My Inquiry
My Account
Texas Instruments TPS6281120QWRWYRQ1
- Part No.:
- TPS6281120QWRWYRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 9-VFQFN
- Datasheet:
-
TPS6281120QWRWYRQ1.pdf
- Description:
- IC REG BUCK ADJ 1A 9VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:6,422
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TPS6281120QWRWYRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive synchronous step-down DC/DC converter delivering 1 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 automatic PFM/PWM operation and integrates active output discharge and spread spectrum clocking for EMI reduction - deployed in infotainment head units and ADAS sensor fusion ECUs.
For engineers reviewing the TPS6281120QWRWYRQ1 datasheet, TPS6281120QWRWYRQ1 pinout, TPS6281120QWRWYRQ1 application, or TPS6281120QWRWYRQ1 equivalent, key selection criteria include its 1 A output capability, spread spectrum enablement, wettable-flank VQFN-9 package, AEC-Q100 qualification, and precise ENABLE/SS/TR sequencing control for multi-rail automotive power systems.
Technical Context
The TPS6281120QWRWYRQ1 implements peak current mode control with internal compensation selectable via resistor on COMP/FSET, enabling stable regulation across 15 µF–470 µF output capacitance. Its MODE/SYNC pin supports both PFM/PWM auto-mode transition and external synchronization (1.8–4 MHz) with sub-50 µs lock time.
It features a precision ENABLE input (1.06–1.15 V rising threshold) for programmable UVLO and rail sequencing, plus SS/TR pin with 2.1–2.8 µA sourcing current for soft-start timing or voltage tracking. The device includes integrated high-side (37–60 mΩ) and low-side (15–35 mΩ) MOSFETs, 100% duty cycle capability, and open-drain PG with window comparator (±5% VFB thresholds).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 1 A continuous - supports compact power rails in space-constrained automotive modules like telematics control units. |
| 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. |
| Output Voltage Accuracy | ±1% in PWM mode - ensures tight regulation for sensitive processors and SerDes interfaces without post-regulation. |
| Switching Frequency | 1.8 MHz to 4 MHz, adjustable via COMP/FSET resistor - enables EMI-sensitive layout optimization and avoids AM band interference. |
| Quiescent Current | 15 µA typical - extends battery life during vehicle sleep modes while maintaining fast wake-up response. |
| Spread Spectrum | Enabled - reduces peak radiated emissions by spreading energy across ~0.5% bandwidth, easing CISPR 25 Class 5 compliance. |
| Package | VQFN-9 (3 mm × 2 mm) with wettable flanks - supports automated optical inspection (AOI) and reliable solder joint formation in automotive reflow profiles. |
Pinout & Package
VQFN-9 package (RWY), 3.00 mm × 2.00 mm body, 0.4 mm pitch, wettable flanks, exposed thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - MODE/SYNC | 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. |
| 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 | Switch node | Connection to internal high-side/low-side MOSFETs; routes to external inductor and bootstrap capacitor. |
| 4 - GND | Ground reference | Primary power and signal ground; must be connected to thermal pad for optimal thermal performance (RθJB = 16.4 °C/W). |
| 5 - FB | Feedback input | Senses output voltage divider ratio; sets regulated VOUT = 0.6 V × (1 + R1/R2); leakage <70 nA preserves accuracy. |
| 6 - SS/TR | Soft-start/tracking input | Capacitor-to-GND sets startup ramp time; also accepts external voltage for supply tracking and precise power sequencing. |
| 7 - COMP/FSET | Compensation/frequency set | Resistor-to-GND selects both loop compensation (for 15–470 µF COUT) and switching frequency (1.8–4 MHz). |
| 8 - EN | Enable input | Logic-controlled start-up with 1.06–1.15 V rising threshold; supports RC-based delay and user-defined UVLO via resistor divider. |
| 9 - PG | Power-good output | Open-drain flag indicating VOUT within ±5% of target (window comparator); debounced with 40 µs deglitch time. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 | Qualified for –40°C to +125°C ambient operation - meets automotive reliability and lifetime requirements for front-end electronics. |
