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Texas Instruments TPS548A29RWWR
- Part No.:
- TPS548A29RWWR
- Manufacturer:
- Texas Instruments
- Package:
- 21-PowerVFQFN
- Datasheet:
-
TPS548A29RWWR.pdf
- Description:
- IC REG BUCK ADJ 15A 21VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,944
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Product details
Overview
TPS548A29RWWR from Texas Instruments is a 2.7-V to 16-V input, 15-A synchronous buck converter with differential remote sense, integrated 8.4-mΩ/2.6-mΩ MOSFETs, D-CAP3™ control, and 4.5-V internal LDO. It delivers ±1% output voltage accuracy (0.6 V–5.5 V) over –40°C to +125°C and supports hiccup current limiting for server point-of-load regulation.
For engineers reviewing the TPS548A29RWWR datasheet, TPS548A29RWWR pinout, TPS548A29RWWR application, or TPS548A29RWWR equivalent, key selection criteria include input voltage flexibility (2.7 V min with external bias), programmable switching frequency (600/800/1000 kHz), remote sensing capability, thermal shutdown at 150°C, and QFN-HR 4 mm × 3 mm package compatibility with space-constrained data center power rails.
Technical Context
The TPS548A29RWWR implements adaptive on-time D-CAP3™ control with emulated current sensing-eliminating need for external compensation while enabling stable operation with all-ceramic output capacitors. Its architecture supports both FCCM and Eco-mode™ skip operation, dynamically adjusting modulation based on load conditions.
Differential remote sense (VSNS+/VSNS−) enables precise load regulation under high-current PCB trace IR drop; the 0.6-V ±1% internal reference is trimmed across temperature and used directly by the feedback loop. Hiccup overcurrent protection triggers valley-current limiting via RTRIP resistor, with fault recovery requiring EN toggle or VIN cycle.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7 V–16 V (with external 4.75–5.3 V VCC bias); 3.0 V–16 V (internal LDO only) |
| Output Current | 15 A continuous (2.7–16 V input, external VCC bias); 12 A (3–16 V, internal LDO) |
| Output Voltage Range | 0.6 V–5.5 V set via FB resistor divider; ±1% reference accuracy over –40°C to +125°C |
| Switching Frequency | 600 kHz / 800 kHz / 1 MHz (pin-selectable via MODE-to-AGND resistor) |
| Integrated Power Stage | 8.4-mΩ high-side + 2.6-mΩ low-side MOSFETs; supports >90% efficiency at 12 VIN/1.2 VOUT/10 A |
| Protection Features | Hiccup OCL (valley-current limit), OVP/UVP (116%/80% thresholds), thermal shutdown (150°C), UVLO on VIN & VCC |
| Package | VQFN-HR (RWW), 4.0 mm × 3.0 mm, 21-pin, exposed thermal pad |
Pinout & Package
VQFN-HR (RWW) 4.0 mm × 3.0 mm, 21-pin package with exposed thermal pad; optimized for high-density server PCB layouts and thermal performance (RθJA = 49.5°C/W, RθJB = 11.2°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (BOOT) | High-side gate driver boost supply | Connect bootstrap capacitor between BOOT and SW; critical for HS FET turn-on in synchronous buck topology |
| 3 (TRIP) | Valley current limit programming | Resistor to AGND sets OCL threshold (4.0–14.7 kΩ → 14.8–21.7 A); ±1% tolerance recommended |
| 4 (MODE) | Frequency & operating mode select | Resistor to AGND selects 600/800/1000 kHz and FCCM vs Eco-mode; determines transient response profile |
| 5 (SS/REFIN) | Soft-start timing / external reference input | Capacitor to VSNS− sets soft-start time (min 1.5 ms); external DC voltage overrides internal 0.6-V reference for tracking |
| 6 (VSNS−) | Remote sense return / reference ground | Connect to load ground for differential sensing; short to AGND for single-ended configuration |
| 7 (FB) | Feedback input | Resistor divider from VOUT to VSNS− sets output voltage; 1–40 nA leakage ensures precision |
| 8 (EN) | Enable control | Logic-high >1.22 V enables converter; internal 6.5-MΩ pull-down allows default-disable operation |
| 9 (PGOOD) | Open-drain power-good status | Asserts high after 1.4 ms startup delay when FB is within ±7.5% of target; sinks 10 mA max |
| 10,21 (VIN) | Main input power supply | Dual VIN pins reduce parasitic inductance; decouple each to PGND with ≥2× 10-µF ceramic caps near package |
| 11–18 (PGND) | Power ground return | Eight PGND pins minimize conduction loss and thermal resistance; ≥6 vias per pin required for thermal relief |
