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Texas Instruments TPS549B22RVFR
- Part No.:
- TPS549B22RVFR
- Manufacturer:
- Texas Instruments
- Package:
- 40-PowerLFQFN
- Datasheet:
-
TPS549B22RVFR.pdf
- Description:
- IC REG BUCK ADJ 25A 40LQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,272
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Product details
Overview
TPS549B22RVFR 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 in enterprise servers and FPGA core rails.
For engineers reviewing the TPS549B22RVFR datasheet, TPS549B22RVFR pinout, TPS549B22RVFR application, or TPS549B22RVFR equivalent, key selection criteria include its ±0.5% reference accuracy over –40°C to +125°C, programmable 315–1125 kHz switching frequencies via PMBus, true differential sensing for <±2.5 mV loop comparator offset, and thermal performance enabled by its 7mm × 5mm LQFN-CLIP (RVF) package with RθJB = 3.6°C/W.
Technical Context
The TPS549B22RVFR 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 differential amplifier with 5 MHz unity-gain bandwidth and ±4.7 V/µs slew rate, supporting accurate remote voltage sensing across PCB traces.
It integrates dual N-channel NexFET™ power MOSFETs (4.1mΩ HS / 1.9mΩ LS), supports prebias start-up, and offers configurable fault responses (hiccup vs latch-off) for OVP/UVP. PMBus 1.0 compliance includes PEC, SMB_ALRT#, and 29-sequence programmability for VOUT_COMMAND, margining, and fault reporting with NVM backup.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| PVIN Range | 1.5V to 18V - Supports wide-input industrial and telecom supply rails with snubber-enabled 23V SW ringing peak at 25A. |
| VDD Range | 4.5V to 22V - Independent bias rail enables operation with separate low-voltage control logic and high-voltage power input. |
| Output Current | 25A continuous - Achieved via integrated 4.1mΩ/1.9mΩ MOSFETs and optimized thermal design (RθJB = 3.6°C/W). |
| Reference Accuracy | ±0.5% at 0.9V over –40°C to +125°C - Enables tight output regulation without external trimming in harsh environments. |
| Switching Frequencies | 315kHz, 425kHz, 550kHz, 650kHz, 825kHz, 900kHz, 1.025MHz, 1.125MHz - Eight PMBus-selectable options balance efficiency, size, and EMI. |
| Differential Sense Offset | ±2.5mV - Minimizes load regulation error in high-current, long-trace applications like server VRMs. |
| Thermal Resistance | RθJB = 3.6°C/W - Enables high-power density operation with minimal board-level heatsinking under natural convection. |
Pinout & Package
The TPS549B22RVFR is housed in a 7mm × 5mm, 40-pin LQFN-CLIP (RVF) package with exposed thermal pad, RoHS-exempt per TI documentation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PVIN (Pins 21–25) | Power input for integrated FETs | Parallel connection reduces current density and PCB trace losses; rated for 25A continuous with proper layout. |
| SW (Pins 8–12) | Switch node | High-frequency switching output connected to external inductor; requires low-inductance routing to minimize ringing. |
| RSP/RSN (Pins 39/38) | Differential remote sense inputs | Enable Kelvin sensing at load; reject IR drop in power delivery network for ±0.5% regulation accuracy. |
| VSEL (Pin 33) | Startup reference voltage selector | Configures initial VOUT from 0.6V to 1.2V in 50mV steps without feedback resistors-reduces BOM count. |
| PMB_CLK / PMB_DATA (Pins 3/2) | PMBus interface signals | Support 1MHz operation with PEC; enable real-time telemetry, sequencing, and fault logging in digital power systems. |
| PGOOD (Pin 35) | Open-drain power-good indicator | Asserts after soft-start and voltage validation; programmable delay (256µs–131ms) prevents false asserts during transients. |
| ILIM (Pin 36) | Overcurrent limit programming | Resistor-to-ground sets valley current limit (17–30A range); supports precise current limiting without sensing resistors. |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP3™ adaptive on-time control | Eliminates need for external compensation components while delivering <10µs load-step response for ASIC/FPGA dynamic loads. |
| Full differential remote sense amplifier | 5 MHz bandwidth and ±3.5mV input offset ensure <±0.5% load regulation across 100+ mm PCB traces. |
| Integrated 4.1mΩ/1.9mΩ NexFET™ MOSFETs | Enables >90% efficiency at 12V→1V/25A (FCCM mode) with minimal thermal derating in 7mm×5mm footprint. |
| PMBus 1.0 with NVM backup | Stores critical configuration (VOUT_COMMAND, margins, fault thresholds) across power cycles-ensures repeatable system behavior. |
| Programmable soft-start (1/2/4/8 ms) | Prevents inrush current damage to output capacitors and upstream supplies during cold-start or hot-plug events. |
| True prebias start-up support | Allows safe startup into precharged output rails-essential for hot-swap and redundant power architectures. |
Applications
| Enterprise Server Core Rail | FPGA I/O Voltage Regulation |
|---|---|
Use Scenario: Regulating 0.85V core supply for dual-socket Xeon Scalable processors with dynamic current up to 25A. IC Role / Device Role / Timing Role: Primary point-of-load buck regulator with PMBus telemetry for real-time thermal and current monitoring. Use Value: ±0.5% reference accuracy and differential sensing maintain sub-10mV regulation window under 10A/µs load steps, preventing processor throttling. |
Use Scenario: Delivering 1.2V or 1.8V to high-pin-count FPGA I/O banks with strict voltage sequencing and margining requirements. IC Role / Device Role / Timing Role: Digitally programmable power rail with VOUT_MARGIN_HIGH/LOW commands and precise soft-start timing control. Use Value: Pin-strappable MODE/VSEL and on-the-fly PMBus updates eliminate hardware rework during FPGA firmware revisions. |
| Industrial PLC Power Module | SSD Controller Supply |
