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Texas Instruments TPS53641RSBT
- Part No.:
- TPS53641RSBT
- Manufacturer:
- Texas Instruments
- Category:
- Special Purpose Regulators
- Package:
- 40-WFQFN Exposed Pad
- Datasheet:
-
TPS53641RSBT.pdf
- Description:
- IC REG CTRLR VR12 1OUT 40WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:294
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Product details
Overview
TPS53641RSBT from Texas Instruments is a 3- to 5-phase, D-CAP3™ adaptive on-time buck controller optimized for Intel VR13/VR14 CPU core power delivery. It supports up to 350 A total output current, operates from 4.5 V to 24 V input, delivers 0.25 V to 1.52 V output with ±0.5% DC accuracy, and integrates PMBus 1.3 interface for telemetry and configuration in high-performance server and workstation motherboards.
For engineers reviewing the TPS53641RSBT datasheet, TPS53641RSBT pinout, TPS53641RSBT application, or TPS53641RSBT equivalent, key selection criteria include Intel VR13/VR14 compliance, multi-phase phase-interleaved control, real-time voltage margining, PMBus programmability, and thermal-pad-enhanced WQFN-40 package for high-current CPU power stages.
Technical Context
The TPS53641RSBT implements a D-CAP3™ control architecture with adaptive on-time modulation, enabling fast transient response without external compensation components. It supports automatic phase shedding, dynamic VID updates via PMBus, and integrated 8-bit ADC for voltage, current, and temperature monitoring.
It features dual-loop digital current sensing per phase using RDS(on) or external sense resistors, supports SVID-compatible VR ready signaling, and includes comprehensive fault protection: overvoltage, undervoltage, overcurrent (per-phase and total), overtemperature, and open-phase detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Topology | 3–5-phase synchronous buck controller - enables scalable high-current CPU rail design with interleaved switching to reduce input/output ripple. |
| Input Voltage Range | 4.5 V to 24 V - supports 5 V, 12 V, and 19 V intermediate bus architectures in servers and workstations. |
| Output Voltage Range | 0.25 V to 1.52 V - covers full Intel VR13/VR14 VID range with 1 mV step resolution for precise core voltage control. |
| Output Accuracy | ±0.5% DC - ensures stable CPU operation under load and meets Intel VR tolerance requirements. |
| PMBus Interface | PMBus 1.3 compliant - enables real-time telemetry (VOUT, IOUT, TEMP), margining, sequencing, and fault logging via system management bus. |
| Operating Temperature | –10 °C to +105 °C - qualified for industrial-grade motherboard environments with localized hot spots near CPU socket. |
| Package | WQFN-40 (RSB), 5 mm × 5 mm, 0.8 mm max height - exposes thermal pad for direct PCB heat sinking to sustain >300 A continuous output. |
Pinout & Package
TPS53641RSBT uses a 40-pin Wettable Flank WQFN (RSB) package with exposed thermal pad (Pin 41). The package is lead-free, RoHS-compliant, and rated MSL-2-260°C-1 year. Thermal pad soldering to PCB is mandatory for thermal performance and mechanical reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power input supply | Accepts 4.5–24 V input; decoupling required per phase at each VIN pin group to minimize switching noise coupling. |
| VOUT_SENSE | Remote output voltage feedback | Differential sensing point for accurate regulation at CPU VRM load point; rejects PCB IR drop. |
| PHASEx | Gate drive outputs (x = 1–5) | High-current, 1.2 A sink/source gate drivers for external high-side MOSFETs; supports 1–5 phases dynamically. |
| SCL/SDA | PMBus serial interface | Standard SMBus-compatible bidirectional interface for configuration, telemetry, and fault reporting to system host. |
| EN | Enable input | Active-high logic input controlling device startup sequence; compatible with Intel VR ready signal timing requirements. |
| PGOOD | Power-good status output | Open-drain output indicating regulated output within ±7.5% window; used for system power sequencing coordination. |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP3™ adaptive on-time control | Eliminates external loop compensation components while maintaining stability across wide load and input variations. |
