My Inquiry
My Account
Texas Instruments TPS6281240QWRWYRQ1
- Part No.:
- TPS6281240QWRWYRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 9-VFQFN
- Datasheet:
-
TPS6281240QWRWYRQ1.pdf
- Description:
- IC REG BUCK ADJ 2A 9VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,747
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TPS6281240QWRWYRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive synchronous step-down DC/DC converter delivering up to 2 A continuous output current, operating from 2.75 V to 6 V input, with adjustable output voltage (0.6 V–5.5 V), ±1% PWM-mode accuracy, and externally adjustable switching frequency from 1.8 MHz to 4 MHz. It supports forced PWM or automatic PWM/PFM mode, features active output discharge disable, spread spectrum clocking, and power-good monitoring - deployed in ADAS sensor fusion and telematics control units.
For engineers reviewing the TPS6281240QWRWYRQ1 datasheet, TPS6281240QWRWYRQ1 pinout, TPS6281240QWRWYRQ1 application, or TPS6281240QWRWYRQ1 equivalent, key selection criteria include its 2 A output capability, absence of active output discharge, spread-spectrum enablement for EMI reduction, and compatibility with 3 mm × 2 mm VQFN-RWY package with wettable flanks in automotive-grade thermal and reliability environments.
Technical Context
The TPS6281240QWRWYRQ1 implements peak current mode control with internal compensation selectable via resistor on COMP/FSET, supporting stable regulation across 15 µF–470 µF output capacitance ranges. Its MODE/SYNC pin enables external clock synchronization (1.8–4 MHz) or PFM/PWM mode selection, while precise ENABLE allows user-defined UVLO and rail sequencing.
Unlike other variants in the TPS6281x-Q1 family, this part disables active output discharge (disconnected DISCHARGE function per Device Comparison Table) and enables spread spectrum clocking (SSC = ON), distinguishing its EMI behavior and shutdown discharge path - critical for systems requiring controlled power-down without rapid rail collapse.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 2 A continuous - supports high-density automotive rails like SoC core or GPU I/O supplies without 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 domains including cold-crank (down to 2.75 V). |
| Output Voltage Accuracy | ±1% in PWM mode - ensures tight regulation for sensitive analog or high-speed digital loads without post-regulation trimming. |
| Switching Frequency | 1.8 MHz to 4 MHz, adjustable via COMP/FSET resistor - enables optimization for size (higher fS) or efficiency (lower fS) and EMI compliance via spread spectrum. |
| Quiescent Current | 15 µA typical - sustains ultra-low standby power in always-on vehicle modules such as remote keyless entry receivers or CAN wake-up circuits. |
| Thermal Rating | AEC-Q100 Grade 1 (–40°C to +125°C TA), junction limit +150°C - validated for under-hood and infotainment head unit placement. |
| Package | VQFN-RWY, 3 mm × 2 mm, 9-pin, wettable flanks - supports automated optical inspection (AOI) and high-reliability reflow in automotive PCB assembly. |
Pinout & Package
VQFN-RWY package (3.00 mm × 2.00 mm, 0.4 mm pitch, 9-pin), thermally enhanced with exposed thermal pad and wettable flanks for solder joint inspection and thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - MODE/SYNC | Digital control input | Selects PFM/PWM mode (low) or forced PWM (high); accepts external sync clock (1.8–4 MHz) when COMP/FSET has R-to-GND. |
| 2 - VIN | Power input | Main supply input (2.75–6 V); requires local 5–10 µF ceramic capacitor to GND for stability and transient response. |
| 3 - SW | Power switch node | Connects to external inductor; carries high di/dt switching current - layout critical for EMI and efficiency. |
| 4 - GND | Ground reference | Primary power and signal ground; must be low-impedance plane tied to thermal pad for thermal performance. |
| 5 - FB | Feedback input | Resistive divider input for adjustable output; 0.6 V reference - sets VOUT = 0.6 V × (1 + R1/R2). |
| 6 - SS/TR | Soft-start/tracking | Capacitor-to-GND sets startup ramp time; also accepts external voltage for supply rail tracking during sequencing. |
