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Texas Instruments TPS6281008QWRWYRQ1
- Part No.:
- TPS6281008QWRWYRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 9-VFQFN
- Datasheet:
-
TPS6281008QWRWYRQ1.pdf
- Description:
- IC REG BUCK 1.1V 4A 9VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,803
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Product details
Overview
TPS6281008QWRWYRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive synchronous step-down DC/DC converter delivering up to 4 A continuous output current with fixed 1.1 V output voltage, 1.8–4 MHz adjustable switching frequency, ±1% feedback voltage accuracy in PWM mode, and operation across 2.75 V to 6 V input range. It serves as the primary power rail for ADAS sensor fusion ECUs requiring high efficiency, precise sequencing, and robust thermal performance at +125°C ambient.
For engineers reviewing the TPS6281008QWRWYRQ1 datasheet, TPS6281008QWRWYRQ1 pinout, TPS6281008QWRWYRQ1 application, or TPS6281008QWRWYRQ1 equivalent, key selection criteria include its 4 A output capability, fixed 1.1 V output with 1% accuracy, wettable-flank VQFN-9 package, active output discharge, and functional safety documentation support for ISO 26262-compliant systems.
Technical Context
The TPS6281008QWRWYRQ1 implements peak current mode control with internally compensated loop architecture and three selectable compensation settings-configured via resistor on COMP/FSET-to match output capacitance (27–470 µF) and optimize transient response. Its MODE/SYNC pin supports both forced PWM and automatic PFM/PWM transition, plus external synchronization from 1.8 MHz to 4 MHz with <50 µs lock time.
It integrates low-RDS(on) MOSFETs (HS: 37–60 mΩ, LS: 15–35 mΩ at VIN ≥ 5 V), 100% duty cycle capability, precise ENABLE with 1.1 V rising threshold and 100 mV hysteresis, and a dedicated SS/TR pin enabling soft-start ramp control or voltage tracking for multi-rail sequencing in infotainment and cluster applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 4 A continuous - supports high-power SoCs and FPGAs in ADAS domain controllers without derating at +125°C ambient. |
| Output Voltage | Fixed 1.1 V ±1% (PWM mode) - eliminates external feedback resistors and ensures stable core supply for 1.1 V logic rails. |
| Input Voltage Range | 2.75 V to 6 V - compatible with 3.3 V, 5 V, and automotive battery-supplied rails including cold-crank transients down to 2.75 V. |
| Switching Frequency | 1.8 MHz to 4 MHz (adjustable) - enables compact magnetics and EMI filtering while avoiding AM band; supports external sync for multi-converter phase alignment. |
| Quiescent Current | 15 µA typical - maintains ultra-low standby power in always-on telematics modules without compromising wake-up responsiveness. |
| Thermal Performance | RθJA = 71.1°C/W (VQFN-9) - sustains full 4 A load at +125°C ambient when using 2-layer PCB with thermal vias under exposed pad. |
| Power-Good Output | Open-drain PG with window comparator (±5% UVP/OVP) - provides reliable system-level power sequencing and fault detection for downstream processors. |
Pinout & Package
The TPS6281008QWRWYRQ1 is housed in a 3.0 mm × 2.0 mm VQFN package with wettable flanks (RWY, 9-pin), optimized for automated optical inspection (AOI) and high-reliability automotive solder joints.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - MODE/SYNC | Digital control input | Selects PFM/PWM auto-mode (low) or forced PWM (high); accepts external 1.8–4 MHz clock for synchronization without passive components. |
| 2 - VIN | Power input | Main supply input (2.75–6 V); requires local 10 µF ceramic capacitor placed adjacent to pin for high-frequency decoupling. |
| 3 - SW | Power switch node | Internal high-side/low-side MOSFET connection point; drives external inductor and must be routed with minimal loop area to reduce EMI. |
| 4 - GND | Ground reference | Primary power ground; connects directly to thermal pad and must be tied to solid internal ground plane for thermal and noise integrity. |
| 5 - FB | Voltage feedback | Internally connected to 1.1 V reference; no external divider required - simplifies layout and improves accuracy vs adjustable versions. |
