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Texas Instruments TPS548C26RXXR
- Part No.:
- TPS548C26RXXR
- Manufacturer:
- Texas Instruments
- Package:
- 37-PowerWFQFN
- Datasheet:
-
TPS548C26RXXR.pdf
- Description:
- IC REG BUCK ADJ 35A 37WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,675
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Product details
Overview
TPS548C26RXXR from Texas Instruments is a 4-V to 16-V input, 35-A synchronous buck converter with D-CAP+™ control topology, integrated 4.0-mΩ high-side and 1.0-mΩ low-side MOSFETs, differential remote sense (VOSNS/GOSNS), and ±0.5% output voltage tolerance over 0°C–85°C. It delivers fast transient response for server point-of-load (POL) rails requiring tight regulation under dynamic load steps.
For engineers reviewing the TPS548C26RXXR datasheet, TPS548C26RXXR pinout, TPS548C26RXXR application, or TPS548C26RXXR equivalent, key selection criteria include its 37-pin WQFN-FCRLF package, selectable 0.6–1.2 MHz switching frequency, programmable soft-start (1–8 ms), valley current limit configuration via ILIM resistor, and support for external 5-V bias on VCC/VDRV to enable 2.7-V minimum input operation.
Technical Context
The TPS548C26RXXR implements D-CAP+™ adaptive on-time control with no external compensation required, enabling stable operation with all-ceramic output capacitors. Its differential remote sensing uses dedicated VOSNS and GOSNS pins to reject PCB trace IR drop, achieving ±0.5% accuracy at the load.
Internal power stage integration includes matched high- and low-side MOSFETs with verified RDS(on) of 4.0 mΩ (HS) and 1.0 mΩ (LS) at 25°C, supporting continuous 35-A output. Protection features include selectable hiccup/latch-off response for overcurrent, overvoltage, undervoltage, and thermal faults, with precise thresholds defined across –40°C to 125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.0 V to 16 V (supports 2.7 V min with external 5-V bias on VCC/VDRV) |
| Output Current | 35 A continuous (verified with integrated MOSFETs and thermal design) |
| Output Voltage Accuracy | ±0.5% from 0°C to 85°C TJ (enables precision CPU/GPU core rail regulation) |
| Switching Frequency | 0.6 MHz to 1.2 MHz (pin-selectable via MODE resistor; FCCM/DCM modes) |
| Soft-Start Time | 1 ms to 8 ms (programmable via SS pin resistor to AGND) |
| Remote Sense Accuracy | True differential sensing (VOSNS/GOSNS) rejects up to 50 mV PCB IR drop |
| Thermal Shutdown | 153°C to 166°C junction threshold with 30°C hysteresis (analog OTP) |
Pinout & Package
TPS548C26RXXR is housed in a 5.0 mm × 6.0 mm, 37-pin WQFN-FCRLF package with exposed thermal pad (bottom-side PGND connection). The package supports high-current routing via multiple SW, PVIN, and PGND pins and integrates flip-chip die attach for low-inductance power delivery.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ILIM (Pin 1) | Overcurrent limit selection | Resistor-to-AGND sets valley current limit threshold (12 A to 39 A range) |
| MODE (Pin 36) | Frequency and mode control | Resistor-to-AGND selects 0.6–1.2 MHz switching frequency and FCCM/DCM operation |
| SS (Pin 29) | Soft-start and compensation | Resistor-to-AGND programs soft-start time (1–8 ms) and internal loop compensation |
| VOSNS (Pin 28) | Differential output voltage sense (+) | Direct connection to VOUT sense point enables accurate on-time generation and line/load regulation |
| GOSNS (Pin 31) | Differential output voltage sense (–) | Connects to load-side ground reference to reject PCB trace resistance error |
| PG (Pin 2) | Power-good indicator | Open-drain output asserts when VOUT reaches regulation; requires external pullup |
| SW (Pins 11–18) | Switch node | Eight paralleled pins reduce conduction loss and thermal stress for 35-A output |
| PVIN (Pins 20–24) | Main power input | Five pins share input current path and minimize trace inductance for high di/dt operation |
