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Texas Instruments TPS544C25RVFT
- Part No.:
- TPS544C25RVFT
- Manufacturer:
- Texas Instruments
- Package:
- 40-PowerLFQFN
- Datasheet:
-
TPS544C25RVFT.pdf
- Description:
- IC REG BUCK ADJ 30A 40LQFN
- Quantity:
- Payment:
- Shipping:
Inventory:11,628
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Product details
Overview
TPS544C25RVFT from Texas Instruments is a PMBus™-compliant 30-A synchronous buck converter with integrated NexFET™ power stage, operating from 4.5 V to 18 V input and delivering 0.5 V to 5.5 V output. It features 500 kHz nominal switching frequency, 0.5% reference accuracy at ≥600 mV, lossless low-side current sensing, and differential remote voltage sensing - deployed in high-density server and enterprise storage power rails.
For engineers reviewing the TPS544C25RVFT datasheet, TPS544C25RVFT pinout, TPS544C25RVFT application, or TPS544C25RVFT equivalent, key selection criteria include its 30-A continuous output rating, LQFN-40 (5 mm × 7 mm) thermal-pad package, PMBus programmability for AVS/margining, and verified thermal shutdown at 135°C–155°C junction temperature.
Technical Context
The TPS544C25RVFT implements voltage-mode control with input feed-forward for fast transient response and stable loop behavior across wide VIN and VOUT ranges. Its integrated 5.5-mΩ high-side and 2.0-mΩ low-side NexFET™ power stage enables high-efficiency operation up to 30 A without external MOSFETs or drivers.
PMBus 1.2 compliance enables full digital configuration: VOUT_COMMAND for dynamic voltage scaling, programmable OCP/OTP/UVLO thresholds, soft-start/soft-stop timing, fault response modes (restart/latch-off), and real-time reporting of output voltage, current, and external temperature via 2N3904 interface.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 30 A continuous - supports high-power ASIC/FPGA core rails without parallel phases |
| Input Voltage Range | 4.5 V to 18 V - compatible with 12-V intermediate bus architectures in servers and switches |
| Output Voltage Range | 0.5 V to 5.5 V - covers CPU/GPU core, memory, and I/O supply requirements |
| Switching Frequency | 200 kHz to 1 MHz (pin-strappable or sync-capable) - enables optimization of size vs. efficiency |
| Reference Accuracy | ±0.5% at ≥600 mV - ensures tight regulation for sub-1-V logic supplies |
| Thermal Shutdown | 135°C to 155°C (typ. 145°C) with 15°C–25°C hysteresis - protects against sustained overload or airflow loss |
| PMBus Compliance | PMBus 1.2 - supports standard commands including VOUT_COMMAND, READ_VOUT, READ_IOUT, MFR_SPECIFIC |
Pinout & Package
TPS544C25RVFT uses a 40-pin LQFN package (5.00 mm × 7.00 mm) with exposed thermal pad soldered to PCB ground for optimal thermal performance. Junction-to-board thermal resistance is 4.2°C/W, enabling high-power delivery in compact layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (pins 21–25) | Power stage input | High-current input path requiring low-inductance bypassing to PGND |
| SW (pins 8–12) | Switch node | Connects to output inductor; critical for EMI and efficiency; ties to BOOT capacitor |
| BOOT (pin 7) | High-side gate driver bootstrap | Requires 100-nF ceramic capacitor to SW for gate drive integrity |
| FB (pin 34) | Feedback sense input | Inverting input of error amplifier; sets regulated output voltage via resistor divider |
| VOUTS+ / VOUTS− (pins 31–32) | Differential remote sense | Enables accurate load regulation by compensating for PCB IR drop |
| PGOOD (pin 36) | Power-good open-drain flag | Signals valid regulation; pulls low on UV/OV/OT/OC faults |
| RT (pin 40) | Frequency setting | Resistor to AGND programs switching frequency (200–1000 kHz) |
| SYNC/RESET_B (pin 39) | Sync clock input or reset trigger | Configurable: synchronizes to external clock or restores default VOUT on logic-low pulse |
Key Features
| Feature | Design Value |
|---|---|
| Integrated NexFET™ power stage | 5.5-mΩ high-side + 2.0-mΩ low-side MOSFETs eliminate external FETs and drivers, reducing BOM and layout complexity |
| Lossless low-side current sensing | Eliminates sense resistor power loss and board area while enabling accurate real-time current reporting |
| Differential remote sensing (VOUTS+/VOUTS−) | Compensates for voltage drop across PCB traces, ensuring ±0.5% regulation at point-of-load |
| PMBus-programmable AVS & margining | Supports adaptive voltage scaling for dynamic power optimization and production-level voltage tolerance validation |
| Monotonic start-up into pre-biased output | Prevents reverse current flow during hot-insertion or multi-rail sequencing, protecting downstream loads |
Applications
| Server CPU Core Supply | Enterprise SSD Power Rail |
|---|---|
Use Scenario: Delivering tightly regulated 0.8 V @ 25 A to dual-socket Xeon processors in 1U rack servers with strict thermal envelope. IC Role / Device Role / Timing Role: Primary core voltage regulator with PMBus-controlled AVS to reduce dynamic power during low-utilization states. Use Value: Achieves >90% efficiency at 20 A with 500 kHz switching, minimizing heatsink size and airflow demand. |
Use Scenario: Providing 1.2 V @ 18 A and 3.3 V @ 3 A to NVMe SSD controller and NAND flash arrays in high-throughput storage arrays. IC Role / Device Role / Timing Role: High-density, digitally configurable buck converter supporting rapid firmware-based voltage margining during qualification testing. Use Value: Differential remote sensing maintains ±5 mV regulation accuracy at SSD connector despite 50 mΩ trace resistance. |
| Ethernet Switch ASIC Supply | Optical Transport Line Card |
Use Scenario: Powering 7-nm switch ASICs requiring 0.75 V @ 30 A with fast transient response to burst traffic loads. IC Role / Device Role / Timing Role: Single-phase 30-A buck converter with monotonic start-up and programmable soft-start to coordinate with SerDes power sequencing. Use Value: Integrated current sensing enables real-time thermal derating based on measured IOUT, preventing overtemperature shutdown during sustained line-rate forwarding. |
