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Texas Instruments TPS6281220QWRWYRQ1
- Part No.:
- TPS6281220QWRWYRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 9-VFQFN
- Datasheet:
-
TPS6281220QWRWYRQ1.pdf
- Description:
- IC REG BUCK ADJ 2A 9VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:966
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Product details
Overview
TPS6281220QWRWYRQ1 from Texas Instruments is an AEC-Q100 Grade 1 (–40°C to +125°C) automotive synchronous step-down DC/DC converter delivering up to 2 A continuous output current, with input voltage range 2.75 V to 6 V, adjustable output voltage from 0.6 V to 5.5 V, and ±1% output voltage accuracy in PWM mode. It enables compact, high-efficiency power supplies for infotainment head units and ADAS sensor fusion ECUs.
For engineers reviewing the TPS6281220QWRWYRQ1 datasheet, TPS6281220QWRWYRQ1 pinout, TPS6281220QWRWYRQ1 application, or TPS6281220QWRWYRQ1 equivalent, this page delivers verified technical context, validated pin functions, confirmed spread-spectrum capability, real-world thermal metrics (RθJA = 71.1°C/W), and precise selection guidance against functionally aligned alternatives.
Technical Context
The TPS6281220QWRWYRQ1 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 supports both forced PWM operation and external synchronization (1.8–4 MHz) with sub-50 µs lock time.
This device integrates active output discharge (50 Ω), 100% duty cycle capability, precise ENABLE with user-defined UVLO, and power-good output with window comparator (92–98% rising, 87–93% falling thresholds). Spread spectrum clocking is enabled (per Device Comparison Table), reducing EMI without requiring external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 2 A continuous - supports high-current rails in telematics and cluster applications at elevated ambient temperatures. |
| Input Voltage Range | 2.75 V to 6 V - compatible with automotive battery transients including cold-crank (≥2.75 V) and load-dump (≤6 V). |
| Output Voltage Accuracy | ±1% in PWM mode - ensures stable core voltage regulation for processors and FPGAs without post-regulation. |
| Quiescent Current | 15 µA typical - extends battery life in always-on automotive subsystems such as remote keyless entry receivers. |
| Switching Frequency | Adjustable 1.8–4 MHz - enables compact magnetics and avoids AM band interference; supports external sync for multi-rail coherence. |
| Spread Spectrum | Enabled - reduces peak EMI by spreading switching energy across a frequency band, easing EMC compliance in dense PCB layouts. |
| Thermal Resistance | RθJA = 71.1°C/W - validated for 3 mm × 2 mm VQFN (RWY) package with wettable flanks, enabling reliable 2 A operation on standard 2-layer boards. |
Pinout & Package
TPS6281220QWRWYRQ1 is housed in a 3 mm × 2 mm, 9-pin VQFN package (RWY) with wettable flanks for automated optical inspection (AOI) and robust solder-joint reliability in automotive reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (Pin 8) | Enable control input | Logic-level interface with 1.06–1.15 V rising threshold; supports external RC network for programmable UVLO and sequencing delay. |
| FB (Pin 5) | Feedback voltage sense | Connects to resistive divider for adjustable output; 0.6 V reference enables precise regulation down to sub-1 V core rails. |
| GND (Pin 4) | Power ground | Primary return path for high-current switch node and control circuitry; requires low-inductance connection to minimize noise coupling. |
| MODE/SYNC (Pin 1) | Operating mode select / sync input | Pull-low for PFM/PWM auto-mode; pull-high for forced PWM; accepts 1.8–4 MHz external clock for synchronized multi-converter systems. |
| COMP/FSET (Pin 7) | Loop compensation & frequency set | Resistor-to-GND sets both switching frequency and internal compensation; tied to GND/VIN fixes fS = 2.25 MHz with pre-selected compensation. |
| PG (Pin 9) | Open-drain power-good indicator | Signals valid output (high-Z) when VOUT is within ±5% window; supports system-level rail monitoring and fault logging. |
| SS/TR (Pin 6) | Soft-start / tracking input | Capacitor-to-GND sets startup ramp time; accepts external voltage for supply sequencing and inrush limiting across multiple rails. |
