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Texas Instruments TPS6281228QWRWYRQ1
- Part No.:
- TPS6281228QWRWYRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 9-VFQFN
- Datasheet:
-
TPS6281228QWRWYRQ1.pdf
- Description:
- IC REG BUCK 1.1V 2A 9VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,790
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Product details
Overview
TPS6281228QWRWYRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive synchronous step-down DC/DC converter delivering 2 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 active output discharge. 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 TPS6281228QWRWYRQ1 datasheet, TPS6281228QWRWYRQ1 pinout, TPS6281228QWRWYRQ1 application, or TPS6281228QWRWYRQ1 equivalent, key selection criteria include its wettable-flank VQFN-9 package, spread-spectrum clocking option, precise ENABLE threshold for sequencing, 15 µA quiescent current, and integrated power-good window comparator with 40 µs deglitch time.
Technical Context
The TPS6281228QWRWYRQ1 implements peak current mode control with internally compensated loop and three selectable compensation settings-configured via resistor on COMP/FSET-to match output capacitance (15–470 µF) and optimize transient response. Its MODE/SYNC pin enables external synchronization (1.8–4 MHz) or PFM/PWM mode selection.
It integrates low-RDS(on) MOSFETs (HS: 37–60 mΩ, LS: 15–35 mΩ at VIN ≥ 5 V), supports 100% duty cycle operation, and features a dedicated SS/TR pin for soft-start timing or voltage tracking-enabling precise rail sequencing without external circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 2 A continuous - supports high ambient temperature operation in automotive ECU power rails. |
| Output Voltage | Fixed 1.1 V - eliminates external feedback resistors; matches core voltage requirements of SoCs and FPGAs. |
| Input Voltage Range | 2.75 V to 6 V - compatible with 3.3 V, 5 V, and battery-backed automotive supply rails. |
| Switching Frequency | 1.8 MHz to 4 MHz adjustable - enables EMI optimization and compact filter design with small inductors (0.25–0.47 µH). |
| Quiescent Current | 15 µA typical - extends battery life in always-on automotive subsystems like telematics. |
| Feedback Accuracy | ±1% in PWM mode - ensures stable core voltage regulation under dynamic load conditions. |
| Thermal Rating | Junction temp –40°C to +150°C - meets AEC-Q100 Grade 1 requirements for under-hood and cabin applications. |
Pinout & Package
The TPS6281228QWRWYRQ1 is housed in a 3 mm × 2 mm VQFN package with wettable flanks (RWY, 9-pin), enabling reliable automated optical inspection (AOI) and solder joint quality verification in automotive production.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN | Enable input | Logic-controlled startup with 1.06–1.15 V rising threshold; supports programmable UVLO and precise power sequencing. |
| FB | Feedback input | Internally connected to 1.1 V reference; must be tied directly to output for fixed-voltage operation. |
| GND | Power ground | Primary return path for high-current switching and analog circuitry; requires low-inductance PCB layout. |
| MODE/SYNC | Mode control / sync input | Selects PFM/PWM (low) or forced PWM (high); accepts external 1.8–4 MHz clock for synchronized multi-rail systems. |
| COMP/FSET | Compensation & frequency set | Resistor-to-GND sets both switching frequency and internal compensation; tied to GND/VIN for fixed 2.25 MHz. |
| PG | Power-good open-drain output | Indicates regulated output within ±5% window (92–98% rise, 87–93% fall); 40 µs deglitch prevents false toggling. |
| SS/TR | Soft-start / tracking input | Capacitor-to-GND sets ramp time; also accepts external voltage for rail tracking during power-up sequencing. |
| SW | Switch node | High-frequency switching point connecting internal HS/LS MOSFETs; requires tight layout to minimize EMI and ringing. |
| VIN | Input supply | Accepts 2.75–6 V; requires local 5–10 µF ceramic capacitor placed adjacent to pin for high-frequency decoupling. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation - suitable for engine bay and dashboard electronics without derating. |
| Active output discharge | 50 Ω internal discharge path - ensures rapid, controlled VOUT decay during shutdown, preventing back-powering of downstream logic. |
| 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. |
| Precise ENABLE threshold | Rising edge at 1.1 V ±0.05 V - enables robust RC-delayed startup and user-defined undervoltage lockout without external comparators. |
| Wettable flanks package | RWY (VQFN-9) with side-wettable leads - supports automated AOI for zero-defect manufacturing in automotive Tier 1 supply chains. |
Applications
| Infotainment Head Unit | ADAS Sensor Fusion ECU |
|---|---|
|
Use Scenario: Powers application processor cores and DDR memory interfaces in centralized infotainment systems requiring clean, tightly regulated 1.1 V rails. IC Role / Device Role / Timing Role: Primary point-of-load (POL) regulator delivering 2 A at 1.1 V with <1% output error and fast transient response. Use Value: Enables stable SoC operation under burst loads (e.g., video decode), while 15 µA IQ minimizes standby drain on vehicle battery. |
Use Scenario: Supplies vision processor and radar pre-processing ASICs in surround-view camera fusion modules. IC Role / Device Role / Timing Role: High-efficiency, low-noise buck converter supporting 1.1 V core voltage with precise sequencing relative to I/O and analog rails. Use Value: Active discharge prevents latch-up during hot-plug events; spread spectrum reduces interference with RF-sensitive camera sensors. |
| Telematics Control Unit | Hybrid Instrument Cluster |
|
Use Scenario: Provides always-on 1.1 V supply to cellular modem baseband processors and GNSS receivers in connected car gateways. IC Role / Device Role / Timing Role: Low-quiescent-current step-down regulator maintaining regulation during ignition-off sleep modes. Use Value: 15 µA IQ extends battery hold-up time beyond 30 days; PG output signals valid rail status to MCU watchdog timer. |
Use Scenario: Delivers 1.1 V core power to reconfigurable digital cluster SoCs that switch between analog and digital display modes. IC Role / Device Role / Timing Role: Sequenced POL regulator synchronized via MODE/SYNC pin to coordinate with 3.3 V and 5 V rails. Use Value: External synchronization avoids beat frequencies; SS/TR pin enables voltage tracking for glitch-free mode transitions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS6281220QWRWYRQ1 | Same 2 A rating and RWY package, but includes spread-spectrum clocking (SSC); fixed 1.1 V output. | Better EMI performance in RF-dense environments (e.g., V2X modules); identical thermal and layout footprint. | Select when CISPR 25 Class 5 compliance is required without external filtering. |
| TPS6281208QWRWYRQ1 | Same 2 A rating and RWY package, no SSC, fixed 1.1 V output - matches TPS6281228QWRWYRQ1 except for SSC enablement. | No EMI reduction feature; otherwise identical electrical behavior and pin compatibility. | Select when SSC is unnecessary and cost optimization is prioritized over EMI margin. |
Compared with TPS6281228QWRWYRQ1, TPS6281220QWRWYRQ1 adds spread-spectrum capability for stricter EMI environments, while TPS6281208QWRWYRQ1 omits SSC entirely - offering identical regulation and sequencing functionality at lower BOM cost where EMI is not critical.