| 7 - COMP/FSET | Compensation & frequency set | Resistor-to-GND selects both control-loop compensation and switching frequency (1.8–4 MHz); tied to GND/VIN fixes fS = 2.25 MHz. |
| 8 - EN | Enable input | Logic-controlled enable with 1.06–1.15 V rising threshold - supports RC-delayed startup and programmable UVLO via resistor divider. |
| 9 - PG | Power-good open-drain | Active-low indicator with window comparator (±5% VFB); requires pull-up for system monitoring and sequencing logic. |
Key Features
| Feature | Design Value |
|---|---|
| Spread spectrum clocking (SSC) | Reduces peak EMI by >10 dB across 1.8–4 MHz band - eliminates need for external EMI filters in compact ADAS modules. |
| No active output discharge | Disables internal discharge FET - preserves output voltage during shutdown for systems requiring hold-up or state retention (e.g., camera sensor bias rails). |
| Precise ENABLE with UVLO | 1.1 V ±50 mV enable threshold - enables robust power sequencing and brown-out protection using simple resistor dividers off battery. |
| 100% duty cycle operation | Maintains regulation down to VOUT ≈ VIN – 0.1 V - supports wide-input applications like USB-C PD sink rails or backup power switchover. |
| Wettable flank package | Enables automated X-ray and AOI verification of solder joints - required for zero-defect automotive manufacturing traceability. |
Applications
| Infotainment Head Unit | Telematics Control Unit |
|---|---|
Use Scenario: Powering multi-core application processor, display interface, and audio codec in centralized vehicle infotainment systems. IC Role / Device Role / Timing Role: Primary 1.1 V/1.8 V/3.3 V point-of-load regulator with precise sequencing and low-noise operation. Use Value: ±1% output accuracy and 15 µA quiescent current ensure stable SoC operation and extended battery-off runtime in parked vehicle mode. | Use Scenario: Supplying LTE/C-V2X modem, GNSS receiver, and secure MCU in connected vehicle gateways. IC Role / Device Role / Timing Role: High-efficiency, EMI-optimized buck converter enabling FCC/CE compliance without shielding. Use Value: Spread spectrum clocking and 4 MHz max switching frequency allow compact 1.0 µH inductor use while meeting automotive radiated emissions limits. |
| Surround View ECU | Hybrid Reconfigurable Cluster |
Use Scenario: Powering four synchronized image signal processors (ISPs) and FPGA fabric in 360° camera processing units. IC Role / Device Role / Timing Role: Synchronized multi-rail buck converter with SS/TR pin enabling precise voltage ramp alignment across parallel channels. Use Value: External clock synchronization (via MODE/SYNC) eliminates beat frequencies between multiple TPS6281240QWRWYRQ1 devices, preventing image noise artifacts. | Use Scenario: Delivering dynamically reconfigured voltages to scalable LCD/OLED display drivers and haptic feedback actuators in digital instrument clusters. IC Role / Device Role / Timing Role: Adjustable-frequency buck with soft-start control enabling seamless rail transitions during display mode changes. Use Value: Adjustable soft-start (via SS/TR capacitor) prevents inrush current spikes during cluster boot/reboot, avoiding CAN bus voltage droop. |
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, same package, but includes active output discharge (ON) and spread spectrum (ON). | Required where fast rail discharge is needed after shutdown (e.g., safety-critical reset paths). | Select when active discharge is mandatory; avoid if output voltage hold-up is required. |
| TPS6281206QWRWYRQ1 | Fixed 1.0 V output, 2 A, no spread spectrum, active discharge enabled. | Used in cost-sensitive, single-rail applications where output voltage is invariant and EMI filtering is handled externally. | Choose for simplified BOM where adjustable VOUT and SSC are unnecessary. |
Compared with TPS6281220QWRWYRQ1 and TPS6281206QWRWYRQ1, the TPS6281240QWRWYRQ1 uniquely combines adjustable output voltage, spread spectrum clocking, and disabled active discharge - making it optimal for EMI-sensitive, sequenced multi-rail systems requiring controlled power-down behavior.
