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Texas Instruments TPS6281020QWRWYRQ1
- Part No.:
- TPS6281020QWRWYRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 9-VFQFN
- Datasheet:
-
TPS6281020QWRWYRQ1.pdf
- Description:
- IC REG BUCK ADJ 4A 9VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:8,790
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Product details
Overview
TPS6281020QWRWYRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive synchronous step-down DC/DC converter delivering up to 4 A continuous output current, operating from 2.75 V to 6 V input, with adjustable 1.8–4 MHz switching frequency and ±1% output voltage accuracy in PWM mode. It integrates active output discharge, spread spectrum clocking, and precise ENABLE for sequencing in infotainment and ADAS power rails.
For engineers reviewing the TPS6281020QWRWYRQ1 datasheet, TPS6281020QWRWYRQ1 pinout, TPS6281020QWRWYRQ1 application, or TPS6281020QWRWYRQ1 equivalent, key selection criteria include its 4 A output capability, wettable-flank VQFN-9 package, spread-spectrum enablement for EMI reduction, and functional safety documentation support for ISO 26262-compliant designs.
Technical Context
The TPS6281020QWRWYRQ1 uses peak current mode control with internal compensation selectable via resistor on COMP/FSET, supporting three output capacitance ranges (min 27 µF to max 470 µF). Its MODE/SYNC pin enables either forced PWM or automatic PFM/PWM transition, and supports external synchronization from 1.8–4 MHz with <50 µs lock time.
It features a precision ENABLE input with 1.1 V rising threshold and 100 mV hysteresis for programmable UVLO and rail sequencing, plus a dedicated SS/TR pin enabling soft-start ramp control or voltage tracking-critical for multi-rail systems requiring controlled power-up timing and inrush limiting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 4 A continuous - supports high-power automotive SoCs and sensor fusion ECUs without thermal derating at +125°C ambient. |
| Input Voltage Range | 2.75 V to 6 V - compatible with 3.3 V, 5 V, and battery-backed automotive supplies including cold-crank conditions down to 2.75 V. |
| Switching Frequency | 1.8 MHz to 4 MHz adjustable - enables compact filter design with sub-1 µH inductors and avoids AM band interference via spread-spectrum option. |
| Feedback Accuracy | ±1% in PWM mode - ensures stable 3.3 V or 1.2 V core rails for processors and FPGAs without post-regulation. |
| Quiescent Current | 15 µA typical - extends battery life in always-on telematics modules during sleep mode. |
| Thermal Shutdown | 170°C with 15°C hysteresis - protects against sustained overload while allowing transient 4 A bursts in high-ambient environments. |
| Power-Good Output | Window comparator with 92–98% (UVP) and 107–113% (OVP) thresholds - provides reliable system-level fault detection for downstream logic. |
Pinout & Package
The TPS6281020QWRWYRQ1 is housed in a 3 mm × 2 mm VQFN package with wettable flanks (RWY, 9-pin), optimized for automated optical inspection (AOI) and high-density automotive PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (Pin 8) | Enable input | Logic-controlled startup with 1.1 V rising threshold; enables precise undervoltage lockout and power-rail sequencing via external resistor divider. |
| FB (Pin 5) | Feedback input | Connects to resistive divider for adjustable output; 0.6 V reference enables 0.6–5.5 V regulation with ±1% accuracy in PWM mode. |
| 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) | Mode control / sync input | Selects PFM/PWM or forced PWM; accepts external 1.8–4 MHz clock for synchronized multi-converter operation without phase-shift components. |
| COMP/FSET (Pin 7) | Compensation & frequency set | Resistor-to-GND sets both switching frequency and internal loop compensation-critical for stability across 27–470 µF output capacitance ranges. |
| PG (Pin 9) | Power-good open-drain output | Signals valid output within ±3% window; drives pull-up for system reset or enable of downstream regulators in cascaded power trees. |
| SS/TR (Pin 6) | Soft-start / tracking input | Capacitor-to-GND sets startup ramp time; also accepts external voltage for rail tracking-enables coordinated sequencing of multiple TPS6281x-Q1 devices. |
