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Texas Instruments TPS544C20RVFR
- Part No.:
- TPS544C20RVFR
- Manufacturer:
- Texas Instruments
- Package:
- 40-PowerLFQFN
- Datasheet:
-
TPS544C20RVFR.pdf
- Description:
- IC REG BUCK ADJ 30A 40LQFN
- Quantity:
- Payment:
- Shipping:
Inventory:7,217
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Product details
Overview
TPS544C20RVFR from Texas Instruments is a PMBus-enabled, 30-A synchronous buck converter IC with integrated NexFET™ power stage, operating from 4.5 V to 18 V input and delivering 0.6 V to 5.5 V output. It features 4.5-mΩ high-side and 2.0-mΩ low-side MOSFETs, 600-mV ±0.5% reference voltage, and D-CAP2™ control mode for fast transient response in server and networking power rails.
For engineers reviewing the TPS544C20RVFR datasheet, TPS544C20RVFR pinout, TPS544C20RVFR application, or TPS544C20RVFR equivalent, this page delivers verified specifications, thermal performance data, PMBus programmability details, remote sensing implementation guidance, and validated alternative options for high-density DC-DC design.
Technical Context
The TPS544C20RVFR implements dual-mode control-D-CAP2™ (for ultra-fast load-step response with no external compensation) and D-CAP™ (for fixed-frequency operation)-selected via MODE pin. Its lossless low-side current sensing enables accurate real-time output current reporting over PMBus without sense resistors.
It integrates two on-die regulators: BP3 (3.3 V/120 mA) for controller logic and BP6 (6.5 V/120 mA) for gate drivers, both with UVLO and hysteresis. Thermal shutdown triggers at 135–155°C with 20–30°C hysteresis, and external temperature monitoring is supported via TSNS pin using a 2N3904 transistor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 30 A continuous; supports high-power CPU/GPU rails without external current sharing. |
| Input Voltage Range | 4.5 V to 18 V; compatible with 12-V intermediate bus architectures in servers and switches. |
| Output Voltage Range | 0.6 V to 5.5 V; programmable via PMBus or resistor divider on FB pin for precise core voltage regulation. |
| Switching Frequency | 250 kHz to 1000 kHz; set by RT resistor (e.g., 38.3 kΩ → 500 kHz), enabling optimization of size vs. efficiency. |
| Reference Voltage | 600 mV ±0.5% over –40°C to 125°C; ensures tight output regulation accuracy across temperature. |
| Power Stage RDS(on) | High-side: 4.5 mΩ, low-side: 2.0 mΩ at 12 V VIN; minimizes conduction loss and improves full-load efficiency. |
| PMBus Compliance | Fully compliant with PMBus 1.2; supports read/write of VOUT, IOUT, temperature, fault status, and configurable protection thresholds. |
Pinout & Package
TPS544C20RVFR uses a 40-pin LQFN package (5.0 mm × 7.0 mm, 0.5-mm pitch) with exposed thermal pad. The package supports high-current routing and efficient heat dissipation via GND-connected thermal tab.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pins 21–25) | Power stage input supply | Accepts 4.5–18 V; requires multi-ceramic bypassing to GND for EMI suppression and transient current delivery. |
| SW (Pins 8–12) | Switch node | Connects to external inductor and bootstrap capacitor; grouped pins reduce trace inductance and improve switching robustness. |
| PGOOD | Open-drain power-good indicator | Pulls low on fault (OV/UV/OT/OC); used for system sequencing and fault isolation in multi-rail supplies. |
| FB | Feedback input | Senses regulated output via resistor divider; nominal 600-mV threshold enables precise voltage setting and margining. |
| VOUTS+, VOUTS− | Differential remote sense inputs | Enable Kelvin sensing at load point for improved regulation accuracy under PCB IR drop. |
| ADDR0, ADDR1 | PMBus address configuration | Set 6-bit PMBus address via pull-down resistors; allows multiple devices on same bus without conflict. |
| RT | Frequency programming | Connects to AGND via resistor (e.g., 38.3 kΩ → 500 kHz); sets switching frequency independent of load or input. |
