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Texas Instruments TPS54672PWPR
- Part No.:
- TPS54672PWPR
- Manufacturer:
- Texas Instruments
- Package:
- 28-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS54672PWPR.pdf
- Description:
- IC REG BUCK 6A 28HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,098
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Product details
Overview
TPS54672PWPR from Texas Instruments is a synchronous PWM bus termination regulator IC designed for DDR memory and GTL/STL active termination. It delivers ±6 A continuous output current with 30-mΩ high- and low-side MOSFETs, supports 3 V to 6 V input, tracks external reference voltage (0.2 V–1.75 V), and operates at fixed 350 kHz or adjustable 280–700 kHz switching frequency.
For engineers reviewing the TPS54672PWPR datasheet, TPS54672PWPR pinout, TPS54672PWPR application, or TPS54672PWPR equivalent, this device is selected for precision point-of-load regulation in high-speed logic interfaces where fast load transient response, bidirectional current capability, and tight tracking accuracy (±1.5%) are critical design requirements.
Technical Context
The TPS54672PWPR integrates dual N-channel MOSFETs (30 mΩ rDS(on) typ. at 6 V VIN), adaptive dead-time control, and a high-bandwidth (5 MHz) error amplifier with rail-to-rail input range and 1.5 mV max offset. Its PWM control loop uses cycle-by-cycle peak current limiting with 100 ns leading-edge blanking and thermal shutdown at 150°C.
It features separate analog (AGND) and power (PGND) ground domains, internal VBIAS regulator (2.8 V ±0.1 V), and open-drain STATUS output asserting low during UVLO, thermal shutdown, or VBIAS undervoltage. The REFIN input enables precise tracking of external DAC or system reference voltages across −6 A to +6 A output range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0 V to 6.0 V - Supports DDR VDDQ rails and intermediate bus voltages without external LDO pre-regulation. |
| Continuous Output Current | ±6 A - Enables active termination of DDR/GTL buses requiring bidirectional sourcing and sinking. |
| Switching Frequency | Fixed 350 kHz or 280–700 kHz adjustable via RT resistor - Balances efficiency, size, and EMI for compact PCB layouts. |
| Tracking Accuracy | ±1.5% over −6 A to +6 A load - Ensures stable termination voltage matching reference under dynamic load conditions. |
| MOSFET rDS(on) | 30 mΩ (high- and low-side, typ. at VIN = 6 V) - Minimizes conduction loss and thermal rise at full 6 A output. |
| UVLO Threshold | 2.95 V start / 2.80 V stop with 0.16 V hysteresis - Prevents erratic startup during brownout while rejecting VIN noise. |
| Error Amplifier GBW | 5 MHz - Enables stable compensation with wide-range output filter components (e.g., 0.56 µH inductor). |
Pinout & Package
TPS54672PWPR is housed in a thermally enhanced 28-pin HTSSOP (PWP) PowerPAD™ package (6.4 mm × 9.7 mm), with exposed thermal pad soldered to AGND plane for efficient heat dissipation. Pin count and layout match TI's SWIFT™ family for consistent PCB footprint reuse.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AGND (Pin 1) | Analog ground reference | Return for COMP, REFIN, VBIAS, and RT; must be isolated from PGND except at single-point connection to minimize noise coupling. |
| VSENSE (Pin 2) | Error amplifier inverting input | Connects to output voltage divider; senses regulated VTTQ for closed-loop tracking control. |
| COMP (Pin 3) | Error amplifier output | Drives external Type 2/3 compensation network; 1.4 V/µs slew rate supports fast transient recovery. |
| STATUS (Pin 4) | Open-drain fault indicator | Asserts low during UVLO, thermal shutdown, or VBIAS undervoltage; used for system power sequencing and monitoring. |
| BOOT (Pin 5) | Bootstrap supply node | Drives high-side MOSFET gate via external 0.022–0.1 µF ceramic capacitor; requires low-ESR placement adjacent to PH pins. |
| PH (Pins 6–14) | Phase node | High-current switching junction of internal MOSFETs; connects directly to output inductor with minimal trace length to reduce EMI. |
| RT (Pin 28) | Oscillator frequency set | Resistor to AGND sets frequency (280–700 kHz); floating defaults to 350 kHz - no external component required for basic operation. |
| ENA (Pin 27) | Enable control input | Logic-compatible enable (1.4 V min high, 0.82 V max low); initiates slow-start (0.25 V/ms) on rising edge. |
| REFIN (Pin 26) | External reference input | High-impedance (≤250 nA bias) input for tracking DAC outputs or system references; supports 0.2–1.75 V range. |