| PGND (Pins 7–10, 19) | Power ground return | Nine pins provide low-impedance return path for high-frequency switching currents |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP+™ control topology | Eliminates external compensation components while maintaining stability with all-ceramic output caps |
| Integrated 4.0-mΩ / 1.0-mΩ MOSFETs | Enables 35-A continuous operation without external FETs or gate drivers |
| Differential remote sense (VOSNS/GOSNS) | Compensates for up to 50 mV IR drop between IC and load, preserving ±0.5% regulation accuracy |
| External 5-V bias support (VCC/VDRV) | Reduces power loss in internal LDO, enabling 2.7-V minimum input and higher efficiency at light loads |
| Selectable hiccup or latch-off fault response | Allows system-level fault handling strategy alignment-hiccup for self-recovery, latch-off for safety-critical shutdown |
Applications
| Server Point-of-Load (POL) | Hardware Accelerator Power |
|---|---|
Use Scenario: Regulating 1.1-V core voltage for high-performance CPUs and ASICs in rack-mounted servers with rapid load transients up to 100 A/µs. IC Role / Device Role / Timing Role: Primary POL regulator with D-CAP+™ adaptive on-time control delivering sub-100-ns transient response and ±0.5% DC accuracy. Use Value: Maintains processor stability during burst workloads by rejecting PCB IR drop via differential sensing and sustaining regulation under 35-A steady-state current. |
Use Scenario: Supplying 0.8–1.2-V rails to AI inference accelerators (e.g., FPGAs, TPUs) with tight voltage margins and high current density requirements. IC Role / Device Role / Timing Role: High-current buck converter with integrated MOSFETs and programmable soft-start to prevent inrush damage during FPGA configuration. Use Value: Enables single-chip 35-A solution with minimal external components, reducing board area by >30% versus discrete controller + DrMOS designs. |
| Data Center Switch ASIC Power | Cloud Infrastructure Memory Subsystem |
Use Scenario: Delivering 1.8-V or 3.3-V auxiliary rails to packet processing ASICs in top-of-rack switches operating at ambient temperatures up to 85°C. IC Role / Device Role / Timing Role: Thermally robust POL converter using bottom-side thermal pad and multiple PGND pins for efficient heat dissipation in confined airflow environments. Use Value: Achieves 92% peak efficiency at 12-V input/1.1-V output with external 5-V bias, lowering thermal load in densely packed switch line cards. |
Use Scenario: Powering DDR5 memory modules requiring tightly regulated 1.1-V VDD/VDDQ rails with fast transient recovery to prevent data corruption during burst reads/writes. IC Role / Device Role / Timing Role: Differential-sense buck regulator with ±0.5% accuracy and 1-ms soft-start to meet JEDEC DDR5 power sequencing requirements. Use Value: Eliminates need for external sense resistors or op-amp compensation networks, simplifying layout and improving signal integrity near high-speed memory interfaces. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS546C23RXXR | Lower 25-A rating; identical 37-pin WQFN-FCRLF package and D-CAP+™ control; lacks external 5-V bias support on VDRV | Suitable for lower-current server POLs where 35-A headroom is unnecessary; no VDRV bias option limits minimum input to 4.0 V | Choose when cost sensitivity outweighs need for 35-A capacity or 2.7-V operation. |
| MP2965GQKT-Z | 35-A rating with PMBus interface; different 5×6 mm QFN-39 package; requires external compensation; no differential remote sense | Preferred for systems needing digital telemetry (voltage/current/temp monitoring) and programmable fault responses via PMBus | Choose when digital control, telemetry, and configurability are prioritized over analog simplicity and differential sensing accuracy. |
Compared with TPS548C26RXXR, TPS546C23RXXR offers pin-compatible scaling down to 25 A without external bias capability, while MP2965GQKT-Z trades analog simplicity for digital configurability and telemetry-but lacks true differential remote sensing critical for sub-1% load regulation.
