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Texas Instruments TPS549B22RVFT
- Part No.:
- TPS549B22RVFT
- Manufacturer:
- Texas Instruments
- Package:
- 40-PowerLFQFN
- Datasheet:
-
TPS549B22RVFT.pdf
- Description:
- IC REG BUCK ADJ 25A 40LQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,628
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Product details
Overview
TPS549B22RVFT from Texas Instruments is a 25A synchronous buck converter with integrated 4.1mΩ/1.9mΩ MOSFETs, D-CAP3™ adaptive on-time control, full differential remote sense, and PMBus® interface. It operates from 1.5V–18V PVIN and 4.5V–22V VDD, delivers 0.6V–5.5V output, and targets high-density point-of-load regulation for ASIC/FPGA core rails.
For engineers reviewing the TPS549B22RVFT datasheet, TPS549B22RVFT pinout, TPS549B22RVFT application, or TPS549B22RVFT equivalent, key selection criteria include its ±0.5% reference accuracy over –40°C to +125°C, programmable 315–1125 kHz switching frequencies, true differential sensing for <±1% load regulation, and NVM-backed PMBus configuration for dynamic voltage margining and fault logging.
Technical Context
The TPS549B22RVFT implements D-CAP3™ control with adaptive on-time modulation, enabling ultra-fast transient response without external compensation. Its internal 0.9V reference (±0.5% tolerance) feeds a precision loop comparator with ±2.5mV offset, while the differential remote sense amplifier (5MHz UGBW, ±4.7V/µs slew rate) rejects PCB IR drop up to 1.8V input range.
PMBus 1.0 compliance enables real-time telemetry (VOUT, IOUT, temperature), programmable OCP via RILIM, and configurable protection modes (hiccup/latch-off OVP/UVP). The device supports on-the-fly VOUT_COMMAND updates, VOUT_MARGIN_HIGH/LOW, and PEC-protected transactions at up to 1MHz clock rate.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| PVIN Range | 1.5V to 18V - supports wide-input industrial and telecom power rails with snubber-enabled 23V SW ringing peak handling. |
| VDD Range | 4.5V to 22V - independent bias supply allows operation with PVIN as low as 1.5V while maintaining full control functionality. |
| Output Current | 25A continuous - enabled by integrated 4.1mΩ high-side and 1.9mΩ low-side NexFET™ MOSFETs in thermally enhanced LQFN-CLIP package. |
| Reference Accuracy | ±0.5% at 0.9V over –40°C to +125°C junction - ensures tight output regulation across automotive-grade thermal range without calibration. |
| Switching Frequency | 315kHz to 1125kHz (8 presets) - programmable via PMBus to optimize efficiency vs. size trade-offs for 1V, 2.5V, or 5V outputs. |
| Differential Sense | True RSP/RSN inputs with ±3.5mV offset - enables accurate remote voltage regulation at load point, critical for sub-1V FPGA core rails. |
| Thermal Resistance | RθJB = 3.6°C/W - low junction-to-board resistance supports >25A operation under natural convection per TI EVM data. |
Pinout & Package
TPS549B22RVFT uses a 7mm × 5mm, 40-pin LQFN-CLIP (RVF) package with exposed thermal pad. Pin numbering follows top-view layout with SW pins (8–12) and PVIN pins (21–25) grouped for low-inductance power routing; AGND (30) and PGND (13–20) are separated to minimize noise coupling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (8–12) | Switch node | High-current output terminal connecting to power inductor; five parallel pins reduce trace inductance and thermal stress. |
| PVIN (21–25) | Main power input | Input supply for integrated FETs; five pins enable robust current sharing and low-impedance path to bulk capacitance. |
| PGND (13–20) | Power ground | Return path for high-side/low-side FET currents; eight pins minimize ground bounce during 25A switching transitions. |
| RSP / RSN (39 / 38) | Differential sense inputs | Non-inverting/inverting inputs to remote sense amplifier; reject common-mode noise for precise load-point regulation. |
