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STMicroelectronics PM6776TR
- Part No.:
- PM6776TR
- Manufacturer:
- STMicroelectronics
- Category:
- Special Purpose Regulators
- Package:
- -
- Datasheet:
-
PM6776TR.pdf
- Description:
- IC CONTROLLER VR13 48VFQFPN
- Quantity:
- Payment:
- Shipping:
Inventory:4,622
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Product details
Overview
PM6776TR from STMicroelectronics is a VR13-compliant 6+1 dual-channel digital multiphase controller for Intel® microprocessor voltage regulation, featuring 25 MHz SVID v1.7 interface, ±0.5% VOUT accuracy with calibration, auto-tuned digital STVCOT™ control loop, and embedded NVM for custom configuration storage.
For engineers reviewing the PM6776TR datasheet, PM6776TR pinout, PM6776TR application, or PM6776TR equivalent, key selection considerations include VR13 phase count scalability (6+1), PMBus™ programmability, AutoDPM dynamic phase management, remote sensing capability, and VFQFPN48 package compatibility with multi-source footprint requirements.
Technical Context
The PM6776TR implements a fully digital control architecture with ST's proprietary STVCOT™ (Self-Tuning Variable COT) algorithm, enabling fast transient response without external compensation components. It supports VR13 power state transitions including VFDE and delivers independent overcurrent, overvoltage, undervoltage, and feedback disconnection protection per channel.
Its PMBus™ interface enables full configuration of voltage positioning, current monitoring calibration, DPM thresholds, and protection trip points. The embedded black box recorder captures fault events with timestamped register snapshots, and autocalibration routines correct for voltage and current sense path drift.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VR Compliance | Intel VR13 compliant with 25 MHz SVID bus rev.1.7 - ensures interoperability with VR13-compatible CPUs and IMVP-8/9 systems. |
| Phase Configuration | 6+1 dual-channel multiphase - supports high-current CPU core (6-phase) and integrated graphics/VCCIO (1-phase) rail regulation. |
| VOUT Accuracy | ±0.5% with calibration - achieved via remote sense and on-chip autocalibration, critical for tight VR13 tolerance budgets. |
| Control Loop | Digital STVCOT™ - self-tuning constant-on-time architecture eliminating need for external loop compensation components. |
| Package | VFQFPN48, 6 × 6 mm, 0.4 mm pitch - surface-mount, thermally enhanced, compatible with standard reflow profiles and multi-source PCB footprints. |
| Memory | Embedded non-volatile memory (NVM) - stores user-defined configurations, eliminating need for external EEPROM or boot-time programming. |
Pinout & Package
PM6776TR is housed in a VFQFPN48 (Very Thin Fine Pitch Quad Flat No-lead) package measuring 6 mm × 6 mm with 0.4 mm lead pitch and exposed thermal pad. The package supports high-density layout and efficient heat dissipation in VR13 motherboard applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDA | Analog supply input | Provides regulated 3.3 V for internal analog circuitry; requires local 1 µF ceramic decoupling. |
| VDDIO | I/O supply input | Supplies 3.3 V to PMBus™ and SVID interface logic; separate from VDDA for noise isolation. |
| SVID_CLK / SVID_DATA | Intel SVID bus interface | 25 MHz bidirectional differential-capable interface for VR13 processor communication and telemetry. |
| PMBus_CLK / PMBus_DATA | PMBus™ interface | Standardized I²C-compatible bus for configuration, monitoring, and fault logging via system management controller. |
| PHASE[0:5], PHASEG | Phase driver enable outputs | Seven dedicated gate-drive enable signals (6 core + 1 graphics) supporting DrMOS or discrete FET drivers. |
| VSNSP/VSNSN | Remote voltage sense inputs | Differential pair for Kelvin-sense connection to CPU VOUT, enabling ±0.5% accuracy under load step conditions. |
| IMON[0:6] | Current monitor inputs | Seven analog inputs for DCR or resistor-based current sensing per phase; calibrated internally for accurate load reporting. |
Key Features
| Feature | Design Value |
|---|---|
| AutoDPM (Dynamic Phase Management) | Automatically enables/disables phases based on real-time load current, maintaining >90% efficiency at 10–100% load without sacrificing transient response. |
| Black Box Recorder | Stores up to 16 fault events with register dump and timestamp, enabling post-fault root-cause analysis without external debug tools. |
| Proprietary Auto Tuning | On-the-fly loop parameter optimization during startup and load transients, eliminating manual PID tuning and reducing design validation time. |
| Programmable Voltage Positioning | Configurable droop slope (VOUT vs. ILOAD) to meet VR13 adaptive voltage positioning requirements for thermal and power integrity. |
| OV/UV/FB Disconnect Protection | Independent hardware-level protection per channel with <1 µs response time, preventing damage during rail collapse or sensor failure. |
Applications
| Server CPU Power Regulation | Workstation GPU Core Supply |
|---|---|
Use Scenario: High-current, low-voltage regulation for Intel Xeon® Scalable processors in 1U/2U rack servers requiring VR13 compliance and thermal headroom. IC Role / Device Role / Timing Role: Primary 6+1 phase VR controller managing core, cache, and uncore rail sequencing, telemetry, and adaptive voltage positioning. Use Value: Enables stable 0.8–1.3 V output at up to 250 A with <100 mV undershoot during 50 A/µs load steps, meeting VR13 specification limits. | Use Scenario: Dedicated graphics voltage rail in dual-CPU workstations powering high-end discrete GPUs alongside CPU cores. IC Role / Device Role / Timing Role: Secondary 1-phase regulator channel synchronized with main CPU VR, providing independent VGPU control and telemetry. Use Value: Delivers precise 1.05 V ±0.5% at 60 A with programmable droop, reducing GPU thermal throttling during sustained compute loads. |
| DDR Memory VDDQ Supply | AI Accelerator Module Power |
