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Texas Instruments TPS6281006QWRWYRQ1
- Part No.:
- TPS6281006QWRWYRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 9-VFQFN
- Datasheet:
-
TPS6281006QWRWYRQ1.pdf
- Description:
- IC REG BUCK 1V 4A 9VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,248
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Product details
Overview
TPS6281006QWRWYRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive synchronous step-down DC/DC converter delivering 4 A continuous output current, 1.0 V fixed output voltage, 15 µA typical quiescent current, and adjustable switching frequency from 1.8 MHz to 4 MHz in a 3 mm × 2 mm VQFN package with wettable flanks - used in ADAS sensor fusion and infotainment power rails.
For engineers reviewing the TPS6281006QWRWYRQ1 datasheet, TPS6281006QWRWYRQ1 pinout, TPS6281006QWRWYRQ1 application, or TPS6281006QWRWYRQ1 equivalent, key selection criteria include its 4 A output capability at +125°C ambient, ±1% output voltage accuracy in PWM mode, active output discharge, precise enable with user-defined UVLO, and forced-PWM/PFM operational flexibility.
Technical Context
The TPS6281006QWRWYRQ1 implements peak current mode control with internal loop compensation selectable via resistor on COMP/FSET, enabling stable operation across 27–470 µF output capacitance. Its high-side/low-side MOSFETs feature 37 mΩ / 15 mΩ RDS(on) at VIN ≥ 5 V, supporting high-efficiency regulation under automotive thermal stress.
It supports external synchronization (1.8–4 MHz), 100% duty cycle operation, and soft-start/tracking via SS/TR pin for rail sequencing. The device enters PFM mode below ~200 mA load to maintain >85% efficiency down to 10 µA output current while retaining ±1% output accuracy in PWM mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 4 A continuous - sustains full rated load at +125°C ambient without derating |
| Output Voltage | Fixed 1.0 V ±1% - eliminates external feedback resistors and reduces BOM count |
| Input Voltage Range | 2.75 V to 6 V - compatible with 3.3 V, 5 V, and automotive battery-supplied rails |
| Quiescent Current | 15 µA typical - enables always-on subsystems with minimal standby power loss |
| Switching Frequency | 1.8 MHz to 4 MHz adjustable - allows EMI optimization and compact filter design |
| Thermal Rating | AEC-Q100 Grade 1 (–40°C to +125°C TA) - qualified for engine bay and cockpit environments |
| Power-Good Output | Open-drain PG with window comparator - provides reliable rail monitoring for system sequencing |
Pinout & Package
TPS6281006QWRWYRQ1 uses a 9-pin VQFN package (RWY) with 3.00 mm × 2.00 mm body size and wettable flanks for automated optical inspection (AOI) compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN | Enable input | Logic-controlled startup with 1.1 V rising threshold; enables programmable UVLO and exact power-rail sequencing |
| FB | Feedback input | Internally tied to 1.0 V reference - no external divider required; simplifies layout and improves accuracy |
| GND | Power ground | Primary return path for high-current switch node and control circuitry; requires low-impedance PCB plane |
| MODE/SYNC | Mode control / sync input | Selects PFM/PWM or forced PWM; 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 for optimal transient response |
| PG | Power-good output | Open-drain flag indicating VOUT within ±5% of 1.0 V; supports system-level fault detection and sequencing |
| SS/TR | Soft-start / tracking input | Capacitor-to-GND sets ramp time; also accepts external voltage for supply tracking during startup |
| SW | Switch node | Connection to internal high-side/low-side MOSFETs; requires tight layout with low-inductance path to inductor |
| VIN | Input supply | Accepts 2.75–6 V; must be decoupled with ≥5 µF ceramic capacitor placed adjacent to pin |
Key Features
| Feature | Design Value |
|---|---|
| Active output discharge | 50 Ω internal discharge path - ensures rapid, controlled VOUT ramp-down during shutdown, preventing back-powering |
| Precise ENABLE input | 100 mV hysteresis between rising (1.1 V) and falling (1.0 V) thresholds - enables robust undervoltage lockout and clean power sequencing |
| Adjustable soft start | Programmable ramp time (100–200 µs) via SS/TR capacitor - limits inrush current and prevents input voltage droop |
| 100% duty cycle mode | Supports dropout operation down to VOUT = VIN - maintains regulation during cold-crank or low-battery conditions |
| Wettable flanks package | RWY (VQFN-9) with side-wettable leads - enables automated AOI for zero-defect automotive manufacturing |
Applications
| Infotainment Head Unit | Hybrid & Reconfigurable Cluster |
|---|---|
Use Scenario: Powering SoC core voltage (1.0 V) in head unit main processor under varying battery conditions (6–16 V). IC Role / Device Role / Timing Role: Primary 4 A buck regulator supplying CPU core rail with ±1% accuracy and fast transient response. Use Value: Maintains stable 1.0 V under 0–4 A dynamic load steps while operating continuously at +105°C ambient. | Use Scenario: Generating 1.0 V for display controller ASIC in digital instrument cluster with strict EMI limits. IC Role / Device Role / Timing Role: High-frequency (3.2 MHz) synchronous buck converter enabling small LC filter footprint. Use Value: Adjustable 1.8–4 MHz switching frequency avoids AM band interference and meets CISPR 25 Class 5 radiated emissions. |
| Telematics Control Unit | Surround View ECU |
Use Scenario: Supplying 1.0 V to LTE modem baseband processor with ultra-low quiescent current requirement. IC Role / Device Role / Timing Role: Always-on power stage with 15 µA IQ in light-load PFM mode and seamless transition to PWM at >200 mA. Use Value: Extends battery backup runtime by >3× versus standard 100 µA IQ converters during vehicle sleep mode. | Use Scenario: Powering image signal processor (ISP) in surround-view camera ECU requiring rail sequencing with other supplies. IC Role / Device Role / Timing Role: Sequenced 1.0 V rail using SS/TR pin to track 3.3 V AVDD rail during startup. Use Value: Prevents ISP latch-up by enforcing monotonic 1.0 V ramp aligned to 3.3 V, verified via PG flag assertion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS6281008QWRWYRQ1 | Fixed 1.1 V output; identical 4 A rating, package, and feature set | Used where 1.1 V core voltage is specified (e.g., certain radar SoCs) | Select when target SoC requires 1.1 V instead of 1.0 V - same layout, no redesign needed |
| TPS6281206QWRWYRQ1 | 2 A output, fixed 1.0 V, same RWY package and pinout | Suitable for lower-power domains (e.g., MCU peripherals) where 4 A is excessive | Choose for cost-sensitive, thermally constrained designs needing only 2 A - shares footprint but lower current capability |
Compared with TPS6281006QWRWYRQ1, TPS6281008QWRWYRQ1 offers identical performance at 1.1 V for alternate SoC requirements, while TPS6281206QWRWYRQ1 provides a pin-compatible 2 A option for reduced thermal load and bill-of-materials cost in non-core-rail applications.