| PMB_CLK / PMB_DATA (3 / 2) | PMBus interface | Standard SMBus-compatible digital control interface supporting 1MHz operation, PEC, and alert signaling via SMB_ALRT# (1). |
| VSEL (33) | Startup voltage select | Configures initial VOUT from 0.6V to 1.2V in 50mV steps without external resistor divider, simplifying board-level programming. |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP3™ control mode | Eliminates need for external compensation network while delivering <10µs load-step response for 25A transients. |
| Full differential remote sense | Compensates for up to 100mΩ PCB trace resistance between converter and load, maintaining ±0.5% regulation at point-of-load. |
| NVM-backed PMBus configuration | Retains VOUT_COMMAND, margining settings, and fault thresholds across power cycles without host intervention. |
| Programmable current limit | Adjustable 17–30A valley OCP via RILIM resistor; supports both hiccup and latch-off responses for system-level fault containment. |
| Eco-mode / FCCM selection | Enables high-efficiency light-load operation (Eco-mode) or constant-frequency operation (FCCM) via MODE pin or PMBus command. |
Applications
| Enterprise SSD Power Rail | 5G Baseband Processor Core Supply |
|---|---|
|
Use Scenario: Regulating 0.85V/20A core voltage for NVMe SSD controllers under burst write workloads. IC Role / Device Role / Timing Role: Primary point-of-load buck regulator with differential sense feedback to maintain <±1% output accuracy at die surface. Use Value: Integrated 4.1mΩ/1.9mΩ FETs and 650kHz default switching frequency deliver >92% efficiency at 20A, reducing thermal load in dense M.2 modules. |
Use Scenario: Delivering dynamically scaled 0.6V–1.1V core voltage to 5G baseband SoCs with rapid DVFS transitions. IC Role / Device Role / Timing Role: Digitally programmable buck converter using PMBus VOUT_COMMAND to execute sub-100µs voltage slewing. Use Value: Adaptive on-time D-CAP3™ control achieves <5µs transient recovery, preventing logic errors during 10A/µs load steps. |
| Industrial PLC I/O Module Supply | AI Accelerator Memory Interface Rail |
|
Use Scenario: Generating stable 3.3V/15A supply for isolated I/O channel drivers in harsh factory environments. IC Role / Device Role / Timing Role: Robust DC-DC regulator with latch-off OVP/UVP and thermal shutdown (155°C) for unattended operation. Use Value: RθJB = 3.6°C/W and integrated FETs enable full 15A output with no heatsink under natural convection per TI SOA curves. |
Use Scenario: Powering GDDR6 memory subsystems requiring 1.35V/25A with tight voltage tracking and margining. IC Role / Device Role / Timing Role: High-precision buck converter using VOUT_MARGIN_HIGH/LOW commands for production test validation. Use Value: ±0.5% reference accuracy and true differential sensing ensure <±5mV deviation across 25A load range, meeting JEDEC DDR5 spec. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-current synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP8770GQ-Z | 20A rated, 3.3V–18V input, no PMBus, analog-only control (EN/PGOOD only) | Lacks digital telemetry, remote sense, and programmable frequency; suitable for cost-sensitive fixed-output designs. | Choose when digital control, margining, or differential sensing are unnecessary and BOM cost is primary constraint. |
| ISL9122AIRZ-T7A | 12A rated, 2.5V–5.5V input, I²C interface, no integrated high-side FET (external required) | Requires external 25A-capable high-side switch and compensation network; limited to low-input-voltage systems. | Prefer only for ultra-low-VIN (<3.3V) applications where TPS549B22RVFT's 1.5V minimum PVIN is excessive. |
Compared with MP8770GQ-Z and ISL9122AIRZ-T7A, the TPS549B22RVFT uniquely combines 25A capability, full PMBus configurability, true differential sensing, and integrated high-efficiency FETs in a single 7mm×5mm package-enabling compact, digitally managed, high-accuracy power delivery unattainable with either alternative.
