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Texas Instruments TPS6281320QWRWYRQ1
- Part No.:
- TPS6281320QWRWYRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 9-VFQFN
- Datasheet:
-
TPS6281320QWRWYRQ1.pdf
- Description:
- IC REG BUCK ADJ 3A 9VQFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
TPS6281320QWRWYRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive synchronous step-down DC/DC converter delivering up to 3 A continuous output current, with input voltage range 2.75 V to 6 V, adjustable output voltage (0.6 V to 5.5 V), ±1% feedback accuracy in PWM mode, and externally adjustable switching frequency from 1.8 MHz to 4 MHz. It supports forced PWM or PWM/PFM operation and includes active output discharge, power-good monitoring, and spread spectrum clocking.
For engineers reviewing the TPS6281320QWRWYRQ1 datasheet, TPS6281320QWRWYRQ1 pinout, TPS6281320QWRWYRQ1 application, or TPS6281320QWRWYRQ1 equivalent, key selection considerations include its 3 A output capability, wettable-flank VQFN-9 package, AEC-Q100 qualification, functional safety documentation support, and spread spectrum enablement for EMI reduction in infotainment and ADAS power rails.
Technical Context
The TPS6281320QWRWYRQ1 implements peak current mode control with internal loop compensation selectable via resistor on COMP/FSET, enabling stable regulation across 27–470 µF output capacitance. Its MODE/SYNC pin supports both PFM/PWM auto-mode transition and external synchronization (1.8–4 MHz) when paired with a COMP/FSET-to-GND resistor.
It features precise ENABLE with user-defined UVLO via external divider, SS/TR pin for soft-start timing or voltage tracking, and a dedicated open-drain PG output with window comparator (±5% threshold hysteresis). The device operates from –40°C to +125°C ambient and supports 100% duty cycle for low-dropout operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 3 A continuous - supports high-current rails in cluster and telematics ECUs without thermal derating at +125°C ambient. |
| 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). |
| Feedback Accuracy | ±1% in PWM mode - enables tight output regulation for sensitive SoC cores and SerDes supplies. |
| Switching Frequency | 1.8 MHz to 4 MHz, adjustable via COMP/FSET resistor - allows EMI optimization and inductor size reduction while maintaining >90% efficiency at 3.3 V/2 A. |
| Quiescent Current | 15 µA typical - extends battery runtime in always-on vehicle modules during sleep modes. |
| Package | VQFN-9 (RWY), 3.0 mm × 2.0 mm with wettable flanks - supports automated optical inspection (AOI) and reliable reflow in automotive PCB assembly. |
| Spread Spectrum | Enabled - reduces peak radiated emissions by spreading switching energy across ~0.5% bandwidth, easing CISPR 25 Class 5 compliance. |
Pinout & Package
VQFN-9 (RWY) package, 3.0 mm × 2.0 mm body, 0.4 mm pitch, wettable flanks, exposed thermal pad (GND-connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| MODE/SYNC (Pin 1) | Digital control input | Selects PFM/PWM auto-mode (low) or forced PWM (high); accepts external sync clock (1.8–4 MHz) when COMP/FSET has R-to-GND. |
| VIN (Pin 2) | Power input | Primary input supply connection; requires local 5–10 µF ceramic capacitor to GND for stability and transient response. |
| SW (Pin 3) | Power switch node | Internal high-side/low-side MOSFET drain connection; routes to external inductor and must be minimized for EMI and efficiency. |
| GND (Pin 4) | Ground reference | Power and signal ground; connects to thermal pad; forms return path for VIN, SW, and PG currents. |
| FB (Pin 5) | Feedback input | Senses output voltage via resistive divider; sets regulated VOUT = 0.6 V × (1 + R1/R2); leakage <70 nA ensures accuracy. |
| SS/TR (Pin 6) | Soft-start/tracking control | Capacitor-to-GND sets startup ramp time; can track external voltage source for supply sequencing in multi-rail systems. |
| COMP/FSET (Pin 7) | Compensation & frequency set | Resistor-to-GND selects both control-loop compensation (for 27–470 µF COUT) and switching frequency (1.8–4 MHz). |