| SW (Pin 3) | Switch node | High-frequency switching point connecting internal HS/LG MOSFETs; requires tight layout with minimal trace length and adjacent ground pour. |
| VIN (Pin 2) | Input power supply | Accepts 2.75–6 V; must be decoupled with ≥5 µF effective capacitance placed adjacent to pin for stability and transient suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Active Output Discharge | 50 Ω internal discharge path - ensures rapid, controlled VOUT ramp-down during shutdown, preventing back-powering of downstream logic. |
| Functional Safety Support | Documentation available for ISO 26262 ASIL-B system integration - includes FIT rate, failure modes, and diagnostic coverage guidance. |
| Wettable Flank Package | RWY VQFN with side-wettable leads - enables automated AOI of solder joints, critical for zero-defect automotive manufacturing requirements. |
| 100% Duty Cycle Mode | Supports dropout operation down to VIN – VOUT ≈ 0.1 V - maintains regulation during deep battery sag (e.g., engine cranking at 6 V → 3.3 V rail). |
| Adjustable Soft Start | Programmable via SS/TR capacitor - limits inrush current to <1.5× IOUT(max), protecting input capacitors and upstream power sources. |
Applications
| Infotainment Head Unit | Hybrid Reconfigurable Cluster |
|---|---|
|
Use Scenario: Powering SoC cores, DDR memory, and display interfaces in centralized vehicle infotainment systems. IC Role / Device Role: Primary 1.1 V/1.2 V/1.8 V buck regulator delivering 2 A with ±1% accuracy and fast load transient response. Use Value: Enables stable processor operation under dynamic video/audio workloads while meeting CISPR 25 Class 5 EMI limits via spread spectrum. |
Use Scenario: Supplying configurable instrument cluster MCU, graphics controller, and backlight drivers with rail sequencing. IC Role / Device Role: Adjustable-output buck converter with SS/TR tracking and precise ENABLE for multi-rail power-up coordination. Use Value: Eliminates need for external sequencers; soft-start and active discharge ensure glitch-free cluster boot and safe shutdown. |
| Telematics Control Unit | Surround View ECU |
|
Use Scenario: Providing clean, low-noise 3.3 V and 1.2 V rails to LTE/C-V2X modems and GNSS receivers in TCUs. IC Role / Device Role: High-efficiency, low-IQ (15 µA) buck converter operating in PFM mode during cellular idle states. Use Value: Extends battery backup runtime during vehicle sleep mode while maintaining fast wake-up response via ENABLE-controlled start-up. |
Use Scenario: Powering image signal processors (ISPs) and MIPI CSI-2 serializers in multi-camera surround-view systems. IC Role / Device Role: 2 A capable buck with 100% duty cycle and thermal shutdown (170°C) for sustained operation near heat-generating camera modules. Use Value: Maintains ISP voltage stability during extended video capture in hot ambient conditions (TA = 125°C) without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62812QWRWYRQ1 | No spread spectrum; otherwise identical pinout, specs, and package. | Lacks EMI reduction feature - suitable only where board-level filtering suffices and spread spectrum is not required for certification. | Select TPS6281220QWRWYRQ1 when CISPR 25 Class 5 compliance is mandatory; choose TPS62812QWRWYRQ1 to reduce cost if EMI margin exists. |
| TPS62902QRGTRQ1 | Higher efficiency (95% typ. @ 1 A), lower IQ (1.5 µA), but 1.5 A max output and different pinout (12-pin QFN). | Not pin-compatible; requires PCB redesign; optimized for ultra-low-power always-on domains rather than high-current processing rails. | Choose TPS62902QRGTRQ1 only for new designs prioritizing standby current over output current; retain TPS6281220QWRWYRQ1 for existing 2 A layouts. |
Compared with TPS62812QWRWYRQ1, the TPS6281220QWRWYRQ1 adds spread spectrum for EMI mitigation without sacrificing size or thermal performance; versus TPS62902QRGTRQ1, it provides 33% higher output current in the same footprint but trades off ultra-low IQ for automotive-grade robustness and integrated sequencing features.
Availability
TPS6281220QWRWYRQ1 is available at Aetrix Electronics and suitable for infotainment head units, hybrid reconfigurable clusters, and surround-view ECUs requiring stable component supply, AEC-Q100 qualification, and long-term automotive lifecycle support.
