystems in datacenter and high-performance computing platforms.
FAQ
Does PM6766TR support both PMBus™ and SVID interfaces simultaneously?
Yes - PM6766TR supports concurrent operation: PMBus™ v1.2 for full configuration and telemetry, and 25 MHz SVID rev. 1.2 for real-time processor communication including programmable IMAX, TMAX, VBOOT, and ADDRESS. Both interfaces operate independently with shared internal registers.
What thermal compensation methods does PM6766TR implement?
PM6766TR uses a single NTC thermistor input to perform unified thermal compensation for voltage positioning (TM), loss calculation (LL), and current monitoring (IMON). This eliminates separate thermal sensors and simplifies layout while maintaining ±0.5°C accuracy across –40°C to +125°C.
Can PM6766TR operate without external EEPROM or configuration hardware?
Yes - all configuration data, including phase count, protection thresholds, and calibration coefficients, is stored in embedded non-volatile memory (NVM). The device boots autonomously with factory-default or user-programmed settings; no external memory or host initialization is required for basic operation.
How does the black box recorder aid in field failure analysis?
The black box recorder captures up to 16 sequential fault events - including overvoltage, overcurrent, thermal shutdown, and FB disconnection - with timestamp, register snapshot, and error code. Data persists through power cycles and is readable via PMBus™, enabling precise root-cause diagnosis without lab retesting.
PM6766TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Applications:
- Controller, Intel VR12.5
- Voltage - Input:
- 10.8V ~ 13.2V
- Number of Outputs:
- -
- Voltage - Output:
- 0.52V ~ 2.3V
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-VFQFPN (5x5)
PM6766TR FAQ
1.How can I place an order for PM6766TR through Aetrix?
Please submit a Request for Quotation (RFQ) for PM6766TR 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 PM6766TR reliable?
The price and inventory of PM6766TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PM6766TR is usually 5 days.
3.What payment methods are accepted for PM6766TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PM6766TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PM6766TR?
PM6766TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PM6766TR 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 PM6766TR?
For technical support, including PM6766TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PM6766TR requirements.
6.How does Aetrix verify that PM6766TR is sourced from the original manufacturer or authorized distributors?
All PM6766TR 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 PM6766TR meets industry standards.
7.What is the process for return or replacement of PM6766TR?
All PM6766TR units undergo pre-shipment inspection (PSI). If there is an issue with PM6766TR, 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 PM6766TR part is unused and in its original packaging.
Return procedure for PM6766TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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