Use Scenario: Generating isolated 3.3V/5V rails in DIN-rail mounted PLCs operating continuously at 60°C ambient. IC Role / Device Role / Timing Role: High-reliability buck converter with hiccup-mode OVP/UVP and thermal shutdown (155°C trigger). Use Value: RθJB = 3.6°C/W and 125°C max junction rating enable full 25A output without forced air, reducing system cooling cost. |
Use Scenario: Powering NVMe SSD controllers requiring fast transient response and low-noise 1.1V supply with tight ripple specs. IC Role / Device Role / Timing Role: Low-noise, high-efficiency buck stage with FCCM mode selectable via MODE pin to suppress subharmonic oscillation. Use Value: Adaptive on-time control and ceramic-capacitor compatibility achieve <10mVpp ripple at 25A/100kHz without LC filters. |
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 |
|---|---|---|---|
| TPS546B24ARVFR | Same RVF package, 40A rating, higher RDS(on) (4.5mΩ/2.2mΩ), no VSEL pin, fixed 0.6V ref | Targets higher-current applications where 25A headroom is insufficient; lacks analog VOUT programming | Select when >30A continuous output is required and digital-only configuration is acceptable. |
| MP2960GQW-Z | 40-pin QFN, 25A, PMBus 1.3, 0.5% ref, but no differential sense, uses external current-sense resistor | Suitable for cost-sensitive designs where remote sensing is not needed and layout space allows discrete sense resistor | Choose when differential sensing is unnecessary and lower BOM cost outweighs loss of Kelvin accuracy. |
Compared with TPS549B22RVFR, the TPS546B24ARVFR provides higher current capacity at the expense of analog VOUT configurability, while the MP2960GQW-Z trades differential sensing for reduced component count-making TPS549B22RVFR optimal for precision-regulated, thermally constrained, high-density server and FPGA applications.
Availability
TPS549B22RVFR is available at Aetrix Electronics and suitable for enterprise storage, wireless infrastructure, and industrial automation applications requiring stable component supply, long-term lifecycle support, and guaranteed traceability.
Supply support for TPS549B22RVFR 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 and embedded processing technologies, with decades of expertise in power management ICs and digital power interfaces.
The TPS549B22RVFR belongs to TI's SWIFT™ family of high-current DC/DC converters, designed specifically for high-efficiency, digitally controllable point-of-load regulation in datacenter, networking, and industrial computing systems.
FAQ
What is the maximum continuous output current supported by the TPS549B22RVFR?
The TPS549B22RVFR supports 25A continuous output current using its integrated 4.1mΩ high-side and 1.9mΩ low-side NexFET™ MOSFETs. This rating assumes proper PCB layout with thermal vias to the ground plane and natural convection cooling. Derating applies above 60°C ambient per the SOA curves in the datasheet.
Does the TPS549B22RVFR require external compensation components?
No, the TPS549B22RVFR uses D-CAP3™ control architecture with emulated current-mode sensing, eliminating the need for external compensation networks. This simplifies design, reduces BOM count, and ensures stability with all-ceramic output capacitors-critical for compact, high-frequency power stages.
How does the differential remote sense feature improve regulation accuracy in the TPS549B22RVFR?
The TPS549B22RVFR's true differential sense amplifier (RSP/RSN pins) measures voltage directly at the load, rejecting IR drop across PCB traces and connectors. With ±2.5mV loop comparator offset and ±3.5mV input offset, it maintains ±0.5% output regulation even with 100+ mm trace lengths-essential for server VRMs and FPGA boards.
Can the TPS549B22RVFR operate with a precharged output capacitor?
Yes, the TPS549B22RVFR supports true prebias start-up. When enabled, it safely ramps the internal reference without forcing reverse current into a precharged output rail-preventing damage to downstream components and enabling hot-swap and redundant power configurations.
What PMBus commands are supported by the TPS549B22RVFR for voltage margining?
The TPS549B22RVFR supports standard PMBus VOUT_MARGIN_HIGH and VOUT_MARGIN_LOW commands (addresses 0x25 and 0x26), allowing ±5% margining around the nominal VOUT_COMMAND value. These commands are stored in NVM and persist across power cycles, ensuring consistent test and validation behavior.
TPS549B22RVFR 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)
TPS549B22RVFR FAQ
1.How can I place an order for TPS549B22RVFR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS549B22RVFR 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 TPS549B22RVFR reliable?
The price and inventory of TPS549B22RVFR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS549B22RVFR is usually 5 days.
3.What payment methods are accepted for TPS549B22RVFR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS549B22RVFR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS549B22RVFR?
TPS549B22RVFR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS549B22RVFR 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 TPS549B22RVFR?
For technical support, including TPS549B22RVFR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS549B22RVFR requirements.
6.How does Aetrix verify that TPS549B22RVFR is sourced from the original manufacturer or authorized distributors?
All TPS549B22RVFR 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 TPS549B22RVFR meets industry standards.
7.What is the process for return or replacement of TPS549B22RVFR?
All TPS549B22RVFR units undergo pre-shipment inspection (PSI). If there is an issue with TPS549B22RVFR, 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 TPS549B22RVFR part is unused and in its original packaging.
Return procedure for TPS549B22RVFR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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