Availability
TPS6281240QWRWYRQ1 is available at Aetrix Electronics and suitable for infotainment head units, telematics control units, and surround-view ECUs requiring stable component supply with full AEC-Q100 Grade 1 qualification and long-term automotive lifecycle support.
Supply support for TPS6281240QWRWYRQ1 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, with decades of automotive qualification expertise and functional safety documentation support.
The TPS6281x-Q1 product line delivers high-efficiency, small-footprint synchronous buck converters designed specifically for demanding automotive subsystems including ADAS, infotainment, and body electronics - emphasizing AEC-Q100 compliance, thermal robustness, and EMI resilience.
FAQ
What is the maximum output current capability of the TPS6281240QWRWYRQ1?
The TPS6281240QWRWYRQ1 delivers up to 2 A continuous output current across its full operating temperature range (–40°C to +125°C ambient), supported by low RDS(on) MOSFETs (37 mΩ high-side, 15 mΩ low-side at VIN ≥ 5 V) and optimized thermal design in the 3 mm × 2 mm VQFN-RWY package. Derating is not required below +125°C ambient per datasheet thermal metrics (RθJA = 71.1°C/W).
Does the TPS6281240QWRWYRQ1 support external clock synchronization?
Yes, the TPS6281240QWRWYRQ1 supports external clock synchronization via the MODE/SYNC pin across 1.8 MHz to 4 MHz, provided a resistor is connected from COMP/FSET to GND. When COMP/FSET is tied directly to GND or VIN, synchronization is disabled. The device locks to the external clock within 50 µs and maintains phase alignment suitable for multi-converter systems.
How does the absence of active output discharge affect system behavior with the TPS6281240QWRWYRQ1?
The TPS6281240QWRWYRQ1 has active output discharge disabled (DISCHARGE = OFF per Device Comparison Table), meaning the output capacitor discharges only through the load and parasitic paths. This preserves VOUT longer after shutdown - beneficial for systems needing state retention, such as camera sensor bias or non-volatile configuration storage, but requires external discharge circuitry if rapid rail collapse is required.
What is the purpose of the SS/TR pin on the TPS6281240QWRWYRQ1?
The SS/TR (Soft-Start/Tracking) pin on the TPS6281240QWRWYRQ1 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 rails. Tracking gain is unity (VFB/VSS/TR = 1) with 17 mV offset, enabling accurate multi-supply coordination in complex automotive ECUs.
Can the TPS6281240QWRWYRQ1 operate in 100% duty cycle mode?
Yes, the TPS6281240QWRWYRQ1 supports 100% duty cycle operation, maintaining regulation when VOUT approaches VIN (down to VOUT ≈ VIN – 0.1 V). This enables use in applications like battery-powered backup rails or USB-C PD sink supplies where input and output voltages converge, eliminating the need for linear regulators or additional buck-boost stages.
TPS6281240QWRWYRQ1 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 (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 9-VQFN-HR (3x2)
TPS6281240QWRWYRQ1 FAQ
1.How can I place an order for TPS6281240QWRWYRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS6281240QWRWYRQ1 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 TPS6281240QWRWYRQ1 reliable?
The price and inventory of TPS6281240QWRWYRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS6281240QWRWYRQ1 is usually 5 days.
3.What payment methods are accepted for TPS6281240QWRWYRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS6281240QWRWYRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS6281240QWRWYRQ1?
TPS6281240QWRWYRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS6281240QWRWYRQ1 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 TPS6281240QWRWYRQ1?
For technical support, including TPS6281240QWRWYRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS6281240QWRWYRQ1 requirements.
6.How does Aetrix verify that TPS6281240QWRWYRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS6281240QWRWYRQ1 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 TPS6281240QWRWYRQ1 meets industry standards.
7.What is the process for return or replacement of TPS6281240QWRWYRQ1?
All TPS6281240QWRWYRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS6281240QWRWYRQ1, 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 TPS6281240QWRWYRQ1 part is unused and in its original packaging.
Return procedure for TPS6281240QWRWYRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPS6281240QWRWYRQ1 Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