| SW (Pin 3) | Switch node | High-frequency drain connection of internal high-side/low-side MOSFETs; requires tight layout with minimal loop area to reduce EMI and voltage spikes. |
| VIN (Pin 2) | Input supply | Accepts 2.75–6 V; must be decoupled with ≥10 µF ceramic capacitor placed adjacent to pin to suppress high-frequency ripple and ensure stable operation. |
Key Features
| Feature | Design Value |
|---|---|
| Spread spectrum clocking | Reduces peak EMI by >10 dB across 100 kHz–1 GHz range-meets CISPR 25 Class 5 requirements without added shielding or filtering. |
| Active output discharge | 50 Ω internal discharge path ensures rapid VOUT collapse during shutdown-prevents back-powering of sensitive downstream circuitry. |
| 100% duty cycle mode | Maintains regulation down to VIN – VDROP (≈2.75 V), enabling operation during automotive cold-crank when input dips near output voltage. |
| Wettable flanks package | Enables reliable solder joint inspection via AOI-critical for zero-defect automotive manufacturing and long-term field reliability. |
| Functional safety documentation | Includes FIT rate, failure modes, and diagnostic coverage data-accelerates ASIL-B system-level FMEDA and safety case development. |
Applications
| Infotainment Head Unit | Hybrid Reconfigurable Cluster |
|---|---|
Use Scenario: Powers application processor, display interface, and audio codec in central infotainment module requiring clean, sequenced 1.2 V, 3.3 V, and 5 V rails. IC Role / Device Role / Timing Role: Primary buck regulator delivering 4 A at 1.2 V for SoC core domain with precise soft-start and tracking to coordinate with I/O and memory rails. Use Value: Spread spectrum and low 15 µA quiescent current meet stringent EMC and battery-drain requirements for EU-type-approved head units. | Use Scenario: Supplies reconfigurable instrument cluster with digital TFT display, microcontroller, and CAN transceivers under varying thermal loads and vibration conditions. IC Role / Device Role / Timing Role: High-current 3.3 V rail generator with active discharge and power-good signaling to manage display backlight enable and MCU wake-up sequence. Use Value: AEC-Q100 Grade 1 rating and 170°C thermal shutdown ensure uninterrupted operation at +125°C junction temperature in dashboard-mounted enclosures. |
| Telematics Control Unit | Surround View ECU |
Use Scenario: Provides always-on 3.3 V and 1.2 V supplies for LTE modem, GNSS receiver, and secure element in cellular-connected vehicle gateways. IC Role / Device Role / Timing Role: Dual-rail controller using SS/TR pin for voltage tracking between modem core and RF front-end, minimizing inrush during boot. Use Value: 4 A capability supports burst transmit currents; 1.8–4 MHz adjustability allows optimization for size vs. efficiency in space-constrained TCUs. | Use Scenario: Powers image signal processors and high-speed SerDes interfaces in 4-camera surround-view systems requiring low-noise, tightly regulated supplies. IC Role / Device Role / Timing Role: Main 1.2 V core supply with ±1% accuracy and fast load-transient response (<10 µs recovery) to handle dynamic ISP workload changes. Use Value: Peak current mode control and internal compensation eliminate need for external type-II/III compensation networks-reducing BOM count and layout complexity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62810QWRWYRQ1 | No spread spectrum clocking; identical 4 A rating, 2.75–6 V input, and VQFN-9 package. | Suitable where EMI is managed externally or less stringent (e.g., non-critical interior modules). | Select TPS62810QWRWYRQ1 if spread spectrum is unnecessary and cost minimization is prioritized. |
| TPS62903RTER | Non-automotive, 3 A, 3–18 V input, 1.8–4 MHz sync, no AEC-Q100 qualification. | Applicable only in industrial or consumer designs lacking automotive reliability or safety requirements. | Choose TPS62903RTER only for non-automotive prototypes or cost-sensitive non-safety systems. |
Compared with TPS62810QWRWYRQ1, the TPS6281020QWRWYRQ1 adds spread spectrum for EMI compliance without changing footprint or control interface; versus TPS62903RTER, it delivers higher current, automotive qualification, and integrated safety documentation-making it the sole qualified choice for production ADAS and infotainment ECUs.
