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Texas Instruments TPS62871Z4WRXSR
- Part No.:
- TPS62871Z4WRXSR
- Manufacturer:
- Texas Instruments
- Package:
- 16-TFQFN Exposed Pad
- Datasheet:
-
TPS62871Z4WRXSR.pdf
- Description:
- IC REG BUCK PROG 9A 16VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
TPS62871Z4WRXSR from Texas Instruments is a 9A synchronous step-down DC/DC converter with I²C interface, differential remote sensing, and stackable architecture for FPGA, ASIC, and DDR core power delivery. It operates from 2.7V to 6V input, delivers ±1% output voltage accuracy, supports 2.25MHz switching (resistor-selectable), and integrates 7mΩ/4.5mΩ MOSFETs in a 2.55mm × 3.55mm VQFN-FCRLF (RXS) package.
For engineers reviewing the TPS62871Z4WRXSR datasheet, TPS62871Z4WRXSR pinout, TPS62871Z4WRXSR application, or TPS62871Z4WRXSR equivalent, this device enables high-accuracy point-of-load regulation in space-constrained, thermally demanding applications such as optical network processors and multi-core SoCs requiring fast transient response and I²C-configurable voltage scaling.
Technical Context
The TPS62871Z4WRXSR implements a fixed-frequency DCS-Control topology with inner emulated current loop, direct feedback path, and outer voltage-regulating loop - enabling sub-10µs load transient recovery while maintaining low output ripple. Its differential remote sensing (VOSNS/GOSNS) compensates for PCB IR drop, ensuring ±1% DC accuracy at the load under all conditions.
It supports dual operating modes: forced-PWM for minimal ripple and best transient performance, or power-save mode for peak efficiency at light loads. The I²C interface (up to 1MHz) enables real-time voltage adjustment, temperature monitoring, thermal warning, and power-good status reporting - critical for dynamic voltage scaling in adaptive computing systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 9A continuous - supports high-power digital cores without external current sharing circuitry |
| Input Voltage Range | 2.7V to 6V - compatible with common intermediate bus rails (3.3V, 5V) and battery-backed supplies |
| Output Voltage Accuracy | ±1% - guaranteed across line, load, and temperature (–40°C to 125°C TJ) with remote sense |
| Switching Frequency | 2.25MHz (default via FSEL) - enables compact 110–330nH inductors and reduces EMI fundamental frequency |
| I²C Interface Speed | Up to 1MHz - allows rapid voltage reconfiguration during processor DVFS transitions |
| Thermal Protection | 150°C thermal warning + 170°C shutdown with 20°C hysteresis - prevents sustained overtemperature operation |
| Package | RXS (VQFN-FCRLF, 16-pin, 2.55mm × 3.55mm × 1mm) with wettable flanks - supports automated optical inspection (AOI) and reliable solder joint formation |
Pinout & Package
RXS package: 16-pin VQFN-FCRLF (2.55mm × 3.55mm × 1mm) with exposed thermal pad soldered to GND for optimal thermal performance (RθJA = 28°C/W on EVM).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| COMP | Control loop compensation node | Connects external RC network to GOSNS for stability tuning; shared across stacked devices |
| GOSNS / VOSNS | Differential output voltage sense inputs | Enable point-of-load regulation; reject PCB trace resistance error up to ±100mV common-mode range |
| EN | Enable control input | Active-high with internal pulldown; requires ≥15kΩ series resistor to prevent floating |
| MODE/SYNC | Operating mode select & sync input | Pull low for power-save mode; pull high or drive external clock (1.3–3.3MHz) for forced-PWM or synchronization |
| SDA / SCL | I²C bidirectional data & clock | Open-drain with internal weak pullups; require external 2.2–10kΩ pullups to VIO (1.65–5.5V) |
| VSEL / FSEL | Startup voltage & frequency select | Resistor-programmable: VSEL sets one of four factory-defined startup voltages (0.85V default); FSEL selects 1.5/2.25/2.5/3.0MHz |
| PG | Power-good open-drain output | Signals valid regulation (92–98% UV, 102–108% OV window); daisy-chained in stacked configurations |