| VBIAS (Pin 25) | Internal bias regulator output | 2.8 V ±0.1 V supply for internal circuitry; bypassed with 0.1–1.0 µF X5R/X7R ceramic to AGND. |
| VIN (Pins 20–24) | Main power input | Accepts 3–6 V input; multiple pins reduce IR drop and improve current sharing into internal regulators and MOSFET drivers. |
| PGND (Pins 15–19) | Power ground return | High-current return path for low-side MOSFET and input/output capacitors; routed separately from AGND to avoid ground bounce. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional ±6 A output capability | Enables active termination of DDR/GTL buses without external sink FETs, reducing BOM count and board area. |
| Integrated 30-mΩ high- and low-side MOSFETs | Eliminates discrete power stage, improves thermal performance, and simplifies layout versus controller+external FET solutions. |
| Adaptive dead-time control | Prevents shoot-through by dynamically aligning high-/low-side gate drive timing based on PH node voltage transitions. |
| True rail-to-rail error amplifier input | Supports 0% duty cycle during transients and enables accurate regulation down to 0.84 V output (limited by min ON time). |
| Separate AGND/PGND domains | Reduces noise coupling between sensitive analog circuits and high di/dt power paths, preserving regulation stability at 6 A. |
Applications
| DDR Memory Termination | Active GTL Bus Termination |
|---|---|
Use Scenario: Regulating VTT voltage for DDR2/DDR3 memory modules with dynamic load currents up to ±6 A during read/write bursts. IC Role / Device Role / Timing Role: Precision tracking regulator sourcing/sinking current to maintain termination voltage within ±1.5% of reference during fast load steps. Use Value: Eliminates need for external current-sink FET and reduces termination circuit footprint by >40% versus discrete solutions. |
Use Scenario: Providing matched termination voltage for high-speed GTL+ or GTL buses in telecom backplanes and test equipment. IC Role / Device Role / Timing Role: Active bus terminator maintaining constant VTT despite rapid signal edge rates and bidirectional data flow. Use Value: Achieves <10 µs load transient response (50 mV/div AC-coupled) and supports 700 kHz switching for compact filter design. |
| DAC-Controlled High-Current Stage | Precision Point-of-Load Supply |
Use Scenario: Generating programmable termination voltage using a DAC output as REFIN in FPGA I/O bank power systems. IC Role / Device Role / Timing Role: Tracking regulator interpreting DAC voltage (0.2–1.75 V) as target VTT, with sub-mV offset error amplifier enabling tight DAC-to-VTT mapping. Use Value: Enables software-configurable termination without hardware changes; REFIN bias current ≤250 nA minimizes DAC loading error. |
Use Scenario: Delivering tightly regulated, low-noise power to high-performance ADCs, PLLs, or RF front-ends requiring stable reference voltage rails. IC Role / Device Role / Timing Role: Low-noise, high-PSRR point-of-load converter with 5 MHz error amplifier bandwidth and dedicated AGND domain isolating analog feedback path. Use Value: Maintains ±1.5% regulation accuracy across full −6 A to +6 A load range, critical for metrology-grade signal chain integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar active bus termination applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54673PWPR | Disables sink current during startup to prevent undershoot; otherwise identical pinout, specs, and package. | Better suited for systems where output voltage overshoot during enable is unacceptable (e.g., memory initialization sequences). | Select TPS54673PWPR when controlled startup sink behavior is required; TPS54672PWPR remains optimal for general-purpose DDR/GTL termination. |
| TPS54610PWP | Adjustable-output buck controller (no integrated FETs); requires external high-/low-side MOSFETs and external compensation. | Offers higher VIN range (up to 15 V) and flexibility in MOSFET selection but increases BOM count, layout complexity, and thermal design effort. | Choose TPS54610PWP only if input voltage exceeds 6 V or if custom MOSFETs are needed for specialized thermal or efficiency targets. |
Compared with TPS54673PWPR, TPS54672PWPR provides full bidirectional current capability from power-up, while TPS54610PWP trades integration for design flexibility-neither offers the same combination of ±6 A tracking, integrated FETs, and PWP package thermal performance as TPS54672PWPR.