| Active Output Discharge | Integrated 50 Ω discharge path - ensures rapid, controlled VOUT decay during shutdown, preventing back-powering of downstream circuitry. |
| Precise ENABLE Threshold | 1.06–1.15 V rising edge with 100 mV hysteresis - enables robust power sequencing and customizable undervoltage lockout without external comparators. |
| 100% Duty Cycle Mode | Supports dropout operation down to VOUT ≈ VIN − 0.3 V - maintains regulation during low-input transients such as cold-crank or battery sag. |
| Functional Safety Documentation | FIT rate, failure mode analysis, and safety manual available - accelerates ISO 26262 ASIL-B system-level certification efforts. |
Applications
| Infotainment Head Unit | Hybrid Reconfigurable Cluster |
|---|---|
Use Scenario: Powers SoC, display interface, and audio codec in centralized infotainment systems requiring low-noise, sequenced 1.2 V/1.8 V/3.3 V rails. IC Role / Device Role / Timing Role: Primary point-of-load regulator delivering clean, tightly regulated 1 A at 1.2 V with spread spectrum to suppress switching noise near RF receivers. Use Value: ±1% output accuracy and 15 µA quiescent current reduce thermal load and extend battery reserve during ignition-off states. |
Use Scenario: Supplies configurable digital logic and analog drivers in modular instrument clusters with dynamic display content and backlight dimming. IC Role / Device Role / Timing Role: Sequenced 3.3 V rail generator synchronized to main MCU reset using SS/TR tracking and PG confirmation. Use Value: Wettable-flank VQFN-9 ensures AOI-compatible assembly; 100% duty cycle maintains display power during 4.5 V cold-crank dips. |
| Telematics Control Unit | Surround View ECU |
Use Scenario: Provides isolated 1.1 V core voltage for LTE/C-V2X modems operating in harsh under-hood environments with wide temperature swings. IC Role / Device Role / Timing Role: High-efficiency 1 A buck converter with forced PWM mode eliminating PFM noise that could interfere with cellular baseband signals. Use Value: Spread spectrum and 2.25 MHz fixed-frequency option minimize conducted emissions into CAN-FD and GNSS antenna paths. |
Use Scenario: Powers image signal processors and MIPI CSI-2 serializers in multi-camera surround-view systems demanding ultra-low EMI and fast transient response. IC Role / Device Role / Timing Role: Fast-starting 1.8 V rail with SS/TR-controlled ramp time (<200 µs) to meet camera boot timing constraints. Use Value: Active output discharge prevents ghost images during camera power cycling; PG output confirms rail readiness to host processor. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62811QWRWYRQ1 | No spread spectrum clocking enabled; identical 1 A rating, pinout, and package. | Lacks EMI reduction feature - suitable where radiated emissions are not constrained or where fixed-frequency deterministic timing is required. | Select when spread spectrum is unnecessary and cost sensitivity favors baseline variant. |
| TPS6281220QWRWYRQ1 | 2 A output current, same spread spectrum, VQFN-9 package, identical pinout and control features. | Higher current headroom for future-proofing or shared-rail designs; requires larger inductor and output capacitance. | Choose when system margin or multi-load consolidation demands >1 A capability without changing PCB layout. |
Compared with TPS62811QWRWYRQ1, the TPS6281120QWRWYRQ1 adds spread spectrum for EMI compliance without sacrificing efficiency or thermal performance; versus TPS6281220QWRWYRQ1, it trades current capacity for smaller magnetics and lower BOM cost in 1 A-limited applications.
Availability
TPS6281120QWRWYRQ1 is available at Aetrix Electronics and suitable for infotainment head units, telematics control units, and surround view ECUs requiring stable component supply, AEC-Q100 compliance, and production-ready automotive qualification.
Supply support for TPS6281120QWRWYRQ1 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 ICs, with decades of automotive qualification expertise and broad functional safety support.