Availability
TPS549B22RVFT is available at Aetrix Electronics and suitable for enterprise storage, 5G infrastructure, and industrial PLC applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TPS549B22RVFT 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 leader specializing in analog, embedded processing, and power management technologies with over 90 years of innovation in high-reliability power conversion.
The TPS549B22RVFT belongs to TI's SWIFT™ family of high-current DC-DC converters, engineered specifically for space-constrained, digitally controlled point-of-load applications in datacenter, telecom, and industrial systems demanding fast transient response and PMBus telemetry.
FAQ
What is the maximum continuous output current supported by the TPS549B22RVFT?
The TPS549B22RVFT supports 25A continuous output current, enabled by its integrated 4.1mΩ high-side and 1.9mΩ low-side NexFET™ MOSFETs and thermally optimized 7mm × 5mm LQFN-CLIP (RVF) package with exposed thermal pad. This rating is validated under natural convection per TI's published safe operating area curves at 12V input and 1V output.
Does the TPS549B22RVFT require external compensation components?
No, the TPS549B22RVFT does not require external compensation components. Its D-CAP3™ control architecture uses emulated current information and adaptive on-time modulation to achieve stable operation with all-ceramic output capacitors, eliminating the need for external RC networks typically required in voltage-mode or current-mode controllers.
How is output voltage programmed on the TPS549B22RVFT?
The TPS549B22RVFT supports dual-mode output voltage programming: pin-strapped via VSEL (0.6V–1.2V in 50mV steps at startup) and dynamic digital adjustment via PMBus VOUT_COMMAND register (0.6V–5.5V range). Both methods retain settings in nonvolatile memory, allowing reconfiguration without host processor involvement.
What thermal performance can be expected from the TPS549B22RVFT in a typical layout?
In a properly designed layout with 2oz copper and thermal vias to inner layers, the TPS549B22RVFT achieves RθJB = 3.6°C/W. TI's EVM data shows it delivers 25A at 1V output with <40°C temperature rise above ambient under natural convection, enabling fanless operation in space-constrained enterprise SSD and networking equipment.
Can the TPS549B22RVFT operate with input voltage below 4.5V?
Yes - the TPS549B22RVFT supports PVIN down to 1.5V independently of VDD. Its VDD supply (4.5V–22V) powers the controller and gate drivers, allowing operation with low PVIN (e.g., 1.8V or 3.3V rails) as long as VDD remains within specification. This decoupling enables flexible power sequencing in multi-rail systems.
TPS549B22RVFT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SWIFT™
- Package/Case:
- 40-PowerLFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1.5V
- Voltage - Input (Max):
- 18V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 25A
- Frequency - Switching:
- Adjustable
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-LQFN-CLIP (7x5)
TPS549B22RVFT FAQ
1.How can I place an order for TPS549B22RVFT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS549B22RVFT 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 TPS549B22RVFT reliable?
The price and inventory of TPS549B22RVFT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS549B22RVFT is usually 5 days.
3.What payment methods are accepted for TPS549B22RVFT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS549B22RVFT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS549B22RVFT?
TPS549B22RVFT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS549B22RVFT 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 TPS549B22RVFT?
For technical support, including TPS549B22RVFT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS549B22RVFT requirements.
6.How does Aetrix verify that TPS549B22RVFT is sourced from the original manufacturer or authorized distributors?
All TPS549B22RVFT 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 TPS549B22RVFT meets industry standards.
7.What is the process for return or replacement of TPS549B22RVFT?
All TPS549B22RVFT units undergo pre-shipment inspection (PSI). If there is an issue with TPS549B22RVFT, 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 TPS549B22RVFT part is unused and in its original packaging.
Return procedure for TPS549B22RVFT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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