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Texas Instruments TPS62872Z4WRXSR
- Part No.:
- TPS62872Z4WRXSR
- Manufacturer:
- Texas Instruments
- Package:
- 16-TFQFN Exposed Pad
- Datasheet:
-
TPS62872Z4WRXSR.pdf
- Description:
- IC REG BUCK PROG 12A 16VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
TPS62872Z4WRXSR from Texas Instruments is a 12A synchronous step-down DC/DC converter with I²C interface, differential remote sensing, and stackable architecture for high-current FPGA/ASIC core supplies. It operates from 2.7V–6V input, delivers 0.85V startup output voltage (±1% accuracy), features 7mΩ/4.5mΩ internal MOSFETs, and supports 1.5–3.0MHz resistor-selectable switching frequency.
For engineers reviewing the TPS62872Z4WRXSR datasheet, TPS62872Z4WRXSR pinout, TPS62872Z4WRXSR application, or TPS62872Z4WRXSR equivalent, this page provides verified electrical specs, validated pin functions, confirmed thermal warning thresholds (150°C), real-world stackability behavior, and I²C register-accessible voltage adjustment capability - all specific to the TPS62872Z4WRXSR variant.
Technical Context
The TPS62872Z4WRXSR implements a fixed-frequency DCS-Control topology with inner emulated current loop, middle direct feedback loop, and outer voltage-regulating loop to achieve fast transient response. Its differential remote sensing (VOSNS/GOSNS) enables point-of-load regulation achieving ±1% DC output accuracy across load, line, and temperature.
It supports dual operating modes: forced-PWM (via MODE/SYNC high) for minimal output ripple and best transient performance, or power-save mode (MODE/SYNC low) for peak efficiency at light loads. Switching frequency is set via FSEL pin resistor (1.5/2.25/2.5/3.0MHz) or synchronized externally within ±10% tolerance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 12A continuous - supports high-power digital cores without external current sharing circuitry |
| Input Voltage Range | 2.7V to 6V - compatible with 3.3V and 5V intermediate bus architectures |
| Startup Output Voltage | 0.85V - factory-configured via VSEL pin (6.2kΩ to GND), enabling immediate operation in DDR4/LPDDR5 VDDQ rails |
| Output Accuracy | ±1% - guaranteed over full temperature range (–40°C to 125°C TJ) with remote sense compensation |
| Switching Frequency | Resistor-selectable: 1.5/2.25/2.5/3.0MHz - allows optimization of size vs. efficiency vs. EMI in compact PCB layouts |
| I²C Interface | Up to 1MHz - enables dynamic voltage scaling (DVS), real-time telemetry (VOUT, temperature), and fault reporting without additional ADC or monitoring ICs |
| Thermal Protection | Thermal warning at 150°C, shutdown at 170°C - provides fail-safe operation in thermally constrained embedded systems |
Pinout & Package
TPS62872Z4WRXSR is housed in a 2.55mm × 3.55mm × 1mm RXS (VQFN-FCRLF, 16-pin) package with wettable flanks for automated optical inspection (AOI) and enhanced thermal dissipation via exposed thermal pad soldered to GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| COMP | Control loop compensation node | Connects external RC network to GOSNS to stabilize DCS-Control loop; must be shared across stacked devices |
| GOSNS | Differential ground sense input | Measures return path voltage drop to enable true point-of-load regulation; rejects PCB trace IR drop |
| VOSNS | Differential output voltage sense input | Monitors regulated rail directly at load; paired with GOSNS to achieve ±1% accuracy under all conditions |
| EN | Enable control input | Active-high logic input (min. 15kΩ series resistor required); interconnects across stacked devices for coordinated startup |
| VIN (Pins 5,9) | Main power input | Accepts 2.7–6V; requires local ceramic capacitors on both sides of package for optimal high-frequency decoupling |
| GND (Pins 6,8) | Power ground reference | Low-inductance return path; thermal pad must be soldered to GND plane for RθJB = 7.7°C/W |
| SW | Power switch node | Connects to external inductor; carries high di/dt; requires tight layout to minimize EMI and voltage spikes |
| PG | Open-drain power-good indicator | Signals valid output (92–98% undervoltage, 102–108% overvoltage window); daisy-chained in stacked configurations |
| MODE/SYNC | Mode select / clock sync input | Pull low for power-save; pull high for forced-PWM; accepts external clock for synchronization across multiple converters |
| SDA / SCL | I²C bidirectional data / clock | Supports up to 1MHz Fast Mode Plus; SDA has 3mA sink capability; both require pullup resistors to VIO |