Availability
TPS6281020QWRWYRQ1 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 TPS6281020QWRWYRQ1 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 deep expertise in automotive-grade power management ICs.
The TPS6281x-Q1 product line was designed specifically for high-reliability automotive power conversion in infotainment, ADAS, and telematics systems-emphasizing AEC-Q100 compliance, functional safety readiness, and EMI robustness.
FAQ
What is the maximum continuous output current of the TPS6281020QWRWYRQ1?
The TPS6281020QWRWYRQ1 delivers up to 4 A continuous output current across the full AEC-Q100 Grade 1 temperature range (–40°C to +125°C ambient), enabled by low RDS(ON) MOSFETs (37 mΩ high-side, 15 mΩ low-side at VIN ≥ 5 V) and optimized thermal design in the RWY package.
Does the TPS6281020QWRWYRQ1 support external frequency synchronization?
Yes, the TPS6281020QWRWYRQ1 supports external synchronization via the MODE/SYNC pin over 1.8–4 MHz, with lock time under 50 µs. This requires a resistor from COMP/FSET to GND; synchronization is disabled if COMP/FSET is tied directly to VIN or GND.
How does spread spectrum clocking function in the TPS6281020QWRWYRQ1?
The TPS6281020QWRWYRQ1 implements spread spectrum clocking by modulating the switching frequency around the set point (e.g., ±10% deviation), reducing peak radiated emissions by >10 dB-critical for passing CISPR 25 Class 5 in automotive infotainment and ADAS modules.
What is the purpose of the SS/TR pin on the TPS6281020QWRWYRQ1?
The SS/TR pin on the TPS6281020QWRWYRQ1 serves dual functions: connecting a capacitor to GND sets soft-start ramp time, while applying an external voltage enables output voltage tracking-allowing precise sequencing of multiple power rails in complex automotive ECUs.
Is the TPS6281020QWRWYRQ1 qualified for automotive use?
Yes, the TPS6281020QWRWYRQ1 is AEC-Q100 Grade 1 qualified (–40°C to +125°C TA), includes functional safety documentation for ISO 26262 ASIL-B development, and is manufactured in TI's certified automotive processes-making it suitable for safety-critical infotainment and ADAS applications.
TPS6281020QWRWYRQ1 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:
- 4A
- Frequency - Switching:
- 1.8MHz ~ 4MHz
- Synchronous Rectifier:
- No
- 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)
TPS6281020QWRWYRQ1 FAQ
1.How can I place an order for TPS6281020QWRWYRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS6281020QWRWYRQ1 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 TPS6281020QWRWYRQ1 reliable?
The price and inventory of TPS6281020QWRWYRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS6281020QWRWYRQ1 is usually 5 days.
3.What payment methods are accepted for TPS6281020QWRWYRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS6281020QWRWYRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS6281020QWRWYRQ1?
TPS6281020QWRWYRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS6281020QWRWYRQ1 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 TPS6281020QWRWYRQ1?
For technical support, including TPS6281020QWRWYRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS6281020QWRWYRQ1 requirements.
6.How does Aetrix verify that TPS6281020QWRWYRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS6281020QWRWYRQ1 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 TPS6281020QWRWYRQ1 meets industry standards.
7.What is the process for return or replacement of TPS6281020QWRWYRQ1?
All TPS6281020QWRWYRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS6281020QWRWYRQ1, 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 TPS6281020QWRWYRQ1 part is unused and in its original packaging.
Return procedure for TPS6281020QWRWYRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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