| EN (Pin 8) | Enable input | Logic-controlled startup; rising threshold 1.06–1.15 V allows RC-delayed power-up and programmable UVLO using external divider. |
| PG (Pin 9) | Power-good output | Open-drain flag indicating VOUT within ±5% of target; deglitched (40 µs), supports system reset or rail monitoring. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation, meeting automotive reliability and stress-test requirements. |
| Active output discharge | 50 Ω internal discharge path - ensures rapid, controlled VOUT ramp-down during shutdown, preventing back-powering of downstream circuitry. |
| Precise ENABLE with UVLO | 100 mV hysteresis between rising (1.1 V typ) and falling (1.0 V typ) thresholds - enables robust power sequencing and brown-out protection. |
| Power-good with window comparator | Monitors VOUT against 92–98% (UVP) and 107–113% (OVP) of FB reference - provides fail-safe detection of overvoltage and undervoltage faults. |
| Adjustable soft-start | Programmable ramp time (100–200 µs) via SS/TR capacitor - limits inrush current and prevents input voltage droop during startup. |
Applications
| Infotainment Head Unit | Hybrid Reconfigurable Cluster |
|---|---|
Use Scenario: Powers application processor, display interface, and audio codec in centralized head unit with dynamic load profiles. IC Role / Device Role / Timing Role: Primary 3.3 V/2.5 V/1.2 V buck regulator supplying SoC I/O, memory, and core rails with fast transient response. Use Value: Spread spectrum and 3 A capability reduce conducted EMI and eliminate need for additional filtering, simplifying layout in space-constrained dashboards. | Use Scenario: Supplies configurable instrument cluster with TFT-LCD, microcontroller, and CAN transceivers under varying illumination and temperature conditions. IC Role / Device Role / Timing Role: Main 5 V → 3.3 V conversion stage with precise sequencing (via SS/TR) to coordinate MCU boot with display initialization. Use Value: ±1% output accuracy and 15 µA quiescent current ensure consistent display brightness and extended battery-off duration in parked state. |
| Telematics Control Unit | Surround View ECU |
Use Scenario: Delivers stable 1.8 V and 3.3 V rails to LTE modem, GNSS receiver, and secure element in cellular-connected vehicle gateway. IC Role / Device Role / Timing Role: Dual-output support via feedback divider configuration; PG output signals health to host MCU for fault logging and OTA update readiness. Use Value: AEC-Q100 qualification and –40°C to +125°C operation guarantee uninterrupted connectivity during extreme ambient exposure. | Use Scenario: Powers image signal processors and high-speed serializer/deserializer (SerDes) links in 360° camera fusion module. IC Role / Device Role / Timing Role: High-efficiency 1.1 V core supply with <75 ns minimum on-time supporting fast load transients from sensor burst reads. Use Value: Low RDS(on) (37 mΩ HS / 15 mΩ LS) maintains >92% efficiency at 2 A, minimizing thermal impact on adjacent camera sensors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62813QWRWYRQ1 | No spread spectrum clocking; otherwise identical pinout, 3 A rating, and electrical specs. | Suitable where EMI is managed at system level (e.g., shielded enclosures), not at IC level. | Select when spread spectrum is unnecessary and cost optimization is prioritized. |
| TPS6281220QWRWYRQ1 | 2 A output current; same spread spectrum enablement and package; shares COMP/FSET and MODE/SYNC functionality. | Better suited for lower-power domains like CAN FD gateways or sensor hubs requiring <2 A. | Choose for cost-sensitive, lower-current applications where footprint compatibility is retained but 3 A headroom is unused. |
Compared with TPS62813QWRWYRQ1, the TPS6281320QWRWYRQ1 adds spread spectrum for EMI reduction without sacrificing efficiency or thermal performance; versus TPS6281220QWRWYRQ1, it delivers 50% higher current capacity in identical footprint-critical for multi-core ADAS SoCs.
