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Texas Instruments TPS6281326QWRWYRQ1
- Part No.:
- TPS6281326QWRWYRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 9-VFQFN
- Datasheet:
-
TPS6281326QWRWYRQ1.pdf
- Description:
- IC REG BUCK 1V 3A 9VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
TPS6281326QWRWYRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive synchronous step-down DC/DC converter delivering 3 A continuous output current, fixed 1.0 V output voltage, 1.8–4 MHz adjustable switching frequency, and ±1% feedback voltage accuracy in PWM mode. It operates across 2.75 V to 6 V input and supports forced PWM or PFM operation in infotainment head units and ADAS sensor fusion ECUs.
For engineers reviewing the TPS6281326QWRWYRQ1 datasheet, TPS6281326QWRWYRQ1 pinout, TPS6281326QWRWYRQ1 application, or TPS6281326QWRWYRQ1 equivalent, key selection criteria include its wettable-flank VQFN-9 package, active output discharge, spread spectrum clocking option, precise ENABLE threshold for sequencing, and 15 µA quiescent current in light-load PFM mode.
Technical Context
The TPS6281326QWRWYRQ1 implements peak current mode control with internal compensation selectable via resistor on COMP/FSET, enabling stable regulation with ceramic output capacitors as low as 27 µF (for VOUT ≥ 3.3 V) or 47 µF (for 3 A versions). Its MODE/SYNC pin supports external clock synchronization from 1.8 MHz to 4 MHz or logic-controlled PWM/PFM mode selection.
It integrates high-side (37–60 mΩ) and low-side (15–35 mΩ) MOSFETs optimized for high ambient temperature operation, features a dedicated SS/TR pin for soft-start timing or voltage tracking, and includes a window-comparator-based power-good (PG) output with 40 µs deglitch time and open-drain configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 3 A continuous - supports high-power rails in automotive clusters and telematics without thermal derating at +125°C ambient. |
| Output Voltage | Fixed 1.0 V - eliminates external feedback resistors; matches core voltage requirements of SoCs like TI Jacinto 7 or NXP S32G. |
| Input Voltage Range | 2.75 V to 6 V - compatible with 3.3 V, 5 V, and battery-backed automotive supplies including cold-crank down to 2.75 V. |
| Quiescent Current | 15 µA typical - enables >10-year battery standby in always-on ADAS modules with minimal parasitic drain. |
| Switching Frequency | 1.8–4 MHz adjustable - allows EMI optimization and compact magnetics; supports synchronization to avoid beat frequencies in multi-rail systems. |
| Feedback Accuracy | ±1% in PWM mode - ensures tight regulation for sensitive processor cores, reducing need for margin in system-level voltage tolerance budgets. |
| Thermal Resistance | RθJA = 71.1 °C/W - enables 3 A operation in 3 mm × 2 mm VQFN without forced airflow when PCB copper area meets recommended layout guidelines. |
Pinout & Package
The TPS6281326QWRWYRQ1 is housed in a 3 mm × 2 mm VQFN package with wettable flanks (RWY, 9-pin), supporting automated optical inspection (AOI) and improving solder joint reliability in automotive reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| MODE/SYNC | Digital control input | Selects PFM/PWM mode (low/high) or accepts external sync clock (1.8–4 MHz); requires pull-up/down; no passive components needed for sync. |
| SW | Power switch node | Connects to internal high-side/low-side MOSFETs; requires low-inductance path to inductor and input/output capacitors. |
| FB | Voltage feedback input | Internally tied to 1.0 V reference; must be connected directly to output for fixed-VOUT operation - no external divider required. |
| VIN | Main power input | Accepts 2.75–6 V; requires local 10 µF ceramic capacitor placed adjacent to pin and GND for high-frequency decoupling. |
| GND | Power and signal ground | Common return for VIN, SW, PG, EN, and all control pins; must be solid thermal pad connection per layout guidelines. |
| EN | Enable control | Logic-compatible input with 1.06–1.15 V rising threshold; enables programmable UVLO and power-up sequencing via RC network. |
| PG | Power-good indicator | Open-drain output asserting high when VOUT is within ±5% of 1.0 V (95–107% window); debounced with 40 µs filter. |