Use Scenario: Generating 1.8 V @ 12 A for coherent DSPs and 5 V @ 2 A for analog front-end in CFP2/CFP4 optical modules with space-constrained PCBs. IC Role / Device Role / Timing Role: Dual-output capable converter (via secondary TPS544C25RVFT or companion device) with frequency synchronization to suppress beat frequencies in sensitive RF sections. Use Value: 5 mm × 7 mm LQFN package allows placement directly beneath DSP BGA, minimizing power loop inductance and improving EMI performance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS544B25RVFT | 20-A rated output; identical pinout, package, and feature set but lower current capability and reduced OCP threshold (24 A vs. 36 A) | Suitable for mid-tier switches or storage controllers with <25 A peak load; lower thermal stress at same layout | Select when system peak current stays below 22 A and cost reduction is prioritized over headroom |
| ISL9122AIRZ-T7A | 20-V input, 12-A output; integrates 3.3-V LDO; no PMBus; uses constant-on-time control instead of voltage mode | Better suited for portable or battery-backed systems requiring ultra-low quiescent current (<30 µA), not datacenter-grade telemetry | Choose only for non-PMBus designs where digital configurability and 30-A capacity are unnecessary |
Compared with TPS544B25RVFT, the TPS544C25RVFT delivers 50% higher current in identical footprint and adds programmable AVS - critical for server CPU power optimization. Against ISL9122AIRZ-T7A, it offers full telemetry, robust fault handling, and scalable current, making it the sole choice for infrastructure-class applications demanding PMBus visibility and 30-A capability.
Availability
TPS544C25RVFT is available at Aetrix Electronics and suitable for server motherboard design, enterprise SSD power management, and optical transport line card development requiring stable component supply and long-term industrial availability.
Supply support for TPS544C25RVFT 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 ICs, with decades of expertise in high-efficiency DC-DC conversion for mission-critical infrastructure.
The TPS544x25 product line was designed specifically for high-density, digitally controlled point-of-load regulation in cloud-scale servers, networking equipment, and storage systems - emphasizing PMBus telemetry, thermal resilience, and seamless integration with system management controllers.
FAQ
What is the maximum continuous output current of the TPS544C25RVFT?
The TPS544C25RVFT is rated for 30 A continuous output current under recommended operating conditions (TJ ≤ 125°C, adequate PCB copper and airflow). This rating assumes proper thermal design using the exposed thermal pad and is validated per TI's SOA curves in the datasheet. Derating applies above 85°C ambient or with limited airflow.
Does the TPS544C25RVFT support differential remote voltage sensing?
Yes, the TPS544C25RVFT supports differential remote sensing via dedicated VOUTS+ (pin 31) and VOUTS− (pin 32) inputs. This function feeds both the internal voltage control loop and PMBus READ_VOUT reporting, enabling precise regulation at the load by compensating for PCB trace resistance - critical for sub-1-V supplies with tight tolerances.
Can the TPS544C25RVFT be synchronized to an external clock source?
Yes, the TPS544C25RVFT supports external frequency synchronization via the SYNC/RESET_B pin (pin 39). When configured for SYNC mode, it accepts an external clock signal from 200 kHz to 1200 kHz, allowing noise-sensitive systems to avoid beat frequencies and align switching with other converters in multi-rail power architectures.
What is the default overcurrent fault threshold for the TPS544C25RVFT?
The factory-default overcurrent fault threshold for the TPS544C25RVFT is 36 A, with programmable range from 5 A to 40 A via PMBus command. This threshold is implemented using lossless low-side MOSFET RDS(on) sensing and includes thermal compensation to maintain accuracy across junction temperatures from –40°C to 125°C.
Is the TPS544C25RVFT pin-compatible with the TPS544B25RVFT?
Yes, the TPS544C25RVFT and TPS544B25RVFT share identical 40-pin LQFN (RVF) packaging, pinout, and footprint. They are hardware-compatible drop-in replacements - differing only in current rating (30 A vs. 20 A), internal current limit thresholds, and associated thermal design margins. No PCB changes are required when upgrading.
TPS544C25RVFT 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):
- 4.5V
- Voltage - Input (Max):
- 18V
- Voltage - Output (Min/Fixed):
- 0.5V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 30A
- Frequency - Switching:
- 200kHz ~ 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-LQFN-CLIP (7x5)
TPS544C25RVFT FAQ
1.How can I place an order for TPS544C25RVFT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS544C25RVFT 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 TPS544C25RVFT reliable?
The price and inventory of TPS544C25RVFT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS544C25RVFT is usually 5 days.
3.What payment methods are accepted for TPS544C25RVFT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS544C25RVFT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS544C25RVFT?
TPS544C25RVFT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS544C25RVFT 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 TPS544C25RVFT?
For technical support, including TPS544C25RVFT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS544C25RVFT requirements.
6.How does Aetrix verify that TPS544C25RVFT is sourced from the original manufacturer or authorized distributors?
All TPS544C25RVFT 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 TPS544C25RVFT meets industry standards.
7.What is the process for return or replacement of TPS544C25RVFT?
All TPS544C25RVFT units undergo pre-shipment inspection (PSI). If there is an issue with TPS544C25RVFT, 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 TPS544C25RVFT part is unused and in its original packaging.
Return procedure for TPS544C25RVFT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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