| 6 - SS/TR | Soft-start/tracking | Capacitor-to-ground sets startup ramp time; also accepts external voltage for rail tracking during power-up sequencing of multiple supplies. |
| 7 - COMP/FSET | Compensation/frequency set | Resistor-to-ground selects both control-loop compensation and switching frequency (1.8–4 MHz); tied to GND/VIN for fixed 2.25 MHz. |
| 8 - EN | Enable control | Logic-level input with 1.1 V rising threshold; enables user-defined UVLO and precise power-up timing via RC network. |
| 9 - PG | Power-good indicator | Open-drain output asserting high when VOUT is within ±5% of 1.1 V; used for processor reset assertion or system enable handshaking. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation - meets automotive reliability requirements for front-end ADAS modules. |
| Active output discharge | 50 Ω internal discharge path - ensures rapid, controlled VOUT discharge during shutdown, preventing back-powering of downstream circuitry. |
| Functional safety documentation | FIT rate, failure mode analysis, and safety manual available - accelerates ISO 26262 ASIL-B system-level certification. |
| Spread spectrum clocking (SSC) | Optional modulation reduces peak EMI by >10 dB - helps meet CISPR 25 Class 5 radiated emissions limits without added shielding. |
| Wettable flanks package | Side-wettable leads enable AOI-compatible solder joint inspection - critical for zero-defect manufacturing in automotive Tier-1 production. |
Applications
| Infotainment Head Unit | Hybrid Reconfigurable Cluster |
|---|---|
|
Use Scenario: Powers application processor and display interface ICs in centralized head units with dynamic load profiles. IC Role / Device Role / Timing Role: Primary 1.1 V core supply regulator delivering up to 4 A with fast transient response to handle CPU burst loads. Use Value: Maintains ±1% output regulation during 0–4 A load steps, eliminating need for post-regulation LDOs and reducing BOM cost. |
Use Scenario: Supplies reconfigurable graphics controller and instrument cluster MCU requiring precise power sequencing. IC Role / Device Role / Timing Role: Fixed 1.1 V rail generator with SS/TR pin enabling voltage tracking to match auxiliary 3.3 V supply ramp profile. Use Value: Enables glitch-free startup of dual-domain SoCs by synchronizing 1.1 V core ramp with 3.3 V I/O rail via external tracking. |
| Telematics Control Unit | Surround View ECU |
|
Use Scenario: Provides always-on 1.1 V supply to cellular modem baseband processor in low-power telematics gateways. IC Role / Device Role / Timing Role: High-efficiency buck converter operating in PFM mode at microamp loads, transitioning to PWM above 10 mA. Use Value: Achieves >90% efficiency at 100 µA load and >94% at 1 A, extending battery backup runtime during vehicle sleep mode. |
Use Scenario: Delivers clean 1.1 V power to multi-sensor image signal processors (ISP) in surround-view camera fusion ECUs. IC Role / Device Role / Timing Role: Low-noise, spread-spectrum-enabled regulator minimizing switching artifacts in analog video signal paths. Use Value: Reduces conducted EMI by >15 dB in 150 kHz–108 MHz band, preventing interference with MIPI CSI-2 video transmission. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS6281006QWRWYRQ1 | Fixed 1.0 V output, identical 4 A rating, package, and feature set. | Suitable for SoCs requiring 1.0 V core voltage instead of 1.1 V; same thermal and layout footprint. | Select when target ASIC/FPGA specifies 1.0 V nominal core voltage per datasheet. |
| TPS628101HQWRWYRQ1 | Fixed 3.3 V output, same 4 A capability and RWY package, but different feedback reference. | Used for I/O or peripheral rails rather than core logic; requires different output capacitor sizing per VOUT. | Choose for 3.3 V subsystems where 1.1 V version is over-specified; not interchangeable without schematic change. |
Compared with TPS6281006QWRWYRQ1 and TPS628101HQWRWYRQ1, the TPS6281008QWRWYRQ1 provides optimal voltage matching for 1.1 V core domains in modern automotive processors, avoiding inefficient post-regulation while maintaining identical thermal, layout, and functional safety attributes.
