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Texas Instruments TPS62871Z0WRXSR
- Part No.:
- TPS62871Z0WRXSR
- Manufacturer:
- Texas Instruments
- Package:
- 16-TFQFN Exposed Pad
- Datasheet:
-
TPS62871Z0WRXSR.pdf
- Description:
- IC REG BUCK PROG 9A 16VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,445
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Product details
Overview
TPS62871Z0WRXSR from Texas Instruments is a 9A 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 ±1% output voltage accuracy, supports 1.5–3.0MHz resistor-selectable switching frequency, and integrates 7mΩ/4.5mΩ power MOSFETs in a 2.55mm × 3.55mm VQFN-FCRLF (RXS) package.
For engineers reviewing the TPS62871Z0WRXSR datasheet, TPS62871Z0WRXSR pinout, TPS62871Z0WRXSR application, or TPS62871Z0WRXSR equivalent, this device is selected for high-density point-of-load regulation requiring fast transient response, I²C programmability, thermal warning, and precise remote-sense accuracy in DDR memory and optical network power rails.
Technical Context
The TPS62871Z0WRXSR implements a fixed-frequency DCS-Control topology with inner emulated current loop, middle direct feedback loop, and outer voltage-regulating loop to achieve sub-10µs load transient recovery. Its differential remote sensing (VOSNS/GOSNS) enables ±1% DC regulation at the point-of-load under all operating conditions.
It supports dual operation modes: forced-PWM for lowest output ripple and best transient performance, or power-save mode for maximum efficiency at light loads. The I²C interface (up to 1MHz) provides real-time voltage monitoring, thermal warnings, and dynamic output voltage adjustment without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 9A continuous - supports high-power digital cores without derating at 125°C junction temperature |
| Input Voltage Range | 2.7V to 6V - compatible with 3.3V and 5V intermediate bus architectures |
| Output Voltage Accuracy | ±1% - guaranteed DC regulation at point-of-load via differential remote sensing |
| Switching Frequency | 1.5 / 2.25 / 2.5 / 3.0 MHz (resistor-selectable) - enables compact 110–330nH inductor selection and EMI optimization |
| I²C Interface Speed | Up to 1 MHz - allows rapid voltage reconfiguration during DVFS sequences in processors |
| Junction Temperature Range | –40°C to +125°C - qualified for industrial and telecom infrastructure environments |
| Thermal Warning Threshold | 150°C - triggers early thermal alert before shutdown (170°C), enabling system-level thermal management |
Pinout & Package
TPS62871Z0WRXSR uses a 16-pin RXS (VQFN-FCRLF) package measuring 2.55mm × 3.55mm × 1mm with wettable flanks and an exposed thermal pad soldered to GND for optimal thermal performance (RθJB = 7.7°C/W).
| 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 | Differential ground sense input | Measures return path voltage drop to enable true point-of-load regulation |
| VOSNS | Differential output voltage sense input | Paired with GOSNS to reject PCB IR drop and maintain ±1% accuracy |
| EN | Enable control input | Active-high with internal pulldown; requires ≥15kΩ series resistor for robust noise immunity |
| VIN (Pins 5,9) | Main power input | Dual VIN pins reduce trace inductance and improve high-frequency decoupling |
| GND (Pins 6,8) | Power ground | Dual GND pins minimize ground bounce in high-di/dt 9A operation |
| SW | Power switch node | Connects to external inductor; requires tight layout to minimize EMI and switching losses |
| PG | Open-drain power-good output | Signals valid output with window comparator; daisy-chained in stacked configurations |
| MODE/SYNC | Mode select & external clock sync | Pull low for power-save, high for forced-PWM; accepts external clock for synchronized multi-rail systems |
| SDA / SCL | I²C bidirectional data & clock | Supports up to 1MHz Fast Mode Plus; must be pulled up externally per I²C spec |
| VSEL | Startup voltage select | Resistor-to-GND/VIN sets one of four factory-configured startup voltages (e.g., 0.800V @ 0x40) |
| FSEL | Frequency select | Resistor-to-GND/VIN selects nominal switching frequency (1.5/2.25/2.5/3.0 MHz) |
| SYNC_OUT | Internal clock output | Drives MODE/SYNC of next device in daisy-chain stack; defines secondary role when pulled to GND |
Key Features
| Feature | Design Value |
|---|---|
| Stackable architecture | Enables parallel operation of identical-current devices (e.g., two TPS62871Z0WRXSR = 18A) with shared COMP, EN, and PG signals |
| Differential remote sensing | Compensates for PCB trace resistance up to ±100mV common-mode range, ensuring ±1% regulation at load |
| Adjustable external compensation | Allows fine-tuning of loop stability for varied output capacitor ESR/ESL and load dynamics |
| Active output discharge | Provides controlled 50–200mA constant-current or 6Ω resistive discharge to prevent floating outputs during disable |
| Thermal warning & shutdown | Generates interrupt at 150°C (warning) and disables at 170°C (shutdown) with 20°C hysteresis for reliable thermal protection |
| Power-good with window comparator | Monitors output within ±4% to ±8% tolerance bands (undervoltage/overvoltage) for safe system sequencing |
Applications
| Application 1 | Application 2 |
|---|---|
Use Scenario: Power delivery to FPGA transceiver banks requiring tight voltage tolerance and fast load-step response during high-speed serial link training. IC Role / Device Role / Timing Role: Primary point-of-load regulator with differential remote sensing and I²C-adjustable voltage for dynamic voltage scaling. Use Value: Maintains ±1% output accuracy at the BGA ball despite PCB IR drop, enabling stable 28Gbps PAM4 signaling. | Use Scenario: Core supply for multi-core ASICs in optical line cards where thermal density demands distributed power conversion. IC Role / Device Role / Timing Role: Stackable 9A buck converter configured in 2× parallel for 18A total, synchronized via SYNC_OUT/MODE pins. Use Value: Spreads 12W+ dissipation across two devices while maintaining phase-aligned switching and shared thermal monitoring. |