The TPS6281x-Q1 product line delivers high-efficiency, small-footprint synchronous buck converters optimized for automotive infotainment, ADAS, and body electronics - emphasizing AEC-Q100 reliability, EMI control, and seamless integration into multi-rail power architectures.
FAQ
What is the maximum output current capability of the TPS6281120QWRWYRQ1?
The TPS6281120QWRWYRQ1 delivers up to 1 A of continuous output current across its full operating temperature range (–40°C to +125°C ambient). This rating is validated with proper PCB layout, thermal vias to internal ground plane, and recommended 0.47 µH inductor and ≥15 µF output capacitance. Peak current limit is 2.0–2.6 A (dc), ensuring robust overload protection without derating in automotive under-hood environments.
Does the TPS6281120QWRWYRQ1 support external clock synchronization?
Yes, the TPS6281120QWRWYRQ1 supports external clock synchronization via the MODE/SYNC pin when a resistor is connected from COMP/FSET to GND. The accepted synchronization frequency range is 1.8 MHz to 4 MHz, with lock time under 50 µs. Synchronization is not available if COMP/FSET is tied directly to VIN or GND - in those cases, only the internal 2.25 MHz oscillator operates.
How does spread spectrum clocking function in the TPS6281120QWRWYRQ1?
Spread spectrum clocking in the TPS6281120QWRWYRQ1 modulates the switching frequency around its nominal value (e.g., ±0.5%) to distribute electromagnetic energy across a wider bandwidth, reducing peak radiated emissions. This feature is enabled by default in the "20" suffix variant and helps achieve CISPR 25 Class 5 compliance without additional filtering components - critical for infotainment and ADAS modules near sensitive RF receivers.
What is the purpose of the SS/TR pin on the TPS6281120QWRWYRQ1?
The SS/TR (Soft-Start / Tracking) pin on the TPS6281120QWRWYRQ1 serves dual functions: (1) connecting a capacitor to GND sets the output voltage ramp time during startup, limiting inrush current; (2) applying an external voltage allows the output to track another supply rail for precise power sequencing. Its 2.1–2.8 µA sourcing current enables accurate timing with standard capacitor values (e.g., 4.7 nF = ~1 ms ramp).
Is the TPS6281120QWRWYRQ1 pin-compatible with other members of the TPS6281x-Q1 family?
Yes, the TPS6281120QWRWYRQ1 is fully pin-compatible with all TPS6281x-Q1 variants in the RWY (VQFN-9) package, including TPS62811QWRWYRQ1, TPS62812QWRWYRQ1, and TPS62813QWRWYRQ1. Identical pinout, footprint, and control interface allow drop-in replacement for current scaling (1 A → 2 A → 3 A) or feature adjustment (e.g., disabling spread spectrum), provided external components (inductor, COUT) are requalified per output current and stability requirements.
TPS6281120QWRWYRQ1 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:
- 1A
- 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)
TPS6281120QWRWYRQ1 FAQ
1.How can I place an order for TPS6281120QWRWYRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS6281120QWRWYRQ1 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 TPS6281120QWRWYRQ1 reliable?
The price and inventory of TPS6281120QWRWYRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS6281120QWRWYRQ1 is usually 5 days.
3.What payment methods are accepted for TPS6281120QWRWYRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS6281120QWRWYRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS6281120QWRWYRQ1?
TPS6281120QWRWYRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS6281120QWRWYRQ1 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 TPS6281120QWRWYRQ1?
For technical support, including TPS6281120QWRWYRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS6281120QWRWYRQ1 requirements.
6.How does Aetrix verify that TPS6281120QWRWYRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS6281120QWRWYRQ1 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 TPS6281120QWRWYRQ1 meets industry standards.
7.What is the process for return or replacement of TPS6281120QWRWYRQ1?
All TPS6281120QWRWYRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS6281120QWRWYRQ1, 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 TPS6281120QWRWYRQ1 part is unused and in its original packaging.
Return procedure for TPS6281120QWRWYRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPS6281120QWRWYRQ1 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…