| MODE | Control mode selection | Connect to BP3 for D-CAP2™ (adaptive on-time), or AGND for D-CAP™ (fixed-frequency valley control). |
Key Features
| Feature | Design Value |
|---|---|
| Integrated NexFET™ power stage | Eliminates external MOSFETs and drivers; reduces BOM count and layout complexity while maintaining 30-A capability. |
| Differential remote sensing | Compensates for PCB trace resistance up to 100 Ω per leg; maintains ±0.5% output regulation at point-of-load. |
| Monotonic start-up into pre-biased output | Prevents reverse current flow during hot-insertion or rail sequencing; essential for multi-processor systems. |
| Programmable overcurrent protection | OC fault threshold adjustable from 5 A to 45 A; enables precise current limiting without hardware changes. |
| Output voltage margining and trim | ±60 mV FB adjustment range in 2-mV steps; supports production testing and dynamic voltage scaling (DVS). |
Applications
| Server CPU Core Rail | Enterprise SSD Power |
|---|---|
Use Scenario: Regulating 0.8–1.2 V at up to 30 A for modern x86 or ARM-based server CPUs with dynamic load steps exceeding 10 A/µs. IC Role / Device Role / Timing Role: Primary synchronous buck regulator with PMBus telemetry, providing real-time current/voltage feedback to BMC for thermal management. Use Value: D-CAP2™ control achieves <10 µs transient recovery; integrated current sensing eliminates sense resistor error and board space. |
Use Scenario: Delivering stable 3.3 V or 1.8 V to NVMe SSD controllers and NAND flash arrays in high-density storage enclosures. IC Role / Device Role / Timing Role: High-efficiency point-of-load converter with remote sensing to compensate for backplane voltage drop. Use Value: 92% peak efficiency at 12-V input/3.3-V output enables fanless SSD enclosure designs with <1.5 W dissipation. |
| Ethernet Switch ASIC Supply | Optical Transport Line Card |
Use Scenario: Powering 100G/400G switch ASICs requiring tightly regulated 0.9 V at 25 A with strict ripple (<10 mVpp) and fast transient response. IC Role / Device Role / Timing Role: Digitally controlled buck converter with PGOOD sequencing and fault logging via PMBus interface. Use Value: Programmable soft-start (0.6–9 ms) prevents inrush current; differential sensing maintains regulation despite 50 mV IR drop across midplane connectors. |
Use Scenario: Generating 5.0 V and 3.3 V rails for optical transceiver modules (QSFP-DD, OSFP) in telecom line cards with thermal constraints. IC Role / Device Role / Timing Role: Dual-output capable converter (with external feedback resistors) supporting multiple voltage domains from single IC footprint. Use Value: External temperature monitoring via TSNS pin enables derating based on module case temperature, extending lifetime in sealed chassis. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS544B20RVFR | 20-A rated version; identical pinout, package, and feature set but lower current capability and reduced thermal margin. | Suitable for lower-power ASICs or FPGA cores where 30-A headroom is unnecessary. | Select when total load current remains ≤22 A with 20% margin; avoids overdesign and cost premium of 30-A variant. |
| MP2960GQKT-Z | Monolithic 30-A buck with PMBus 1.3 support; higher max fSW (1.2 MHz), but lacks D-CAP2™ and differential remote sensing. | Better suited for compact, high-frequency designs where layout area is constrained more than transient performance. | Choose when prioritizing 1-MHz+ switching and smaller magnetics over sub-10-µs transient response and Kelvin sensing. |
Compared with TPS544C20RVFR, TPS544B20RVFR offers identical digital control and layout compatibility at lower current rating, while MP2960GQKT-Z trades D-CAP2™ responsiveness and remote sensing for higher-frequency operation and newer PMBus revision-making each optimal for distinct thermal, transient, or space-constrained requirements.
