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Texas Instruments TPS62871Y1QWRXSRQ1
- Part No.:
- TPS62871Y1QWRXSRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 16-TFQFN Exposed Pad
- Datasheet:
-
TPS62871Y1QWRXSRQ1.pdf
- Description:
- IC REG BUCK ADJ 9A 16VQFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
TPS62871Y1QWRXSRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive synchronous step-down DC/DC converter delivering up to 9A continuous output current, supporting 2.7V–6V input, ±1% output voltage accuracy with differential remote sensing, and I²C interface (address 0x41) for dynamic voltage scaling in FPGA/ASIC core rails.
For engineers reviewing the TPS62871Y1QWRXSRQ1 datasheet, TPS62871Y1QWRXSRQ1 pinout, TPS62871Y1QWRXSRQ1 application, or TPS62871Y1QWRXSRQ1 equivalent, key selection criteria include its stackable 9A capability, resistor-selectable switching frequency (1.5/2.25/2.5/3.0 MHz), thermal warning threshold (150°C), forced-PWM/power-save mode control, and VQFN-FCRLF (RXS) package with wettable flanks for automotive-grade solder joint inspection.
Technical Context
The TPS62871Y1QWRXSRQ1 implements a fixed-frequency DCS-Control topology optimized for fast load transients in high-performance digital loads. It integrates 7 mΩ high-side and 4.5 mΩ low-side MOSFETs, supports differential remote sensing for point-of-load regulation, and enables stacking of identical-current devices to scale output current while distributing thermal load.
Its I²C interface (up to 1 MHz) provides real-time monitoring of output voltage, junction temperature, and fault status, plus programmable soft-start, spread-spectrum operation, and dynamic voltage adjustment - all critical for functional safety-compliant ADAS and infotainment power domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 9 A continuous - enables single-chip supply for mid-tier FPGA cores or DDR memory subsystems without external current sharing circuitry. |
| Input Voltage Range | 2.7 V to 6 V - compatible with automotive 3.3 V, 5 V, and battery-backed 12 V (via pre-regulator) rails. |
| Output Voltage Accuracy | ±1 % - guaranteed across –40°C to +125°C ambient, enabled by differential remote sensing (VOSNS/GOSNS). |
| Switching Frequency | 1.5 / 2.25 / 2.5 / 3.0 MHz (resistor-selectable via FSEL) - allows EMI optimization and compact magnetics design. |
| I²C Address | 0x41 - factory-programmed and linked to 0.750 V start-up voltage (VSEL shorted to GND); supports multi-device bus addressing. |
| Junction Temp Limit | 150 °C thermal warning, 170 °C shutdown - provides fail-safe protection in under-hood or high-density PCB environments. |
| Package | RXS (VQFN-FCRLF, 2.55 mm × 3.55 mm × 1 mm) with wettable flanks - supports automated optical inspection (AOI) of solder joints per automotive IPC-A-610. |
Pinout & Package
RXS package: 16-pin VQFN-FCRLF (2.55 mm × 3.55 mm × 1 mm) with 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; in stacked configurations, all COMP pins must be tied together for synchronized loop response. |
| VOSNS / GOSNS | Differential output voltage sense inputs | Enable true point-of-load regulation; reject PCB trace IR drop to maintain ±1% accuracy at load terminals. |
| EN | Enable input (active-high) | Requires ≥15 kΩ series resistor; enables coordinated startup/shutdown sequencing in multi-rail systems. |
| MODE/SYNC | Operating mode select / external clock sync input | Pull low for power-save mode (efficiency-optimized); pull high for forced-PWM (low ripple, fast transient); accepts external clock 1.3–3.3 MHz. |
| SDA / SCL | I²C bidirectional data / clock | Supports 1 MHz Fast Mode Plus; internal pullups disabled - external 2.2–10 kΩ pullups required to VIO (1.65–5.5 V). |
| VSEL | Startup voltage select | Short to GND selects 0.750 V default output; determines I²C address (0x41) and enables deterministic boot behavior. |