| 19 (VCC) | Internal 4.5-V LDO output / external bias input | Bypass with 2.2-µF ceramic cap; external 4.75–5.3 V bias improves efficiency by bypassing LDO losses |
| 20 (SW) | Power switch node | Connect to output inductor; high di/dt node requiring tight layout and Kelvin connection to PGND |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP3™ adaptive on-time control | Enables ultra-fast load-step response without external compensation; supports all-ceramic output capacitors |
| Differential remote sensing | Compensates for PCB trace IR drop up to ±50 mV on VSNS−; maintains ±1% output regulation at point-of-load |
| Programmable hiccup overcurrent protection | RTRIP resistor sets valley-current limit (14.8–21.7 A); hiccup mode prevents thermal runaway during sustained overload |
| Auto-skip Eco-mode™ | Improves light-load efficiency by disabling switching cycles below ~1 A; reduces IQ to 680 µA at 12 VIN |
| Prebiased startup capability | Allows safe start-up into precharged output rail without reverse current flow through low-side FET |
| Pin-compatible with TPS54JA20 | Enables drop-in upgrade path from 12-A to 15-A design without PCB revision; identical RWW footprint and pinout |
Applications
| Rack Server Point-of-Load | Data Center Switch ASIC Supply |
|---|---|
|
Use Scenario: Regulating 0.8 V/12 A core voltage for dual-socket Xeon SP processors in 1U rack servers. IC Role / Device Role / Timing Role: Primary synchronous buck regulator with remote sense correcting for 15-mΩ board trace resistance. Use Value: Maintains ±1% output accuracy across –40°C to +125°C junction temperature while delivering 15-A peak current during CPU turbo bursts. |
Use Scenario: Powering 1.2 V/10 A SerDes lanes on 100-GbE line cards with strict ripple and transient requirements. IC Role / Device Role / Timing Role: High-bandwidth D-CAP3™ buck converter with 800-kHz switching and sub-100-ns PGOOD assertion. Use Value: Achieves <500-ns load-step response and <15-mV undershoot at 6-A/µs slew rate, meeting IEEE 802.3bj jitter specs. |
| Hardware Accelerator Card | Industrial PC CPU Core Rail |
|
Use Scenario: Delivering 0.75 V/14 A to FPGA-based AI inference accelerators with dynamic voltage scaling. IC Role / Device Role / Timing Role: Programmable VOUT tracking device using SS/REFIN as external reference input. Use Value: Supports seamless voltage transitions between 0.75 V and 0.85 V states with <2-ms soft-start and no output overshoot. |
Use Scenario: Providing robust 1.05 V/8 A core supply for Intel Atom x6000E processors in fanless industrial PCs. IC Role / Device Role / Timing Role: Thermally resilient buck converter with 150°C thermal shutdown and 49.5°C/W RθJA. Use Value: Sustains full 8-A load at 70°C ambient with natural convection cooling, eliminating need for forced airflow. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54JA20RWW | 12-A rated; identical RWW package, pinout, and feature set except lower current capability and no external VCC bias support | Suitable for designs where peak load ≤12 A and thermal margin is sufficient without external bias | Select TPS54JA20RWW only if 15-A headroom and 2.7-V input operation are unnecessary; not a drop-in replacement for full TPS548A29RWWR specs |
| MP2964GQKT-Z | Monolithic 16-A buck with PMBus interface; requires external compensation; no D-CAP3™ or remote sense | Used where digital telemetry, margining, and sequencing are required-e.g., telecom shelf management | Choose MP2964GQKT-Z only when I²C/PMBus control and telemetry outweigh analog simplicity and remote-sense precision of TPS548A29RWWR |
Compared with TPS54JA20RWW, the TPS548A29RWWR adds 25% current headroom, 0.3-V lower VIN minimum with external bias, and remote sensing-critical for high-accuracy server rails. Versus MP2964GQKT-Z, it trades digital control for faster transient response, zero-compensation design, and tighter analog regulation without firmware dependency.
Availability
TPS548A29RWWR is available at Aetrix Electronics and suitable for rack servers, data center switches, and industrial PC power supplies requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for TPS548A29RWWR 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 high-efficiency power management ICs.