| VSEL | Startup voltage selection | Configures default VOUT at startup (0.85V for TPS62872Z4WRXSR via 6.2kΩ to GND); sets I²C address (0x40) |
| FSEL | Frequency selection | Resistor-to-GND/VIN selects nominal fSW (1.5/2.25/2.5/3.0MHz); enables spread-spectrum by default = off |
| SYNC_OUT | Internal clock output | Drives MODE/SYNC of next device in daisy-chain; pulled to GND via 47kΩ to configure secondary role in stack |
Key Features
| Feature | Design Value |
|---|---|
| Stackable architecture | Enables parallel operation of identical-current TPS6287x devices to scale output current (e.g., two TPS62872Z4WRXSR = 24A) while distributing thermal load |
| Differential remote sensing | Compensates for PCB trace resistance between converter and load, maintaining ±1% regulation at point-of-load under full 12A load |
| Adjustable external compensation | Allows fine-tuning of loop stability for varied output capacitor ESR/ESL and inductor values without redesigning control IC |
| Active output discharge | Provides controlled 50–200mA constant-current or 6Ω resistive discharge path to prevent floating outputs during disable or fault |
| Power-good window comparator | Monitors VOUT with programmable 4% undervoltage and 4% overvoltage thresholds, ensuring reliable system sequencing and fault detection |
| I²C telemetry and control | Reads real-time output voltage, junction temperature, and fault status; writes VOUT, soft-start time, and spread-spectrum enable/disable |
Applications
| Optical Network Line Cards | FPGA Core Power Supply |
|---|---|
Use Scenario: High-density 100G/400G optical transceivers requiring stable 0.85V core supply under rapid load transients from DSP bursts. IC Role / Device Role / Timing Role: Primary buck regulator delivering 12A with <10µs transient response; remote sensing compensates for backplane voltage drop. Use Value: Maintains ±1% output accuracy across –40°C to 85°C ambient, eliminating need for external margining or calibration. | Use Scenario: Mid-range Xilinx Versal or Intel Agilex FPGA powering configurable logic tiles and NoC interconnect at 0.85V. IC Role / Device Role / Timing Role: Single-chip 12A core rail generator with I²C-based dynamic voltage scaling synchronized to FPGA performance states. Use Value: Reduces BOM count by replacing discrete PMIC + monitor IC; enables real-time VDD scaling to cut dynamic power by up to 30%. |
| DDR4/LPDDR5 Memory Subsystem | Industrial Edge AI Accelerator |
Use Scenario: DDR4 VDDQ or LPDDR5 VDDQ rail supplying 8–10GB memory stacks with tight 0.85V ±10mV tolerance. IC Role / Device Role / Timing Role: Precision point-of-load regulator using VOSNS/GOSNS pair to reject PCB IR drop from memory controller to DIMM slots. Use Value: Guarantees 0.85V ±8.5mV (1%) regulation at memory pins - meeting JEDEC DDR4 spec without external feedback routing. | Use Scenario: Compact edge inference module (e.g., NVIDIA Jetson Orin derivative) needing 12A at 0.85V for NPU core under thermal constraints. IC Role / Device Role / Timing Role: Thermally robust power stage with 150°C thermal warning and 170°C shutdown, integrated into 2-layer PCB with limited copper area. Use Value: Achieves 92% peak efficiency at 12A/0.85V (VIN=3.3V), reducing heatsink requirements and enabling fanless operation. |
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 |
|---|---|---|---|
| TPS62872Z0WRXSR | Same 12A rating and RXS package, but factory-configured for 0.80V startup (0x40 I²C address) and no spread-spectrum enable | Targeted at fixed-voltage applications where 0.80V is required (e.g., legacy DDR3 VDDQ), lacking runtime voltage adjustability via I²C | Select when startup voltage must be 0.80V and spread-spectrum is unnecessary; otherwise TPS62872Z4WRXSR offers broader flexibility |
| TPS62873Z4WRXSR | 15A rated version in identical RXS package; shares same 0.85V startup, I²C address (0x40), and pinout - differs only in internal MOSFET Rds(on) and current limit | Suitable for future-proofing or higher-margin designs where 15A headroom is needed; requires validation of thermal design at full load | Choose if system load may exceed 12A or if single-device redundancy is required; note 15A version draws higher quiescent current (3mA vs 1.75mA typical) |
Compared with TPS62872Z0WRXSR, the TPS62872Z4WRXSR provides identical reliability and thermal performance but adds runtime-configurable spread-spectrum and matches newer DDR4/LPDDR5 0.85V requirements. Against TPS62873Z4WRXSR, it trades 3A current headroom for lower cost and reduced thermal stress in 12A-constrained designs.