Supply support for TPS6281220QWRWYRQ1 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 and embedded processing technologies, with decades of automotive IC design expertise and rigorous AEC-Q100 validation infrastructure.
The TPS6281x-Q1 product line was engineered specifically for automotive power management in safety-critical ADAS and infotainment systems, emphasizing thermal resilience, EMI control, and functional safety documentation support.
FAQ
What is the maximum output current capability of the TPS6281220QWRWYRQ1?
The TPS6281220QWRWYRQ1 delivers up to 2 A continuous output current across its full operating temperature range (–40°C to +125°C ambient), validated with the 3 mm × 2 mm RWY package and standard PCB layout per TI's thermal data (RθJA = 71.1°C/W). This rating assumes proper input/output capacitance, inductor selection, and airflow per Section 6.4 of the datasheet. The TPS6281220QWRWYRQ1 achieves this with low RDS(on) (37 mΩ HS / 15 mΩ LS) to minimize conduction loss.
Does the TPS6281220QWRWYRQ1 support spread spectrum clocking?
Yes, the TPS6281220QWRWYRQ1 has spread spectrum clocking (SSC) enabled by default, as confirmed in the Device Comparison Table where "SPREAD SPECTRUM CLOCKING (SSC)" is marked "ON" for this part number. This feature reduces peak radiated emissions without external components and is active in both PWM and PFM modes, aiding CISPR 25 Class 5 compliance in automotive ECU designs.
What package type and dimensions does the TPS6281220QWRWYRQ1 use?
The TPS6281220QWRWYRQ1 uses a 3 mm × 2 mm, 9-pin VQFN package with wettable flanks (RWY), specified in Section 12 of the datasheet. This package supports automated optical inspection (AOI) and offers RθJA = 71.1°C/W, enabling reliable 2 A operation on standard FR-4 PCBs. Pin pitch is 0.4 mm, and the package height is 0.5 mm - compatible with fine-pitch automotive assembly processes.
Can the TPS6281220QWRWYRQ1 be synchronized to an external clock?
Yes, the TPS6281220QWRWYRQ1 supports external synchronization via the MODE/SYNC pin (Pin 1) across 1.8–4 MHz, with lock time under 50 µs. Synchronization requires a resistor from COMP/FSET to GND - tying COMP/FSET to GND or VIN disables sync capability. The device uses a PLL to transition between internal and external clocks dynamically, enabling phase-coherent multi-rail systems in ADAS domain controllers.
What is the output voltage accuracy specification for the TPS6281220QWRWYRQ1?
The TPS6281220QWRWYRQ1 guarantees ±1% output voltage accuracy in PWM mode across –40°C to +125°C junction temperature, with VIN ≥ VOUT + 1 V. This applies to adjustable configurations using the FB pin and 0.6 V internal reference. In PFM mode, accuracy degrades to ±2% (VOUT ≥ 1.5 V) or ±2.5% (1 V ≤ VOUT < 1.5 V), per Section 6.5 Electrical Characteristics.
TPS6281220QWRWYRQ1 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:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.75V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 5.5V
- 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)
TPS6281220QWRWYRQ1 FAQ
1.How can I place an order for TPS6281220QWRWYRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS6281220QWRWYRQ1 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 TPS6281220QWRWYRQ1 reliable?
The price and inventory of TPS6281220QWRWYRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS6281220QWRWYRQ1 is usually 5 days.
3.What payment methods are accepted for TPS6281220QWRWYRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS6281220QWRWYRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS6281220QWRWYRQ1?
TPS6281220QWRWYRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS6281220QWRWYRQ1 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 TPS6281220QWRWYRQ1?
For technical support, including TPS6281220QWRWYRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS6281220QWRWYRQ1 requirements.
6.How does Aetrix verify that TPS6281220QWRWYRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS6281220QWRWYRQ1 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 TPS6281220QWRWYRQ1 meets industry standards.
7.What is the process for return or replacement of TPS6281220QWRWYRQ1?
All TPS6281220QWRWYRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS6281220QWRWYRQ1, 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 TPS6281220QWRWYRQ1 part is unused and in its original packaging.
Return procedure for TPS6281220QWRWYRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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