| FSEL | Switching frequency select | Resistor-to-GND/VIN sets nominal fSW; enables EMI reduction via spread-spectrum or precise synchronization in stacked arrays. |
| SYNC_OUT | Daisy-chain clock output | Drives MODE/SYNC of next device in stack; internally used during startup to auto-assign primary/secondary roles. |
Key Features
| Feature | Design Value |
|---|---|
| Stackable architecture | Enables scalable current delivery (e.g., two TPS62871Y1QWRXSRQ1 = 18 A) with automatic current balancing and shared thermal management. |
| Differential remote sensing | Compensates for up to 100 mV of PCB trace voltage drop between IC and load, ensuring ±1% regulation at point-of-load under all conditions. |
| Functional safety support | Includes documented failure modes, FIT rate data, and diagnostic coverage guidance for ISO 26262 ASIL-B system integration. |
| Active output discharge | Provides controlled 50–200 mA constant-current or 6 Ω resistive discharge path to prevent floating outputs during disable or fault events. |
| Power-good window comparator | Monitors output within ±4% (undervoltage) and ±6% (overvoltage) tolerance bands; open-drain PG output supports rail sequencing and system reset logic. |
Applications
| Infotainment Power Rail | ADAS Domain Controller Core |
|---|---|
|
Use Scenario: Supplying SoC cores (e.g., Qualcomm SA8155P) in automotive head units requiring dynamic voltage/frequency scaling. IC Role / Device Role / Timing Role: Primary buck regulator with I²C-controlled VOUT adjustment during performance state transitions (e.g., LPM → HP mode). Use Value: Enables >90% efficiency at 0.75 V/6 A and <50 µs transient recovery, reducing thermal load on densely packed infotainment PCBs. |
Use Scenario: Powering vision processor clusters (e.g., NVIDIA Orin) in front-camera or surround-view ECUs. IC Role / Device Role / Timing Role: High-current core rail with thermal warning output feeding watchdog logic to initiate graceful degradation before shutdown. Use Value: Delivers stable 0.8 V @ 9 A with <1% droop under 5 A/µs load steps, meeting ASIL-B timing constraints for real-time image processing. |
| FPGA I/O Bank Supply | DDR4/DDR5 Memory Subsystem |
|
Use Scenario: Generating configurable 1.2 V, 1.35 V, or 1.8 V supplies for Xilinx Versal I/O banks with varying interface standards. IC Role / Device Role / Timing Role: Programmable output rail using VSEL/I²C to match I/O voltage requirements during configuration or runtime reconfiguration. Use Value: Four factory-set VOUT ranges (down to 1.25 mV steps) allow precise matching to JEDEC-specified I/O voltages without external DACs. |
Use Scenario: Providing tightly regulated 1.1 V or 1.25 V to DDR4/DDR5 memory controllers and DRAM modules in telematics gateways. IC Role / Device Role / Timing Role: Differential-sense buck converter with active discharge to meet JEDEC tDIS < 1 ms requirement during power-down sequences. Use Value: Achieves <10 mV p-p ripple at 2.5 MHz switching and supports 40+ µF ceramic output capacitance for low-impedance memory bus decoupling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62872Y1QWRXSRQ1 | 12 A rated, higher RDS(on) (7/4.1 mΩ), same package and pinout | Higher current capability but increased conduction loss at 9 A; requires derating for same thermal footprint | Select when future-proofing for 12 A peak loads or paralleling with lower-current rails. |
| MPQ4436GL-AEC1 | 6 A rated, no I²C interface, fixed 500 kHz–3 MHz frequency, QFN-13 package | Lacks remote sensing, dynamic voltage control, and thermal warning; limited to simpler automotive body electronics | Choose for cost-sensitive, non-safety-critical 6 A rails where I²C telemetry and precision regulation are unnecessary. |
Compared with TPS62871Y1QWRXSRQ1, the TPS62872Y1QWRXSRQ1 offers higher current headroom at the expense of marginally lower efficiency below 9 A, while the MPQ4436GL-AEC1 trades programmability and sensing fidelity for BOM simplicity in less demanding applications.