The TPS548A29RWWR belongs to TI's D-CAP3™ synchronous buck converter family, engineered specifically for high-density, high-current point-of-load regulation in data center and enterprise computing infrastructure.
FAQ
What input voltage range does the TPS548A29RWWR support with and without external VCC bias?
The TPS548A29RWWR supports 2.7 V–16 V input when an external 4.75–5.3 V bias is applied to the VCC pin, enabling operation down to 2.7 V. With only the internal 4.5-V LDO active, the minimum input is 3.0 V–16 V. This dual-input capability allows flexible system-level power sequencing and extends usability in low-voltage battery-backed or intermediate-bus architectures. The TPS548A29RWWR datasheet specifies absolute maximum ratings up to 18 V on VIN.
How is output voltage accuracy maintained across temperature with the TPS548A29RWWR?
The TPS548A29RWWR uses a trimmed 0.6-V internal reference with ±1% tolerance over –40°C to +125°C junction temperature, directly feeding the feedback comparator. Differential remote sensing (VSNS+/VSNS−) further compensates for PCB trace voltage drop, ensuring ±1% regulation at the load-not just at the FB node. This combination enables precision core-rail regulation in thermally demanding environments like server CPUs. The TPS548A29RWWR achieves this without trimming resistors or calibration firmware.
Can the TPS548A29RWWR be used with all-ceramic output capacitors?
Yes-the TPS548A29RWWR's D-CAP3™ control architecture is explicitly designed for stability with low-ESR ceramic capacitors, eliminating the need for electrolytic or polymer types. Its emulated current sensing and adaptive on-time modulation provide inherent phase-margin robustness across capacitor ESR ranges from 0.5 mΩ to 10 mΩ. This simplifies BOM, reduces footprint, and improves reliability versus traditional voltage-mode or current-mode controllers requiring external compensation. The TPS548A29RWWR evaluation module validates operation with 3× 22-µF 0805 X7R ceramics.
What is the purpose of the TRIP pin on the TPS548A29RWWR, and how is it configured?
TRIP is the valley-current limit programming pin: connecting a resistor from TRIP to AGND sets the overcurrent threshold via KOCL = 60,000 A·Ω. For example, a 4.02-kΩ resistor yields 14.8 A nominal limit. The TPS548A29RWWR enters hiccup mode upon trip-latching off only for overvoltage faults, but cycling on/off for overcurrent or undervoltage. This protects MOSFETs and inductors during sustained overload while allowing automatic recovery. The TPS548A29RWWR datasheet specifies RTRIP tolerance impact on KOCL accuracy across resistor values.
Is the TPS548A29RWWR pin-compatible with other TI buck converters?
Yes-the TPS548A29RWWR shares the same 21-pin VQFN-HR (RWW) package and identical pinout with the 12-A TPS54JA20RWW, enabling direct PCB footprint reuse. All signal, power, and ground assignments match exactly, including VIN, PGND, BOOT, SW, and VCC locations. However, the TPS548A29RWWR adds support for external VCC bias and extends current capability, so upgrading requires verifying thermal margin and input capacitor sizing. The TPS548A29RWWR is not compatible with non-RWW packages like RT or RHL.
TPS548A29RWWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 21-PowerVFQFN
- 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):
- 0.6V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 15A
- Frequency - Switching:
- 600kHz, 800kHz, 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 21-VQFN-HR (4x3)
TPS548A29RWWR FAQ
1.How can I place an order for TPS548A29RWWR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS548A29RWWR 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 TPS548A29RWWR reliable?
The price and inventory of TPS548A29RWWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS548A29RWWR is usually 5 days.
3.What payment methods are accepted for TPS548A29RWWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS548A29RWWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS548A29RWWR?
TPS548A29RWWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS548A29RWWR 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 TPS548A29RWWR?
For technical support, including TPS548A29RWWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS548A29RWWR requirements.
6.How does Aetrix verify that TPS548A29RWWR is sourced from the original manufacturer or authorized distributors?
All TPS548A29RWWR 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 TPS548A29RWWR meets industry standards.
7.What is the process for return or replacement of TPS548A29RWWR?
All TPS548A29RWWR units undergo pre-shipment inspection (PSI). If there is an issue with TPS548A29RWWR, 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 TPS548A29RWWR part is unused and in its original packaging.
Return procedure for TPS548A29RWWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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