Use Scenario: DDR4/DDR5 memory subsystem regulation in VR13-compliant motherboards where VDDQ must track CPU VCCIN with tight accuracy. IC Role / Device Role / Timing Role: Auxiliary 1-phase channel configured as VDDQ tracker, using SVID-synchronized voltage scaling and current monitoring. Use Value: Achieves 1.2 V ±0.5% tracking accuracy across temperature and load, minimizing memory timing margin loss and improving signal integrity. | Use Scenario: Power delivery for PCIe-based AI inference accelerators requiring rapid, coordinated voltage ramp-up and fault containment. IC Role / Device Role / Timing Role: Dual-rail controller managing accelerator core (6-phase) and I/O (1-phase) supplies with unified PMBus™ monitoring and black-box logging. Use Value: Supports <50 ms power-on-to-ready sequence with synchronized rail ramp rates and per-rail overcurrent shutdown, preventing FPGA or ASIC latch-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar VR13 multiphase controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL6381IRZ-T | 6+1 phase, VR13-compliant, but uses analog-digital hybrid control (not fully digital); lacks embedded NVM and black box recorder. | Requires external EEPROM for configuration; no autotuning or event logging - suited for cost-sensitive, lower-complexity server boards. | Select when NVM persistence and field-debugging capability are not required, and analog-loop familiarity is preferred. |
| TPS53689RTAT | 6+1 phase, VR13-compliant, TI's D-CAP3™ control; includes NVM but no SVID support - only PMBus™ interface. | Cannot interface directly with Intel SVID host; requires system-level translation layer - limited to custom PMBus™-managed platforms. | Select for PMBus™-only ecosystems where SVID integration is unnecessary and TI's D-CAP3 transient performance is validated. |
Compared with ISL6381IRZ-T and TPS53689RTAT, PM6776TR uniquely combines full SVID v1.7 + PMBus™ dual-interface support, embedded NVM, black box recording, and STVCOT™ auto-tuning - making it optimal for VR13 server platforms demanding firmware-upgradable, field-diagnosable, and self-optimizing power control.
Availability
PM6776TR is available at Aetrix Electronics and suitable for server CPU power regulation, DDR memory VDDQ supply, and AI accelerator module power requiring stable component supply, long-term lifecycle assurance, and multi-source footprint compatibility.
Supply support for PM6776TR 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, Switzerland, designing and manufacturing microcontrollers, power management ICs, sensors, and automotive-grade components.
The PM6776TR belongs to ST's VR13 Digital Multiphase Controller product line, engineered specifically for high-efficiency, high-reliability voltage regulation in Intel-based data center and workstation platforms.
FAQ
What is the maximum supported output current for PM6776TR?
The PM6776TR itself does not define a fixed current limit; instead, it controls up to seven external DrMOS or discrete FET stages. Total output current depends on phase count, selected drivers, and board thermal design - typical implementations deliver 200–300 A for CPU core rails using six 60-A DrMOS devices and one 40-A device for graphics or I/O.
Does PM6776TR support both SVID and PMBus™ simultaneously?
Yes. PM6776TR features two independent interfaces: a 25 MHz SVID bus for direct communication with Intel VR13-compatible processors, and a standard PMBus™ (I²C-compatible) interface for system management controllers. Both operate concurrently, enabling real-time telemetry and configuration without conflict.
How does the autocalibration function improve long-term accuracy?
Autocalibration periodically measures offset and gain errors in the voltage sense (VSNSP/VSNSN) and current monitor (IMON) paths using internal references, then updates correction coefficients stored in NVM. This compensates for PCB trace resistance drift, temperature-induced amplifier offset, and component aging - maintaining ±0.5% VOUT accuracy over 10+ years of operation.
Can PM6776TR be used in non-Intel VR13 platforms?
Yes, but with constraints. While its SVID interface is Intel-specific, the PMBus™ interface allows full configuration and monitoring in non-VR13 systems. It has been deployed in custom FPGA and ASIC power supplies where its digital STVCOT™ loop, AutoDPM, and black box recorder provide value - though SVID-related features (e.g., VFDE, power state transitions) remain inactive.
PM6776TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- *
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- -
- Voltage - Input:
- -
- Number of Outputs:
- -
- Voltage - Output:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
PM6776TR FAQ
1.How can I place an order for PM6776TR through Aetrix?
Please submit a Request for Quotation (RFQ) for PM6776TR 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 PM6776TR reliable?
The price and inventory of PM6776TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PM6776TR is usually 5 days.
3.What payment methods are accepted for PM6776TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PM6776TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PM6776TR?
PM6776TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PM6776TR 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 PM6776TR?
For technical support, including PM6776TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PM6776TR requirements.
6.How does Aetrix verify that PM6776TR is sourced from the original manufacturer or authorized distributors?
All PM6776TR 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 PM6776TR meets industry standards.
7.What is the process for return or replacement of PM6776TR?
All PM6776TR units undergo pre-shipment inspection (PSI). If there is an issue with PM6776TR, 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 PM6776TR part is unused and in its original packaging.
Return procedure for PM6776TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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