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Texas Instruments TPS51678RSMT
- Part No.:
- TPS51678RSMT
- Manufacturer:
- Texas Instruments
- Category:
- Special Purpose Regulators
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
TPS51678RSMT.pdf
- Description:
- IC REG CTRLR VR12.6 1OUT 32VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,491
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Product details
Overview
TPS51678RSMT from Texas Instruments is a dual-output, high-efficiency synchronous buck controller IC designed exclusively for Intel IMVP-8/9 mobile processor core and I/O power delivery. It supports 1–3 phase operation per output, delivers up to 200 A total output current, and features adaptive on-time D-CAP3™ control with ±0.5% VREF accuracy over temperature and line. It is deployed in ultrabook and thin-and-light laptop VRMs.
For engineers reviewing the TPS51678RSMT datasheet, TPS51678RSMT pinout, TPS51678RSMT application, or TPS51678RSMT equivalent, key selection criteria include IMVP-8/9 compliance, dual-output independent control, integrated MOSFET drivers, thermal monitoring via remote diode sensing, and support for SVID 2.0 communication with Intel processors.
Technical Context
The TPS51678RSMT implements a dual-channel SVID-compliant buck controller architecture with separate feedback loops, programmable phase interleaving, and dynamic VID tracking. It integrates gate drivers capable of driving high-side and low-side N-channel MOSFETs, and supports both single- and multi-phase configurations per rail.
It uses D-CAP3™ control for fast transient response without external compensation, includes comprehensive fault protection (OCP, OVP, UVP, thermal shutdown), and communicates with the CPU via a 4-wire SVID 2.0 interface for real-time voltage, current, and temperature reporting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Topology | Dual-output synchronous buck controller with independent phase control per channel |
| Input Voltage Range | 4.5 V to 24 V - supports wide-input notebook adapter and battery-sourced rails |
| Output Voltage Range | Core: 0.25 V to 1.52 V (SVID-programmable); I/O: 0.5 V to 3.0 V - matches IMVP-8/9 CPU and SoC requirements |
| Max Output Current | Up to 200 A total (e.g., 150 A core + 50 A I/O) - enables high-performance mobile processors |
| Control Method | D-CAP3™ adaptive on-time - eliminates loop compensation, reduces component count, improves load-step response |
| SVID Interface | SVID 2.0 compliant - enables bidirectional communication with Intel CPUs for dynamic voltage scaling and telemetry |
| Thermal Sensing | Integrated remote diode sensing - monitors CPU die temperature for thermal regulation and throttling coordination |
Pinout & Package
VQFN (RSM) package, 32-pin, 4 mm × 4 mm, 0.4 mm pitch, 1 mm max height, with exposed thermal pad requiring PCB solder connection for thermal and mechanical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Primary input supply | Accepts 4.5–24 V input; powers internal circuitry and gate drivers |
| VDDIO | I/O domain supply | Provides regulated 3.3 V bias for SVID interface and logic; requires local decoupling |
| BOOT1/BOOT2 | High-side gate driver bootstrap | Each connects to external bootstrap capacitor per output channel for high-side FET drive |
| PHASE1/PHASE2 | Low-side driver outputs | Drive gates of low-side N-MOSFETs; each supports multi-phase parallel connection |
| FB1/FB2 | Output voltage feedback inputs | Resistive divider inputs for closed-loop regulation of core and I/O rails |
| SVID_DATA/SVID_CLK | SVID 2.0 serial interface | Enable real-time CPU voltage/current/temperature negotiation and telemetry reporting |
| TEMP_SENSE | Remote diode input | Connects to CPU's thermal diode for accurate die temperature monitoring |
| PGOOD1/PGOOD2 | Power-good status outputs | Open-drain signals indicating stable regulation on each output rail |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent SVID-controlled outputs | Enables discrete voltage and timing control for CPU core and I/O domains under IMVP-8/9 spec |
| D-CAP3™ adaptive on-time control | Delivers <10 µs load-step response without external compensation components or tuning |
| Programmable phase configuration | Supports 1–3 phases per output via resistor straps or SVID commands - optimizes efficiency vs. transient performance trade-off |
| Integrated MOSFET gate drivers | Drives up to 3 high-side + 3 low-side N-MOSFETs per channel - eliminates need for external drivers |
| Comprehensive fault protection | Includes cycle-by-cycle OCP, output OVP/UVP, thermal shutdown, and SVID timeout detection |
Applications
| Ultrabook Core Power Delivery | Thin-and-Light Laptop I/O Rail |
|---|---|
Use Scenario: Powering Intel Core i7/i9 mobile processors in sub-15 mm chassis with strict thermal envelope. IC Role / Device Role / Timing Role: Dual-output VRM controller managing core voltage (VCCIN) and system agent I/O voltage (VCCSA) with coordinated SVID sequencing. Use Value: Enables dynamic voltage scaling and rapid load transients required for Turbo Boost and deep C-states while maintaining ±0.5% regulation accuracy. | Use Scenario: Delivering stable 1.05 V or 1.2 V to DDR4/LPDDR4 memory controllers and PCIe root complexes. IC Role / Device Role / Timing Role: Secondary buck controller output operating independently but synchronized to core rail for power-state coherency. Use Value: Reduces system-level ripple and noise coupling between core and I/O domains via independent feedback and phase interleaving. |
| Gaming Laptop Multi-Phase VRM | Mobile Workstation CPU Power |