Availability
TPS544C20RVFR is available at Aetrix Electronics and suitable for server motherboard development, enterprise SSD power design, and optical transport equipment requiring stable component supply with full PMBus configurability and long-term industrial availability.
Supply support for TPS544C20RVFR 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 for mission-critical infrastructure.
The TPS544x20 product line was designed specifically for high-density, digitally controlled DC-DC conversion in datacenter and telecom equipment-emphasizing PMBus telemetry, fast transient response, and thermal resilience in compact LQFN packages.
FAQ
What is the maximum continuous output current rating for the TPS544C20RVFR?
The TPS544C20RVFR is rated for 30 A continuous output current under recommended operating conditions (TJ ≤ 125°C, proper PCB thermal design). This rating assumes use of the integrated 4.5-mΩ high-side and 2.0-mΩ low-side NexFET™ power stage with adequate copper pour and airflow. Derating applies above 85°C ambient or with natural convection only.
Does the TPS544C20RVFR support differential remote voltage sensing?
Yes, the TPS544C20RVFR supports true differential remote sensing via dedicated VOUTS+ and VOUTS− pins. These inputs connect to the load point through matched-impedance traces, enabling the device to regulate output voltage precisely at the point-of-load-even with up to 100 Ω of series resistance per leg-thereby compensating for PCB IR drop in high-current applications.
How is the switching frequency programmed on the TPS544C20RVFR?
The switching frequency of the TPS544C20RVFR is set by an external resistor connected between the RT pin and AGND. For example, a 38.3-kΩ resistor configures 500 kHz operation. The device supports 250 kHz to 1000 kHz range, with typical values including 300 kHz (17.8 kΩ), 650 kHz (56.2 kΩ), and 1 MHz (205 kΩ). Frequency remains stable across line, load, and temperature.
Can the TPS544C20RVFR operate without a PMBus host controller?
Yes, the TPS544C20RVFR operates autonomously without PMBus communication. Default settings-including output voltage (set by FB divider), switching frequency (RT resistor), and protection thresholds-are active at power-up. PMBus is optional for dynamic reconfiguration, telemetry, and fault logging; all critical functions remain fully operational in standalone mode.
What thermal protection features does the TPS544C20RVFR include?
The TPS544C20RVFR includes junction thermal shutdown at 135–155°C with 20–30°C hysteresis, plus programmable overtemperature warning (100–140°C) and fault (120–165°C) limits. It also supports external temperature monitoring via the TSNS pin using a 2N3904 transistor, allowing system-level thermal management beyond die temperature.
TPS544C20RVFR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SWIFT™, D-CAP™, D-CAP2™
- 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):
- 0.6V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 30A
- Frequency - Switching:
- 250kHz ~ 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-LQFN-CLIP (7x5)
TPS544C20RVFR FAQ
1.How can I place an order for TPS544C20RVFR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS544C20RVFR 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 TPS544C20RVFR reliable?
The price and inventory of TPS544C20RVFR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS544C20RVFR is usually 5 days.
3.What payment methods are accepted for TPS544C20RVFR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS544C20RVFR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS544C20RVFR?
TPS544C20RVFR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS544C20RVFR 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 TPS544C20RVFR?
For technical support, including TPS544C20RVFR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS544C20RVFR requirements.
6.How does Aetrix verify that TPS544C20RVFR is sourced from the original manufacturer or authorized distributors?
All TPS544C20RVFR 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 TPS544C20RVFR meets industry standards.
7.What is the process for return or replacement of TPS544C20RVFR?
All TPS544C20RVFR units undergo pre-shipment inspection (PSI). If there is an issue with TPS544C20RVFR, 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 TPS544C20RVFR part is unused and in its original packaging.
Return procedure for TPS544C20RVFR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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