Availability
TPS62871Y1QWRXSRQ1 is available at Aetrix Electronics and suitable for infotainment systems, ADAS domain controllers, and FPGA-based automotive compute platforms requiring stable component supply, AEC-Q100 compliance, and functional safety documentation support.
Supply support for TPS62871Y1QWRXSRQ1 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 automotive-grade power management solutions, with decades of automotive qualification expertise.
The TPS6287x-Q1 product line was designed specifically for high-current, safety-critical automotive power rails - emphasizing fast transient response, differential sensing, stackability, and comprehensive functional safety documentation for ASIL-B systems.
FAQ
What is the default I²C address and startup voltage of the TPS62871Y1QWRXSRQ1?
The TPS62871Y1QWRXSRQ1 has a factory-configured I²C address of 0x41 and a default startup output voltage of 0.750 V, achieved by shorting the VSEL pin to GND. This configuration is fixed and cannot be altered post-manufacture; the I²C address is intrinsically tied to the VSEL setting per TI's device options table.
Can the TPS62871Y1QWRXSRQ1 be stacked with other TPS6287x-Q1 variants?
Yes, the TPS62871Y1QWRXSRQ1 can be stacked only with other 9 A-rated TPS6287x-Q1 devices (e.g., TPS62871QWRXSRQ1 or TPS62871Y0QWRXSRQ1) to increase total output current. Stacking with 6 A, 12 A, or 15 A variants is not supported, as mismatched current ratings cause premature current limiting and unbalanced thermal stress.
Does the TPS62871Y1QWRXSRQ1 support spread-spectrum operation?
Yes, the TPS62871Y1QWRXSRQ1 supports spread-spectrum modulation by default (disabled at power-up). It can be enabled via I²C register write to reduce conducted and radiated EMI peaks - particularly valuable in sensitive RF-rich automotive cabins where EMC compliance is mandatory.
What is the purpose of the SYNC_OUT pin on the TPS62871Y1QWRXSRQ1?
The SYNC_OUT pin on the TPS62871Y1QWRXSRQ1 serves two functions: during startup, it identifies secondary devices in a stack when pulled to GND via 47 kΩ; during operation, it outputs the internal switching clock to synchronize MODE/SYNC pins of downstream converters in daisy-chained stacks - ensuring phase alignment and minimizing input capacitor RMS current.
How does the differential remote sensing work on the TPS62871Y1QWRXSRQ1?
The TPS62871Y1QWRXSRQ1 uses dedicated VOSNS (output voltage sense) and GOSNS (output ground sense) pins to measure voltage directly at the load terminals. This rejects voltage drops across PCB traces and connectors, enabling ±1% regulation accuracy at the point-of-load - critical for sub-1 V digital core supplies where even 10 mV error impacts timing margins.
TPS62871Y1QWRXSRQ1 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:
- Adjustable
- 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 (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 16-VQFN (2.55x3.55)
TPS62871Y1QWRXSRQ1 FAQ
1.How can I place an order for TPS62871Y1QWRXSRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62871Y1QWRXSRQ1 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 TPS62871Y1QWRXSRQ1 reliable?
The price and inventory of TPS62871Y1QWRXSRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62871Y1QWRXSRQ1 is usually 5 days.
3.What payment methods are accepted for TPS62871Y1QWRXSRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62871Y1QWRXSRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62871Y1QWRXSRQ1?
TPS62871Y1QWRXSRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62871Y1QWRXSRQ1 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 TPS62871Y1QWRXSRQ1?
For technical support, including TPS62871Y1QWRXSRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62871Y1QWRXSRQ1 requirements.
6.How does Aetrix verify that TPS62871Y1QWRXSRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS62871Y1QWRXSRQ1 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 TPS62871Y1QWRXSRQ1 meets industry standards.
7.What is the process for return or replacement of TPS62871Y1QWRXSRQ1?
All TPS62871Y1QWRXSRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS62871Y1QWRXSRQ1, 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 TPS62871Y1QWRXSRQ1 part is unused and in its original packaging.
Return procedure for TPS62871Y1QWRXSRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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