Availability
TPS6281228QWRWYRQ1 is available at Aetrix Electronics and suitable for infotainment head units, ADAS sensor fusion ECUs, and telematics control units requiring stable component supply with full AEC-Q100 traceability and automotive-grade lifecycle support.
Supply support for TPS6281228QWRWYRQ1 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 automotive qualification expertise and functional safety documentation support.
The TPS6281x-Q1 product line delivers high-efficiency, AEC-Q100-qualified DC/DC converters optimized for infotainment, ADAS, and body electronics - emphasizing low IQ, precise sequencing, and robust EMI performance in harsh automotive environments.
FAQ
What is the output voltage of the TPS6281228QWRWYRQ1?
The TPS6281228QWRWYRQ1 provides a fixed 1.1 V output voltage. This is achieved via internal feedback circuitry - the FB pin must be connected directly to the output node, eliminating the need for external resistor dividers. The device maintains ±1% accuracy in PWM mode across –40°C to +125°C ambient temperature, making it suitable for powering SoC cores and FPGA I/O banks requiring tight voltage tolerance.
Does the TPS6281228QWRWYRQ1 support external synchronization?
Yes, the TPS6281228QWRWYRQ1 supports external clock synchronization via its MODE/SYNC pin, accepting input frequencies from 1.8 MHz to 4 MHz. Synchronization is only enabled when a resistor is connected from COMP/FSET to GND - if COMP/FSET is tied directly to VIN or GND, external sync is disabled. The internal PLL allows seamless transition between internal and external clocks during operation, enabling phase-shifted multi-converter designs.
What package type does the TPS6281228QWRWYRQ1 use?
The TPS6281228QWRWYRQ1 uses a 3 mm × 2 mm VQFN package with wettable flanks (RWY, 9-pin). This package supports automated optical inspection (AOI) of solder joints - a critical requirement for automotive manufacturing. Its thermal metrics include RθJA = 71.1°C/W and RθJB = 16.4°C/W, enabling reliable 2 A operation on standard 2-layer PCBs with adequate copper area.
How does the TPS6281228QWRWYRQ1 handle light-load efficiency?
The TPS6281228QWRWYRQ1 automatically transitions between forced PWM and PFM (pulse-frequency modulation) modes based on load. When the MODE/SYNC pin is pulled low, it enters PFM mode at light loads - reducing switching frequency linearly to maintain >85% efficiency down to 1 mA. In PWM mode, quiescent current remains at 15 µA typical, ensuring minimal standby loss in always-on automotive subsystems.
Is the TPS6281228QWRWYRQ1 qualified for automotive applications?
Yes, the TPS6281228QWRWYRQ1 is AEC-Q100 qualified for automotive applications (Grade 1: –40°C to +125°C ambient). It includes functional safety documentation support, thermal shutdown at 170°C with 15°C hysteresis, and robust ESD protection (±2000 V HBM). All specifications - including output accuracy, current limit, and timing parameters - are guaranteed across the full automotive temperature range and lifetime reliability testing.
TPS6281228QWRWYRQ1 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:
- 2A
- 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)
TPS6281228QWRWYRQ1 FAQ
1.How can I place an order for TPS6281228QWRWYRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS6281228QWRWYRQ1 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 TPS6281228QWRWYRQ1 reliable?
The price and inventory of TPS6281228QWRWYRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS6281228QWRWYRQ1 is usually 5 days.
3.What payment methods are accepted for TPS6281228QWRWYRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS6281228QWRWYRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS6281228QWRWYRQ1?
TPS6281228QWRWYRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS6281228QWRWYRQ1 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 TPS6281228QWRWYRQ1?
For technical support, including TPS6281228QWRWYRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS6281228QWRWYRQ1 requirements.
6.How does Aetrix verify that TPS6281228QWRWYRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS6281228QWRWYRQ1 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 TPS6281228QWRWYRQ1 meets industry standards.
7.What is the process for return or replacement of TPS6281228QWRWYRQ1?
All TPS6281228QWRWYRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS6281228QWRWYRQ1, 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 TPS6281228QWRWYRQ1 part is unused and in its original packaging.
Return procedure for TPS6281228QWRWYRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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