Availability
TPS6281006QWRWYRQ1 is available at Aetrix Electronics and suitable for infotainment head units, hybrid instrument clusters, and ADAS sensor fusion ECUs requiring stable component supply across automotive production lifecycles.
Supply support for TPS6281006QWRWYRQ1 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 ICs.
The TPS6281x-Q1 product line delivers high-current, high-efficiency synchronous buck converters engineered specifically for automotive infotainment, ADAS, and telematics systems demanding AEC-Q100 qualification and functional safety support.
FAQ
What is the output voltage tolerance of the TPS6281006QWRWYRQ1 in PWM mode?
The TPS6281006QWRWYRQ1 guarantees ±1% output voltage accuracy over temperature (–40°C to +125°C) and line/load conditions in PWM mode. This specification applies to its fixed 1.0 V output and is measured with VIN ≥ VOUT + 1 V. The tight tolerance eliminates need for post-regulation trimming and ensures reliable SoC core voltage compliance.
Does the TPS6281006QWRWYRQ1 support external clock synchronization?
Yes, the TPS6281006QWRWYRQ1 supports external synchronization via its MODE/SYNC pin across 1.8 MHz to 4 MHz. Synchronization requires a resistor from COMP/FSET to GND; tying COMP/FSET directly to GND or VIN disables sync capability. The device locks to the external clock within 50 µs and maintains phase alignment critical for multi-rail noise reduction.
How does the TPS6281006QWRWYRQ1 manage thermal performance in automotive environments?
The TPS6281006QWRWYRQ1 achieves junction temperatures ≤+150°C via low RDS(on) MOSFETs (37 mΩ HS / 15 mΩ LS), optimized thermal pad design in the RWY package, and RθJA = 71.1°C/W. Its AEC-Q100 Grade 1 rating (–40°C to +125°C TA) and thermal shutdown at +170°C ensure robust operation in under-hood and dashboard locations.
Can the TPS6281006QWRWYRQ1 operate in 100% duty cycle mode?
Yes, the TPS6281006QWRWYRQ1 supports 100% duty cycle operation, allowing VOUT to track VIN down to VOUT = VIN. This feature maintains regulation during automotive cold-crank events (e.g., 4.5 V battery) when VIN approaches the 1.0 V output, preventing system brownout and ensuring uninterrupted operation of safety-critical loads.
Is the FB pin of the TPS6281006QWRWYRQ1 left unconnected or grounded?
The FB pin of the TPS6281006QWRWYRQ1 is internally connected to the 1.0 V reference and must be directly connected to the output voltage node - not left floating or grounded. This connection enables the internal error amplifier to regulate the fixed 1.0 V output and activates the power-good comparator. Incorrect FB routing causes regulation failure and PG flag malfunction.
TPS6281006QWRWYRQ1 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:
- 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)
TPS6281006QWRWYRQ1 FAQ
1.How can I place an order for TPS6281006QWRWYRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS6281006QWRWYRQ1 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 TPS6281006QWRWYRQ1 reliable?
The price and inventory of TPS6281006QWRWYRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS6281006QWRWYRQ1 is usually 5 days.
3.What payment methods are accepted for TPS6281006QWRWYRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS6281006QWRWYRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS6281006QWRWYRQ1?
TPS6281006QWRWYRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS6281006QWRWYRQ1 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 TPS6281006QWRWYRQ1?
For technical support, including TPS6281006QWRWYRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS6281006QWRWYRQ1 requirements.
6.How does Aetrix verify that TPS6281006QWRWYRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS6281006QWRWYRQ1 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 TPS6281006QWRWYRQ1 meets industry standards.
7.What is the process for return or replacement of TPS6281006QWRWYRQ1?
All TPS6281006QWRWYRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS6281006QWRWYRQ1, 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 TPS6281006QWRWYRQ1 part is unused and in its original packaging.
Return procedure for TPS6281006QWRWYRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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