| VIN / GND / SW | Power input, ground, switch node | VIN pins (5,9) require local 5–10µF ceramic capacitors; SW connects to external inductor; thermal pad must be grounded |
Key Features
| Feature | Design Value |
|---|---|
| Stackable architecture | Multiple TPS62871Z4WRXSR units can be synchronized and paralleled to scale output current beyond 9A while distributing thermal load |
| Differential remote sensing | Compensates for up to 100mV IR drop between regulator and load, preserving ±1% regulation accuracy at point-of-load |
| Adjustable external compensation | COMP pin allows full control over loop bandwidth and phase margin using R-C network - supports wide range of output capacitors and inductors |
| Active output discharge | Internal 6Ω resistive or 50–200mA constant-current discharge path ensures safe VOUT ramp-down during disable or fault |
| I²C programmability | Enables runtime voltage adjustment, temperature readback, thermal warning flag, and fault status interrogation without hardware changes |
| Wettable flank package | RXS VQFN enables AOI-compatible solder joint inspection - critical for automotive and industrial high-reliability manufacturing |
Applications
| FPGA Core Power Supply | DDR4/DDR5 Memory Rail |
|---|---|
|
Use Scenario: Powering 16nm/7nm FPGA fabric and I/O banks with dynamic voltage scaling requirements. IC Role / Device Role / Timing Role: Primary point-of-load regulator delivering tightly regulated 0.85V core voltage with <10µs transient response to logic state changes. Use Value: I²C-controlled voltage adjustment enables real-time adaptation to processing load, reducing dynamic power by up to 30% versus fixed-voltage designs. |
Use Scenario: Supplying DDR4/DDR5 VDD/VDDQ rails in server memory modules with strict ±1% tolerance and fast load-step response. IC Role / Device Role / Timing Role: High-current buck converter with differential remote sensing placed adjacent to memory DIMM to minimize IR loss. Use Value: ±1% accuracy maintained at point-of-load ensures signal integrity and timing margin compliance across temperature and aging. |
| Optical Network Processor (ONP) | Multi-Core SoC Power Delivery |
|
Use Scenario: Powering 100G/400G coherent DSPs and SerDes in telecom line cards where thermal density exceeds 10W/cm². IC Role / Device Role / Timing Role: Stackable 9A regulator operating in forced-PWM mode to suppress output ripple below 10mVpp at 2.25MHz. Use Value: Stacking two TPS62871Z4WRXSR units delivers 18A with distributed thermal dissipation, avoiding localized hotspots on dense PCBs. |
Use Scenario: Delivering configurable core voltage to heterogeneous ARM/RISC-V clusters in edge AI accelerators. IC Role / Device Role / Timing Role: I²C-managed power rail supporting dynamic voltage and frequency scaling (DVFS) coordinated with system controller. Use Value: Real-time voltage updates via I²C enable sub-millisecond transition between performance and low-power states without reset or delay. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-current synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62872Z4WRXSR | 12A rating, identical pinout and feature set but higher current capability and slightly higher RDS(on) (7.5mΩ/4.5mΩ) | Better suited for future-proofing or margin-critical 10–12A loads; requires validation of thermal headroom at full load | Select when >9A continuous current or higher thermal design margin is required; same layout and firmware compatibility |
| MP2965AGU-Z | 8A, 2.7–16V input, no I²C, uses PMBus 1.3 interface; lacks differential remote sensing and stackable sync | Targeted at industrial power supplies where I²C is unnecessary and wider VIN range is prioritized over precision PoL regulation | Choose for cost-sensitive, non-DVFS applications needing broader input range but accepting ±1.5% accuracy and no stacking |
Compared with TPS62871Z4WRXSR, the TPS62872Z4WRXSR offers higher current headroom with identical footprint and control features, while the MP2965AGU-Z trades I²C programmability and remote sensing for extended input range and lower BOM cost - making each suitable for distinct system-level trade-offs in performance, accuracy, and scalability.