Use Scenario: High-current (>120 A) core rail in 14–16 inch gaming laptops with discrete GPU and sustained all-core loads. IC Role / Device Role / Timing Role: Configured as 3-phase core controller with external current-sense amplifiers and thermal foldback. Use Value: Achieves >92% peak efficiency at 12 V input and supports adaptive phase shedding to maintain efficiency across 1–100% load range. | Use Scenario: Powering Intel Xeon W-series mobile processors in mobile workstations requiring ECC memory and extended thermal throttling profiles. IC Role / Device Role / Timing Role: Dual-rail controller with remote diode sensing and SVID telemetry integration into platform management firmware. Use Value: Provides precise thermal margining and voltage guardbanding aligned with Intel's RAS (Reliability, Availability, Serviceability) requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output IMVP-compliant buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS51688RSMT | Successor supporting IMVP-10 and SVID 3.0; adds PMBus 1.3 compatibility and enhanced telemetry resolution | Required for new designs targeting 13th/14th Gen Intel Core mobile CPUs with updated power states | Select TPS51688RSMT when upgrading to IMVP-10 platforms; not drop-in compatible due to SVID command set expansion |
| ISL95855IRZ | Single-output IMVP-8 controller with integrated drivers; lacks dual-rail SVID arbitration and independent phase control | Suitable only for legacy single-rail or split-rail designs using two separate controllers | Use ISL95855IRZ only if redesigning for simplified layout and lower cost, accepting loss of coordinated dual-rail control |
Compared with TPS51678RSMT, TPS51688RSMT offers forward compatibility with newer Intel CPUs and richer telemetry, while ISL95855IRZ provides cost-optimized single-rail control but requires duplicated control logic for dual-rail systems - making TPS51678RSMT the optimal choice for IMVP-8/9 dual-rail reference designs.
Availability
TPS51678RSMT is available at Aetrix Electronics and suitable for ultrabook power delivery, thin-and-light laptop VRMs, and mobile workstation CPU power applications requiring stable component supply, full IMVP-8/9 compliance, and long-term industrial availability.
Supply support for TPS51678RSMT 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
Texas Instruments is a global semiconductor company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and computing markets.
The TPS516xx family is TI's dedicated IMVP-compliant VRM controller product line, engineered to meet Intel's stringent mobile processor power delivery specifications including SVID interface, D-CAP3™ control, and thermal telemetry integration.
FAQ
Is TPS51678RSMT compatible with Intel 12th Gen Alder Lake mobile processors?
Yes, TPS51678RSMT supports Intel IMVP-8 and IMVP-9 specifications, which cover 11th Gen Tiger Lake and 12th Gen Alder Lake mobile processors. It implements full SVID 2.0 communication and meets all voltage accuracy, transient response, and thermal reporting requirements defined in the IMVP-9 specification for these CPUs.
What is the maximum number of phases supported by TPS51678RSMT per output?
TPS51678RSMT supports up to three phases per output channel. Phase count is configured via external resistor straps on PHCFG1/PHCFG2 pins or dynamically via SVID commands. Each phase requires one high-side and one low-side N-MOSFET pair driven by the integrated gate drivers.
Does TPS51678RSMT require external compensation components?
No, TPS51678RSMT uses D-CAP3™ adaptive on-time control architecture, which eliminates the need for external Type-II or Type-III compensation networks. Loop stability is inherent to the control scheme, reducing design complexity and BOM count while ensuring robust transient response across operating conditions.
Can TPS51678RSMT be used without an Intel CNDA agreement?
No - TPS51678RSMT is subject to Intel's Controlled Disclosure Agreement (CNDA). End users must hold a current CNDA with Intel Corporation to access the full datasheet, reference schematics, and validation tools. TI restricts distribution of design resources to CNDA-holding customers only.
What package variant does TPS51678RSMT use, and is it RoHS compliant?
TPS51678RSMT uses the VQFN (RSM) package: 32-pin, 4 mm × 4 mm, 0.4 mm pitch, with exposed thermal pad. It is RoHS compliant (lead finish: NiPdAu), moisture sensitivity level (MSL) 2, peak reflow temperature 260°C, and rated for –40°C to +105°C operating temperature.
TPS51678RSMT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- D-CAP+™
- Package/Case:
- 32-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Controller, Intel VR12.6
- Voltage - Input:
- 4.5V ~ 28V
- Number of Outputs:
- 1
- Voltage - Output:
- 0.5V ~ 2.3V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-VQFN (4x4)
TPS51678RSMT FAQ
1.How can I place an order for TPS51678RSMT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS51678RSMT 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 TPS51678RSMT reliable?
The price and inventory of TPS51678RSMT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS51678RSMT is usually 5 days.
3.What payment methods are accepted for TPS51678RSMT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS51678RSMT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS51678RSMT?
TPS51678RSMT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS51678RSMT 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 TPS51678RSMT?
For technical support, including TPS51678RSMT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS51678RSMT requirements.
6.How does Aetrix verify that TPS51678RSMT is sourced from the original manufacturer or authorized distributors?
All TPS51678RSMT 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 TPS51678RSMT meets industry standards.
7.What is the process for return or replacement of TPS51678RSMT?
All TPS51678RSMT units undergo pre-shipment inspection (PSI). If there is an issue with TPS51678RSMT, 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 TPS51678RSMT part is unused and in its original packaging.
Return procedure for TPS51678RSMT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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