| SS/TR | Soft-start/tracking | Capacitor-to-GND sets ramp time; also accepts external voltage for rail tracking during power-up or fault recovery. |
| COMP/FSET | Compensation & frequency set | Resistor-to-GND selects both loop compensation and switching frequency (1.8–4 MHz); tied to GND/VIN for fixed 2.25 MHz. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation - meets automotive power supply reliability requirements for front-end ECUs. |
| Active output discharge | 50 Ω internal discharge path - ensures rapid, controlled VOUT ramp-down during shutdown, preventing back-powering of downstream circuitry. |
| Spread spectrum clocking (SSC) | Optional modulation reduces peak EMI by spreading energy across 1.8–4 MHz band - simplifies compliance with CISPR 25 Class 5 radiated emissions limits. |
| 100% duty cycle capability | Supports dropout operation down to VOUT ≈ VIN − 0.1 V - enables seamless regulation during cold-crank transients where input dips near output voltage. |
| Wettable flanks package | RWY VQFN-9 with side-wettable leads - enables AOI verification of solder joints, critical for zero-defect manufacturing in safety-critical automotive applications. |
Applications
| Infotainment Head Unit | Hybrid Reconfigurable Cluster |
|---|---|
Use Scenario: Powers application processor, display interface, and audio codec in centralized vehicle infotainment systems requiring low-noise, high-efficiency 1.0 V core supply. IC Role / Device Role / Timing Role: Primary 3 A buck regulator delivering tightly regulated 1.0 V core voltage with fast transient response to dynamic CPU load changes. Use Value: ±1% output accuracy and 15 µA quiescent current extend battery runtime in accessory-off state while maintaining SoC stability during burst processing. | Use Scenario: Supplies configurable digital cluster SoC (e.g., Renesas R-Car H3) with 1.0 V core rail in vehicles with mixed analog/digital gauge layouts. IC Role / Device Role / Timing Role: Fixed-output buck converter providing sequenced, monitored 1.0 V supply synchronized with other rails via MODE/SYNC pin. Use Value: Precise ENABLE threshold and PG output enable deterministic power-up sequencing and fault detection across multiple display subsystems. |
| Telematics Control Unit | Surround View ECU |
Use Scenario: Generates 1.0 V core voltage for LTE/C-V2X modem SoCs operating in thermally constrained enclosures behind dashboard panels. IC Role / Device Role / Timing Role: High-current, thermally robust DC/DC converter delivering 3 A continuously at +105°C ambient with minimal heatsinking. Use Value: Low RDS(on) MOSFETs (37/15 mΩ) and 71.1 °C/W RθJA enable full-rated output without derating in sealed TCUs. | Use Scenario: Powers image signal processors (ISPs) and FPGA fabric in surround-view camera fusion ECUs requiring clean, low-ripple 1.0 V supply. IC Role / Device Role / Timing Role: EMI-optimized buck converter using spread spectrum clocking and 2.25 MHz fixed frequency to minimize interference with high-speed MIPI video links. Use Value: SSC and wettable-flank package reduce radiated emissions and improve field-reliability in multi-camera sensor hubs exposed to vibration and thermal cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS628130AQWRWYRQ1 | Fixed 1.2 V output; identical 3 A rating, package, and feature set. | Targets SoCs requiring 1.2 V core (e.g., older ARM Cortex-A series), not 1.0 V logic domains. | Select when system architecture mandates 1.2 V instead of 1.0 V - no layout change needed due to pin compatibility. |
| TPS6281220QWRWYRQ1 | 2 A output, same 1.0 V fixed output, includes spread spectrum clocking. | Suitable for lower-power clusters or gateway modules where 2 A suffices and cost reduction is prioritized. | Choose for BOM cost optimization in non-performance-critical 1.0 V rails; shares footprint but derates output current by 33%. |
Compared with TPS628130AQWRWYRQ1 and TPS6281220QWRWYRQ1, the TPS6281326QWRWYRQ1 uniquely delivers 3 A at precisely 1.0 V with full automotive qualification - making it optimal for next-gen ADAS SoCs where core voltage tolerance and current headroom are tightly specified.