Availability
TPS62871Z4WRXSR is available at Aetrix Electronics and suitable for FPGA core supply, DDR memory rail, optical network processor power, and multi-core SoC applications requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for TPS62871Z4WRXSR 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 and system-level power architecture.
The TPS6287x family was designed specifically for high-performance digital load regulation - addressing the demand for fast-transient, I²C-configurable, stackable buck converters in advanced computing, networking, and AI acceleration platforms.
FAQ
What is the default startup output voltage of the TPS62871Z4WRXSR?
The TPS62871Z4WRXSR has a factory-default startup output voltage of 0.85V, selected via the VSEL pin configuration (6.2kΩ to GND). This value is one of four pre-programmed options (0.85V, 0.75V, 0.875V, or 1.00V), and can be changed dynamically via I²C after power-up without requiring hardware modification.
Does the TPS62871Z4WRXSR support stacking with other current ratings in the TPS6287x family?
No - the TPS62871Z4WRXSR must only be stacked with other TPS62871x variants (e.g., TPS62871Z0WRXSR or TPS62871Z2WRXSR). Mixing with TPS62870 (6A), TPS62872 (12A), or TPS62873 (15A) devices is not supported, as mismatched current ratings cause uneven current sharing and premature current-limit activation in the lower-rated unit.
What is the maximum I²C clock frequency supported by the TPS62871Z4WRXSR?
The TPS62871Z4WRXSR supports I²C Fast Mode Plus operation up to 1MHz, with timing compliance verified per JEDEC JESD85. This enables sub-100µs register writes for voltage updates, making it suitable for dynamic voltage scaling in real-time processor workloads without introducing system latency.
How does the differential remote sensing of the TPS62871Z4WRXSR improve regulation accuracy?
The TPS62871Z4WRXSR uses dedicated VOSNS and GOSNS pins to measure output voltage directly at the load, rejecting voltage drop across PCB traces and connectors. This maintains ±1% DC accuracy at the point-of-load across all operating conditions - unlike single-point sensing, which degrades to ±3–5% under high-current, high-temperature conditions.
Can the TPS62871Z4WRXSR operate without an external compensation network?
No - the TPS62871Z4WRXSR requires an external resistor and capacitor connected between COMP and GOSNS to stabilize the control loop. The values depend on output capacitance, inductance, and target bandwidth; TI provides design calculators and reference schematics in SLVSGC5E to determine optimal R-C values for specific application conditions.
TPS62871Z4WRXSR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-TFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Programmable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 0.4V
- Voltage - Output (Max):
- 3.35V
- Current - Output:
- 9A
- Frequency - Switching:
- 1.5MHz, 2.25MHz, 2.5MHz, 3MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 16-VQFN (2.55x3.55)
TPS62871Z4WRXSR FAQ
1.How can I place an order for TPS62871Z4WRXSR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62871Z4WRXSR 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 TPS62871Z4WRXSR reliable?
The price and inventory of TPS62871Z4WRXSR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62871Z4WRXSR is usually 5 days.
3.What payment methods are accepted for TPS62871Z4WRXSR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62871Z4WRXSR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62871Z4WRXSR?
TPS62871Z4WRXSR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62871Z4WRXSR 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 TPS62871Z4WRXSR?
For technical support, including TPS62871Z4WRXSR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62871Z4WRXSR requirements.
6.How does Aetrix verify that TPS62871Z4WRXSR is sourced from the original manufacturer or authorized distributors?
All TPS62871Z4WRXSR 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 TPS62871Z4WRXSR meets industry standards.
7.What is the process for return or replacement of TPS62871Z4WRXSR?
All TPS62871Z4WRXSR units undergo pre-shipment inspection (PSI). If there is an issue with TPS62871Z4WRXSR, 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 TPS62871Z4WRXSR part is unused and in its original packaging.
Return procedure for TPS62871Z4WRXSR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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