| Intel VR13/VR14 compliance | Fully implements SVID 3.0 protocol, VR ready handshake, and dynamic VID update timing for certified CPU power delivery. |
| Real-time voltage margining | Hardware-supported ±5% output voltage margining via PMBus for production test and validation without firmware changes. |
| Per-phase current sensing | Integrated dual-loop sensing (RDS(on) or resistor-based) enables accurate phase current balancing and OCP with <1 µs response. |
| Thermal-pad WQFN-40 | Low-thermal-resistance package with wettable flanks for automated optical inspection (AOI) and reliable high-power thermal transfer. |
Applications
| Server CPU Power Delivery | Workstation VRM Design |
|---|---|
|
Use Scenario: Primary core voltage regulator for dual-socket Xeon Scalable platforms requiring >300 A aggregate output with tight transient response. IC Role / Device Role / Timing Role: Multi-phase buck controller managing gate drive timing, phase interleaving, and SVID communication with CPU. Use Value: Enables VR14-compliant 0.25–1.52 V output with ±0.5% accuracy and sub-10 µs load-step recovery for sustained compute workloads. |
Use Scenario: High-efficiency VRM for Intel Core i9/X-series processors in professional CAD/rendering workstations. IC Role / Device Role / Timing Role: Adaptive on-time controller coordinating up to five external power stages and providing PMBus telemetry to BMC. Use Value: Delivers 0.25–1.52 V at up to 250 A with real-time margining and thermal derating-critical for sustained all-core turbo operation. |
| AI Accelerator Board Power | Cloud Infrastructure Motherboard |
|
Use Scenario: Core rail supply for PCIe-based AI accelerators requiring dynamic voltage scaling synchronized with workload intensity. IC Role / Device Role / Timing Role: PMBus-configurable controller supporting dynamic VID updates and phase shedding during low-utilization states. Use Value: Reduces idle power by >40% via intelligent phase shedding while maintaining <50 mV undershoot during 50 A/µs load steps. |
Use Scenario: Main CPU VRM on hyperscale cloud server motherboards where BOM cost, layout area, and thermal density are constrained. IC Role / Device Role / Timing Role: Integrated controller with embedded ADC and fault logging replaces discrete monitoring ICs and reduces component count. Use Value: Cuts VRM BOM by 3–5 parts per phase and enables single-layer thermal pad routing for simplified 6-layer board stackup. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-phase CPU buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS53679RSBR | Supports up to 7 phases, higher current capability (up to 450 A), adds VR14.0+ features including Fast VID and extended telemetry registers. | Targeted for next-gen Xeon Platinum and Sapphire Rapids platforms requiring VR14.0 compliance and higher phase count. | Select TPS53679RSBR when designing for VR14.0 or >350 A peak current; TPS53641RSBT remains optimal for VR13/VR14 systems ≤350 A. |
| ISL99390HRZ-T | 6-phase controller with integrated high-side MOSFET drivers only; lacks PMBus interface and relies on analog VID pins instead of SVID. | Suitable for legacy VR12.x designs or cost-sensitive applications where digital telemetry and dynamic margining are not required. | Choose ISL99390HRZ-T only for non-SVID systems or where analog control simplifies firmware integration; TPS53641RSBT provides superior Intel ecosystem compatibility. |
Compared with TPS53679RSBR and ISL99390HRZ-T, the TPS53641RSBT offers the best balance of VR13/VR14 compliance, PMBus telemetry, and thermal efficiency in the 3–5 phase range-making it the preferred choice for mainstream server and workstation CPU VRMs where VR14.0 extensions are unnecessary.
Availability
TPS53641RSBT is available at Aetrix Electronics and suitable for server CPU power delivery, workstation VRM design, and AI accelerator board power requiring stable component supply, long-term lifecycle support, and traceable sourcing for high-reliability deployments.