Availability
TPS6281326QWRWYRQ1 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 production lifecycles.
Supply support for TPS6281326QWRWYRQ1 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 ICs, with decades of experience in high-reliability power management solutions.
The TPS6281x-Q1 product line was designed specifically for automotive infotainment and ADAS applications demanding AEC-Q100 qualification, low EMI, high efficiency at light loads, and robust thermal performance in compact form factors.
FAQ
What is the output voltage of the TPS6281326QWRWYRQ1?
The TPS6281326QWRWYRQ1 provides a fixed 1.0 V output voltage. This is achieved internally - the FB pin is pre-connected to the 1.0 V reference, eliminating the need for external feedback resistors. The device maintains ±1% accuracy in PWM mode across –40°C to +125°C ambient temperature, making it suitable for core power delivery to modern automotive SoCs requiring precise 1.0 V rails.
Does the TPS6281326QWRWYRQ1 support external clock synchronization?
Yes, the TPS6281326QWRWYRQ1 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; tying COMP/FSET to GND or VIN disables sync capability. The device locks to the external clock within 50 µs and supports phase-shifted operation when cascading multiple converters using SW as a sync source.
What package type does the TPS6281326QWRWYRQ1 use?
The TPS6281326QWRWYRQ1 uses a 3 mm × 2 mm VQFN package with wettable flanks (RWY, 9-pin). This package enables automated optical inspection of solder joints and improves thermal dissipation through the exposed thermal pad. It is pin-compatible with other TPS6281x-Q1 variants, allowing design reuse across 1 A to 4 A versions without layout modification.
How does the TPS6281326QWRWYRQ1 handle light-load efficiency?
The TPS6281326QWRWYRQ1 automatically transitions between forced PWM and PFM modes based on load. In PFM mode, switching frequency decreases linearly with load to maintain >85% efficiency down to 1 mA output current. Its 15 µA typical quiescent current minimizes standby power loss - critical for always-on ADAS modules powered from vehicle battery during ignition-off states.
Is the TPS6281326QWRWYRQ1 qualified for automotive applications?
Yes, the TPS6281326QWRWYRQ1 is AEC-Q100 Grade 1 qualified for automotive applications, rated for operation from –40°C to +125°C ambient temperature. It includes functional safety documentation support, thermal shutdown at 170°C with 15°C hysteresis, and robust ESD protection (±2000 V HBM). These features meet stringent reliability requirements for infotainment, telematics, and ADAS systems deployed in production vehicles.
TPS6281326QWRWYRQ1 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):
- 1V
- Voltage - Output (Max):
- -
- Current - Output:
- 3A
- Frequency - Switching:
- 1.8MHz ~ 4MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 9-VQFN-HR (3x2)
TPS6281326QWRWYRQ1 FAQ
1.How can I place an order for TPS6281326QWRWYRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS6281326QWRWYRQ1 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 TPS6281326QWRWYRQ1 reliable?
The price and inventory of TPS6281326QWRWYRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS6281326QWRWYRQ1 is usually 5 days.
3.What payment methods are accepted for TPS6281326QWRWYRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS6281326QWRWYRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS6281326QWRWYRQ1?
TPS6281326QWRWYRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS6281326QWRWYRQ1 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 TPS6281326QWRWYRQ1?
For technical support, including TPS6281326QWRWYRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS6281326QWRWYRQ1 requirements.
6.How does Aetrix verify that TPS6281326QWRWYRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS6281326QWRWYRQ1 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 TPS6281326QWRWYRQ1 meets industry standards.
7.What is the process for return or replacement of TPS6281326QWRWYRQ1?
All TPS6281326QWRWYRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS6281326QWRWYRQ1, 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 TPS6281326QWRWYRQ1 part is unused and in its original packaging.
Return procedure for TPS6281326QWRWYRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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