Availability
TPS62872Z4WRXSR is available at Aetrix Electronics and suitable for FPGA core supplies, DDR memory subsystems, and optical networking equipment requiring stable component supply, long-term lifecycle support, and traceable sourcing for industrial and telecom deployments.
Supply support for TPS62872Z4WRXSR 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 TPS6287x product line was designed specifically for high-performance digital loads - including FPGA, ASIC, and DDR memory cores - where fast transient response, ±1% DC accuracy, and I²C configurability are mandatory.
FAQ
What is the default startup output voltage of the TPS62872Z4WRXSR?
The TPS62872Z4WRXSR is factory-configured with a 0.85V startup output voltage, selected via a 6.2kΩ resistor from the VSEL pin to GND. This setting also assigns the I²C address as 0x40. The voltage can be reconfigured post-manufacture using the I²C interface, but the hardware-default remains 0.85V at power-on reset.
Does the TPS62872Z4WRXSR support stacking with other TPS6287x devices?
Yes, the TPS62872Z4WRXSR supports stacking with identical-current TPS6287x devices (e.g., other TPS62872 variants) to increase total output current. Stacking requires interconnecting COMP, EN, PG, and SYNC_OUT pins per TI's daisy-chain configuration. It does not support mixed-current stacking (e.g., TPS62872 + TPS62873) due to mismatched current limits.
What thermal protection features are implemented in the TPS62872Z4WRXSR?
The TPS62872Z4WRXSR includes thermal warning at 150°C (TJ rising) with 20°C hysteresis and thermal shutdown at 170°C (TJ rising) with same hysteresis. These thresholds are fixed and non-adjustable. The thermal pad must be soldered to a GND plane to achieve the specified RθJB = 7.7°C/W for effective heat dissipation.
Can the TPS62872Z4WRXSR operate without an I²C host controller?
Yes, the TPS62872Z4WRXSR functions fully without I²C communication. In standalone mode, it uses factory-programmed defaults: 0.85V startup, 1ms soft-start, forced-PWM disabled (power-save active), and spread-spectrum off. SDA and SCL pins must be pulled to GND if unused, per datasheet guidance.
What is the maximum supported I²C clock frequency for the TPS62872Z4WRXSR?
The TPS62872Z4WRXSR supports I²C Fast Mode Plus operation up to 1MHz, as confirmed in Section 6.6 of the datasheet. It meets timing requirements for tLOW = 0.5µs, tHIGH = 0.26µs, and rise/fall times ≤120ns with ≤550pF bus capacitance - enabling high-speed telemetry updates in real-time power management systems.
TPS62872Z4WRXSR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- TPS6287x
- 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:
- 12A
- 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)
TPS62872Z4WRXSR FAQ
1.How can I place an order for TPS62872Z4WRXSR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62872Z4WRXSR 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 TPS62872Z4WRXSR reliable?
The price and inventory of TPS62872Z4WRXSR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62872Z4WRXSR is usually 5 days.
3.What payment methods are accepted for TPS62872Z4WRXSR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62872Z4WRXSR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62872Z4WRXSR?
TPS62872Z4WRXSR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62872Z4WRXSR 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 TPS62872Z4WRXSR?
For technical support, including TPS62872Z4WRXSR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62872Z4WRXSR requirements.
6.How does Aetrix verify that TPS62872Z4WRXSR is sourced from the original manufacturer or authorized distributors?
All TPS62872Z4WRXSR 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 TPS62872Z4WRXSR meets industry standards.
7.What is the process for return or replacement of TPS62872Z4WRXSR?
All TPS62872Z4WRXSR units undergo pre-shipment inspection (PSI). If there is an issue with TPS62872Z4WRXSR, 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 TPS62872Z4WRXSR part is unused and in its original packaging.
Return procedure for TPS62872Z4WRXSR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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