Availability
TPS6281320QWRWYRQ1 is available at Aetrix Electronics and suitable for infotainment head units, hybrid reconfigurable clusters, and surround-view ECUs requiring stable component supply across automotive production lifecycles.
Supply support for TPS6281320QWRWYRQ1 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 solutions.
The TPS6281x-Q1 product line delivers high-efficiency, AEC-Q100-qualified DC/DC converters optimized for infotainment, ADAS, and telematics systems demanding compact size, low EMI, and functional safety support.
FAQ
What is the maximum output current capability of the TPS6281320QWRWYRQ1?
The TPS6281320QWRWYRQ1 delivers up to 3 A continuous output current across the full operating temperature range (–40°C to +125°C ambient), enabled by low RDS(on) MOSFETs (37 mΩ high-side, 15 mΩ low-side) and optimized thermal design in the RWY package. This rating assumes proper PCB layout with adequate copper area for thermal dissipation and input/output capacitance per datasheet recommendations.
Does the TPS6281320QWRWYRQ1 support external clock synchronization?
Yes, the TPS6281320QWRWYRQ1 supports external clock synchronization via the MODE/SYNC pin (Pin 1) across 1.8 MHz to 4 MHz, but only when a resistor is connected from COMP/FSET (Pin 7) to GND. If COMP/FSET is tied directly to VIN or GND, external sync is disabled. The device uses a PLL to lock to the external clock on falling edges, enabling phase-shifted operation for multi-converter systems.
How does spread spectrum clocking function in the TPS6281320QWRWYRQ1?
Spread spectrum clocking in the TPS6281320QWRWYRQ1 modulates the switching frequency around its nominal value to distribute electromagnetic energy across a wider bandwidth, reducing peak radiated emissions. This feature is enabled by default in the "20" variant and helps meet stringent automotive EMI standards such as CISPR 25 Class 5 without requiring additional shielding or filtering components.
What is the purpose of the SS/TR pin on the TPS6281320QWRWYRQ1?
The SS/TR (Soft-Start / Tracking) pin (Pin 6) serves two functions: (1) connecting a capacitor to GND sets the output voltage ramp time during startup, limiting inrush current; (2) applying an external voltage enables output tracking for precise sequencing with other power rails. The tracking gain is unity (VOUT/VSS/TR ≈ 1), with a 17 mV offset, allowing accurate alignment of multiple supplies in complex SoC systems.
Is the TPS6281320QWRWYRQ1 qualified for automotive use?
Yes, the TPS6281320QWRWYRQ1 is AEC-Q100 qualified for automotive applications (Grade 1: –40°C to +125°C ambient), includes functional safety documentation support for ISO 26262 ASIL-B system integration, and is manufactured in TI's certified automotive facilities. It meets automotive reliability, ESD (±2 kV HBM), and thermal performance requirements for under-hood and cabin-mounted ECUs.
TPS6281320QWRWYRQ1 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:
- 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)
TPS6281320QWRWYRQ1 FAQ
1.How can I place an order for TPS6281320QWRWYRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS6281320QWRWYRQ1 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 TPS6281320QWRWYRQ1 reliable?
The price and inventory of TPS6281320QWRWYRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS6281320QWRWYRQ1 is usually 5 days.
3.What payment methods are accepted for TPS6281320QWRWYRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS6281320QWRWYRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS6281320QWRWYRQ1?
TPS6281320QWRWYRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS6281320QWRWYRQ1 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 TPS6281320QWRWYRQ1?
For technical support, including TPS6281320QWRWYRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS6281320QWRWYRQ1 requirements.
6.How does Aetrix verify that TPS6281320QWRWYRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS6281320QWRWYRQ1 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 TPS6281320QWRWYRQ1 meets industry standards.
7.What is the process for return or replacement of TPS6281320QWRWYRQ1?
All TPS6281320QWRWYRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS6281320QWRWYRQ1, 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 TPS6281320QWRWYRQ1 part is unused and in its original packaging.
Return procedure for TPS6281320QWRWYRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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