Availability
TPS6281008QWRWYRQ1 is available at Aetrix Electronics and suitable for infotainment head units, hybrid reconfigurable clusters, and surround-view ECUs requiring stable component supply across extended automotive product lifecycles.
Supply support for TPS6281008QWRWYRQ1 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 over 50 years of industry experience.
The TPS6281x-Q1 family was designed specifically for high-reliability automotive power rails in ADAS, infotainment, and telematics systems, emphasizing AEC-Q100 compliance, functional safety readiness, and compact high-current density conversion.
FAQ
What is the output voltage of the TPS6281008QWRWYRQ1?
The TPS6281008QWRWYRQ1 delivers a fixed 1.1 V output voltage with ±1% accuracy in PWM mode across temperature and line conditions. This eliminates the need for external feedback resistors and ensures stable core supply for automotive processors requiring precisely regulated 1.1 V rails. The FB pin is internally connected to the 1.1 V reference and must be tied directly to the output.
Does the TPS6281008QWRWYRQ1 support external synchronization?
Yes, the TPS6281008QWRWYRQ1 supports external clock synchronization via the MODE/SYNC pin across 1.8 MHz to 4 MHz. Synchronization requires a resistor from COMP/FSET to GND to enable PLL functionality; if COMP/FSET is tied directly to GND or VIN, external sync is disabled. Lock time to external clock is typically 50 µs.
What package type does the TPS6281008QWRWYRQ1 use?
The TPS6281008QWRWYRQ1 uses a 3.0 mm × 2.0 mm VQFN package with wettable flanks (RWY, 9-pin). This package supports automated optical inspection (AOI) of solder joints and provides low thermal resistance (RθJA = 71.1°C/W) for high-power automotive applications operating up to +125°C ambient.
How does the TPS6281008QWRWYRQ1 handle light-load efficiency?
The TPS6281008QWRWYRQ1 automatically transitions between PFM and PWM modes based on load: it operates in PFM at light loads to maintain >90% efficiency down to 100 µA, then seamlessly switches to fixed-frequency PWM above ~10 mA. This preserves high efficiency across the full 0–4 A load range without requiring manual mode selection.
Is the TPS6281008QWRWYRQ1 qualified for automotive applications?
Yes, the TPS6281008QWRWYRQ1 is AEC-Q100 qualified for automotive applications (Grade 1: –40°C to +125°C ambient), includes functional safety documentation for ISO 26262 system design, and features wettable flanks for enhanced solder joint reliability in automotive manufacturing environments.
TPS6281008QWRWYRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 9-VFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.75V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 1.1V
- Voltage - Output (Max):
- -
- Current - Output:
- 4A
- Frequency - Switching:
- 1.8MHz ~ 4MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 9-VQFN-HR (3x2)
TPS6281008QWRWYRQ1 FAQ
1.How can I place an order for TPS6281008QWRWYRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS6281008QWRWYRQ1 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 TPS6281008QWRWYRQ1 reliable?
The price and inventory of TPS6281008QWRWYRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS6281008QWRWYRQ1 is usually 5 days.
3.What payment methods are accepted for TPS6281008QWRWYRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS6281008QWRWYRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS6281008QWRWYRQ1?
TPS6281008QWRWYRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS6281008QWRWYRQ1 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 TPS6281008QWRWYRQ1?
For technical support, including TPS6281008QWRWYRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS6281008QWRWYRQ1 requirements.
6.How does Aetrix verify that TPS6281008QWRWYRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS6281008QWRWYRQ1 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 TPS6281008QWRWYRQ1 meets industry standards.
7.What is the process for return or replacement of TPS6281008QWRWYRQ1?
All TPS6281008QWRWYRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS6281008QWRWYRQ1, 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 TPS6281008QWRWYRQ1 part is unused and in its original packaging.
Return procedure for TPS6281008QWRWYRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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