| Application 3 | Application 4 |
Use Scenario: DDR4/DDR5 memory VDDQ rail in enterprise SSD controllers where voltage ripple directly impacts signal integrity. IC Role / Device Role / Timing Role: Forced-PWM mode regulator with 2.25MHz switching and low-ESR ceramic output capacitors. Use Value: Achieves <10mVpp output ripple at 9A, meeting JEDEC DDR5 VDDQ noise requirements without additional filtering. | Use Scenario: Intermediate bus converter in 5G radio unit baseband processing modules with strict EMI limits. IC Role / Device Role / Timing Role: Spread-spectrum enabled buck converter synchronized to system clock to shift noise energy away from critical bands. Use Value: Reduces peak radiated emissions by >10dB at 2.25MHz fundamental while maintaining full 9A output capability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62872Z0WRXSR | 12A rated, higher RDS(on) (7mΩ/4.5mΩ same), identical pinout and feature set | Used where higher current headroom is required without changing PCB layout | Select when design margin exceeds 9A or future-proofing for higher-power derivatives is needed |
| TPS62864ARVCR | 6A, no I²C interface, 2.5V–5.5V input, 0.6V–1.8V output, 1.8MHz fixed fSW | Targeted at cost-sensitive, non-DVFS applications without remote sensing or thermal warning | Choose for simpler, lower-current designs where I²C control and stackability are unnecessary |
Compared with TPS62871Z0WRXSR, TPS62872Z0WRXSR offers +33% current capacity in identical footprint but consumes more board area per amp; TPS62864ARVCR reduces feature count and cost but sacrifices programmability, remote sensing, and thermal intelligence required for high-end compute rails.
Availability
TPS62871Z0WRXSR is available at Aetrix Electronics and suitable for FPGA core supplies, DDR memory rails, and optical network power systems requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for TPS62871Z0WRXSR 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-current, high-accuracy point-of-load regulation in advanced digital systems-emphasizing fast transient response, I²C configurability, thermal resilience, and seamless stackability for scalable power delivery.
FAQ
What is the default startup voltage for TPS62871Z0WRXSR?
The TPS62871Z0WRXSR has a factory-configured default startup voltage of 0.800V, corresponding to I²C address 0x40. This is set by internal resistor ladder on the VSEL pin; external resistor configuration (e.g., 6.2kΩ to GND) maintains this default. Other startup voltages (0.750V, 0.875V, 0.800V) are selectable via VSEL pin strapping, but 0.800V is the shipped default for TPS62871Z0WRXSR.
Does TPS62871Z0WRXSR support spread-spectrum operation?
Yes, TPS62871Z0WRXSR supports spread-spectrum operation with ±10% frequency modulation around the nominal switching frequency (1.5/2.25/2.5/3.0 MHz). This feature is disabled by default and can be enabled via I²C register write. Spread-spectrum reduces peak EMI emissions without affecting output voltage accuracy or transient performance of the TPS62871Z0WRXSR.
Can TPS62871Z0WRXSR be used without connecting the SDA and SCL pins?
No - SDA and SCL pins must not be left floating. For TPS62871Z0WRXSR (which includes full I²C functionality), both pins require external pull-up resistors to a logic-high voltage (e.g., 3.3V). Leaving them unconnected violates I²C bus specifications and may cause erratic communication or startup failure. The TPS62871Z0WRXSR relies on proper I²C termination for reliable initialization and register access.
What is the maximum output capacitance supported by TPS62871Z0WRXSR?
The TPS62871Z0WRXSR supports output capacitance values up to several millifarads depending on application conditions. While the recommended range is ≥40µF (effective), designs have successfully used ≥1000µF ceramic or hybrid polymer capacitors. Stability remains assured due to adjustable external compensation (COMP pin), and large COUT improves hold-up time and load-transient suppression - key for TPS62871Z0WRXSR deployments in burst-mode processor workloads.
How does thermal warning work on TPS62871Z0WRXSR?
The TPS62871Z0WRXSR monitors die temperature internally and asserts a thermal warning flag via I²C register (address 0x12, bit 0) when junction temperature reaches 150°C. This is distinct from thermal shutdown (170°C). The warning provides 20°C headroom for system firmware to throttle loads or increase fan speed before shutdown occurs - enabling graceful degradation rather than abrupt failure in thermally constrained TPS62871Z0WRXSR applications.
TPS62871Z0WRXSR 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)
TPS62871Z0WRXSR FAQ
1.How can I place an order for TPS62871Z0WRXSR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62871Z0WRXSR 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 TPS62871Z0WRXSR reliable?
The price and inventory of TPS62871Z0WRXSR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62871Z0WRXSR is usually 5 days.
3.What payment methods are accepted for TPS62871Z0WRXSR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62871Z0WRXSR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62871Z0WRXSR?
TPS62871Z0WRXSR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62871Z0WRXSR 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 TPS62871Z0WRXSR?
For technical support, including TPS62871Z0WRXSR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62871Z0WRXSR requirements.
6.How does Aetrix verify that TPS62871Z0WRXSR is sourced from the original manufacturer or authorized distributors?
All TPS62871Z0WRXSR 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 TPS62871Z0WRXSR meets industry standards.
7.What is the process for return or replacement of TPS62871Z0WRXSR?
All TPS62871Z0WRXSR units undergo pre-shipment inspection (PSI). If there is an issue with TPS62871Z0WRXSR, 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 TPS62871Z0WRXSR part is unused and in its original packaging.
Return procedure for TPS62871Z0WRXSR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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