Availability
TPS548C26RXXR is available at Aetrix Electronics and suitable for server point-of-load (POL), hardware accelerator power, and data center switch ASIC applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for TPS548C26RXXR 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 decades of expertise in high-efficiency DC/DC conversion for enterprise infrastructure.
The TPS548C26RXXR belongs to TI's high-current, high-density buck converter product line designed specifically for space-constrained, thermally demanding data center and cloud computing power delivery applications.
FAQ
What is the minimum input voltage supported by the TPS548C26RXXR?
The TPS548C26RXXR supports a minimum input voltage of 2.7 V when an external 5-V bias is applied to both VCC and VDRV pins. Without external bias-i.e., relying solely on the internal VCC LDO-the minimum input is 4.0 V. This dual-mode operation allows flexibility in low-voltage battery-backed or intermediate bus architectures while maintaining full 35-A capability.
How does the differential remote sense function work on the TPS548C26RXXR?
The TPS548C26RXXR uses dedicated VOSNS (positive) and GOSNS (negative) pins to measure output voltage directly at the load, rejecting voltage drop across PCB traces and interconnects. This true differential sensing enables ±0.5% output accuracy over temperature and load, critical for CPU/GPU core rails where even 10 mV error can impact timing margins or thermal throttling behavior.
Can the TPS548C26RXXR operate without external compensation components?
Yes. The TPS548C26RXXR implements D-CAP+™ control topology, which eliminates the need for external loop compensation components. Internal compensation is selected via the SS pin resistor, and stability is guaranteed across all ceramic output capacitor values and ESR ranges-simplifying design, reducing BOM count, and improving layout robustness in high-density server boards.
What protection features are implemented in the TPS548C26RXXR?
The TPS548C26RXXR includes overcurrent (valley and negative), overvoltage, undervoltage, and overtemperature protections. Fault response is user-selectable via pin strapping: hiccup mode enables automatic recovery after fault clearance, while latch-off mode holds shutdown until EN is cycled-supporting both self-healing and fail-safe system architectures depending on safety requirements.
Is the TPS548C26RXXR RoHS compliant and lead-free?
Yes. The TPS548C26RXXR is a lead-free device and fully RoHS compliant without exemption. It meets EU Directive 2011/65/EU requirements and is qualified for use in environmentally regulated data center and telecommunications equipment where hazardous substance restrictions apply.
TPS548C26RXXR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 37-PowerWFQFN
- 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):
- 2.7V
- Voltage - Input (Max):
- 16V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 35A
- Frequency - Switching:
- 600kHz, 800kHz, 1MHz, 1.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 37-WQFN-FCRLF (5x6)
TPS548C26RXXR FAQ
1.How can I place an order for TPS548C26RXXR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS548C26RXXR 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 TPS548C26RXXR reliable?
The price and inventory of TPS548C26RXXR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS548C26RXXR is usually 5 days.
3.What payment methods are accepted for TPS548C26RXXR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS548C26RXXR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS548C26RXXR?
TPS548C26RXXR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS548C26RXXR 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 TPS548C26RXXR?
For technical support, including TPS548C26RXXR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS548C26RXXR requirements.
6.How does Aetrix verify that TPS548C26RXXR is sourced from the original manufacturer or authorized distributors?
All TPS548C26RXXR 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 TPS548C26RXXR meets industry standards.
7.What is the process for return or replacement of TPS548C26RXXR?
All TPS548C26RXXR units undergo pre-shipment inspection (PSI). If there is an issue with TPS548C26RXXR, 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 TPS548C26RXXR part is unused and in its original packaging.
Return procedure for TPS548C26RXXR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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