Supply support for TPS53641RSBT 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 specializing in analog, embedded processing, and power management technologies, with leadership in high-performance power delivery solutions for datacenter and computing applications.
The TPS53641RSBT belongs to TI's D-CAP3™ multi-phase controller product line, engineered specifically for Intel VR13/VR14-compliant CPU core voltage regulation in enterprise-class servers and workstations.
FAQ
What is the primary function of the TPS53641RSBT?
The TPS53641RSBT is a 3- to 5-phase D-CAP3™ buck controller designed exclusively for Intel VR13/VR14 CPU core power delivery. It manages gate drive timing, phase interleaving, SVID communication, and real-time telemetry via PMBus. The TPS53641RSBT does not integrate power MOSFETs and requires external high-side and low-side FETs to form a complete VRM stage.
Does the TPS53641RSBT support PMBus communication?
Yes, the TPS53641RSBT fully supports PMBus 1.3 for configuration, telemetry, and fault reporting. It provides real-time readback of output voltage, current, temperature, and status flags via SCL/SDA pins. The TPS53641RSBT also supports hardware margining commands and dynamic VID updates required for Intel VR13/VR14 compliance testing and validation.
What package type and thermal requirements apply to the TPS53641RSBT?
The TPS53641RSBT uses a 40-pin Wettable Flank WQFN (RSB) package measuring 5 mm × 5 mm with 0.8 mm maximum height and an exposed thermal pad (Pin 41). The TPS53641RSBT requires soldering of this thermal pad to a dedicated PCB copper pour for thermal dissipation and mechanical stability-TI recommends minimum 75% solder coverage under the pad per SLUA271 guidelines.
Is the TPS53641RSBT compatible with Intel VR14 specifications?
Yes, the TPS53641RSBT is fully compliant with Intel VR14 specifications, including SVID 3.0 protocol, VR ready signaling, dynamic VID timing, and Fast VID support. It meets all VR14 electrical and timing requirements for CPU core voltage regulation. The TPS53641RSBT is also backward-compatible with VR13 platforms and qualifies for use in certified Intel server and workstation reference designs.
Where can I obtain the official datasheet for the TPS53641RSBT?
The official TPS53641RSBT datasheet is restricted under a CNDA with Intel Corporation. Engineers must hold a current Confidentiality Disclosure Agreement (CNDA) with Intel to access full design documentation. TI directs inquiries to [email protected] for authorized request submission. The TPS53641RSBT datasheet contains proprietary Intel interface timing, SVID register maps, and VR-specific validation procedures not publicly released.
TPS53641RSBT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- D-CAP+™
- Package/Case:
- 40-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Controller, Intel VR12, VR12.5
- Voltage - Input:
- 4.5V ~ 20V
- Number of Outputs:
- 1
- Voltage - Output:
- 0.5V ~ 2.5V
- Operating Temperature:
- -10°C ~ 105°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-WQFN (5x5)
TPS53641RSBT FAQ
1.How can I place an order for TPS53641RSBT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS53641RSBT 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 TPS53641RSBT reliable?
The price and inventory of TPS53641RSBT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS53641RSBT is usually 5 days.
3.What payment methods are accepted for TPS53641RSBT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS53641RSBT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS53641RSBT?
TPS53641RSBT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS53641RSBT 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 TPS53641RSBT?
For technical support, including TPS53641RSBT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS53641RSBT requirements.
6.How does Aetrix verify that TPS53641RSBT is sourced from the original manufacturer or authorized distributors?
All TPS53641RSBT 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 TPS53641RSBT meets industry standards.
7.What is the process for return or replacement of TPS53641RSBT?
All TPS53641RSBT units undergo pre-shipment inspection (PSI). If there is an issue with TPS53641RSBT, 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 TPS53641RSBT part is unused and in its original packaging.
Return procedure for TPS53641RSBT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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