Availability
TPS54672PWPR is available at Aetrix Electronics and suitable for DDR memory termination, active GTL bus designs, and precision point-of-load power supplies requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for TPS54672PWPR 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.
The TPS54672PWPR belongs to TI's SWIFT™ family of integrated synchronous buck regulators, engineered specifically for high-current, high-accuracy active termination and point-of-load applications in memory subsystems and high-speed digital interfaces.
FAQ
What is the maximum continuous output current capability of the TPS54672PWPR?
The TPS54672PWPR delivers ±6 A continuous output current - meaning it can source up to 6 A and sink up to 6 A independently. This bidirectional capability is essential for DDR memory termination where current flows both into and out of the VTT rail during data transitions. The device achieves this using matched 30-mΩ high- and low-side N-channel MOSFETs optimized for low conduction loss at full load.
Does the TPS54672PWPR support external frequency adjustment, and how is it configured?
Yes, the TPS54672PWPR supports externally adjustable switching frequency from 280 kHz to 700 kHz using a resistor connected between the RT pin (Pin 28) and AGND. A 71.5-kΩ resistor sets 700 kHz; values from 68 kΩ to 180 kΩ are supported. Leaving RT floating selects the default 350 kHz internal oscillator. This flexibility allows designers to optimize for efficiency, EMI, or component size without changing the TPS54672PWPR footprint.
How does the TPS54672PWPR handle thermal management at full load?
The TPS54672PWPR uses a thermally enhanced 28-pin HTSSOP (PWP) package with an exposed PowerPAD™ that must be soldered to a dedicated AGND copper plane. With proper layout - including ≥12 thermal vias (8×0.013″ under pad, 4×0.018″ under package) and ≥3″×3″ 1-oz copper area - it sustains 6 A continuous operation at 85°C ambient. Thermal shutdown activates at 150°C junction temperature with 10°C hysteresis to prevent cycling.
Can the TPS54672PWPR track a DAC output as its reference voltage?
Yes, the TPS54672PWPR accepts an external reference voltage on the REFIN pin (Pin 26) ranging from 0.2 V to 1.75 V with ≤250 nA input bias current. This makes it ideal for DAC-controlled termination, where the DAC output directly sets VTT. The error amplifier's rail-to-rail input range and 1.5 mV max offset ensure accurate tracking even at low reference voltages, and the REFIN path is isolated from noisy power domains via dedicated AGND routing.
What protection features are integrated into the TPS54672PWPR?
The TPS54672PWPR integrates cycle-by-cycle peak current limiting (7–12 A trip threshold depending on VIN), thermal shutdown (150°C), undervoltage lockout (2.95 V start / 2.80 V stop), and open-drain STATUS output that asserts low during any fault condition. It also includes adaptive dead-time control to prevent shoot-through, 100 ns leading-edge blanking to reject turn-on spikes, and slow-start (0.25 V/ms) to limit inrush current - all without external components.
TPS54672PWPR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SWIFT™
- Package/Case:
- 28-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- -
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- 6A
- Frequency - Switching:
- 350kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-HTSSOP
TPS54672PWPR FAQ
1.How can I place an order for TPS54672PWPR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54672PWPR 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 TPS54672PWPR reliable?
The price and inventory of TPS54672PWPR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54672PWPR is usually 5 days.
3.What payment methods are accepted for TPS54672PWPR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54672PWPR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54672PWPR?
TPS54672PWPR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54672PWPR 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 TPS54672PWPR?
For technical support, including TPS54672PWPR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54672PWPR requirements.
6.How does Aetrix verify that TPS54672PWPR is sourced from the original manufacturer or authorized distributors?
All TPS54672PWPR 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 TPS54672PWPR meets industry standards.
7.What is the process for return or replacement of TPS54672PWPR?
All TPS54672PWPR units undergo pre-shipment inspection (PSI). If there is an issue with TPS54672PWPR, 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 TPS54672PWPR part is unused and in its original packaging.
Return procedure for TPS54672PWPR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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