My Inquiry
My Account
Texas Instruments TPS6281109QWRWYRQ1
- Part No.:
- TPS6281109QWRWYRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 9-VFQFN
- Datasheet:
-
TPS6281109QWRWYRQ1.pdf
- Description:
- IC REG BUCK 1.15V 1A 9VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TPS6281109QWRWYRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive synchronous step-down DC/DC converter delivering 1 A continuous output current with fixed 1.15 V output voltage, 2.75 V to 6 V input range, and adjustable switching frequency from 1.8 MHz to 4 MHz. It features active output discharge, power-good monitoring, and precise enable for rail sequencing in infotainment and ADAS power rails.
For engineers reviewing the TPS6281109QWRWYRQ1 datasheet, TPS6281109QWRWYRQ1 pinout, TPS6281109QWRWYRQ1 application, or TPS6281109QWRWYRQ1 equivalent, key selection criteria include its fixed 1.15 V output, wettable-flank VQFN-9 package, ±1% output voltage accuracy in PWM mode, forced-PWM/PFM operation modes, and functional safety documentation support.
Technical Context
The TPS6281109QWRWYRQ1 implements peak current mode control with internally compensated loop architecture and three selectable compensation settings via the COMP/FSET pin. Its MODE/SYNC pin supports external clock synchronization (1.8–4 MHz) or logic-controlled PFM/PWM mode selection.
It integrates low-RDS(on) high-side (37–60 mΩ) and low-side (15–35 mΩ) MOSFETs optimized for high ambient temperature operation, enabling 1 A continuous output at up to +125°C ambient. The device includes a dedicated SS/TR pin for soft-start timing or voltage tracking, and a window-comparator-based PG output with 40 µs deglitching.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.15 V - eliminates external feedback resistors; ensures stable core supply for automotive MCUs or FPGAs requiring precise 1.15 V bias. |
| Input Voltage Range | 2.75 V to 6 V - supports direct connection to automotive 3.3 V, 5 V, or battery-backed rails with cold-crank tolerance down to 2.75 V. |
| Output Current | 1 A continuous - sufficient for powering single-core automotive processors, CAN transceivers, or sensor interface ICs without thermal derating at +125°C ambient. |
| Quiescent Current | 15 µA typical - enables ultra-low-power sleep-mode operation in always-on vehicle networks while maintaining fast wake-up response. |
| Switching Frequency | 1.8 MHz to 4 MHz adjustable - allows EMI optimization and compact filter design using sub-1 µH inductors and ceramic capacitors. |
| Output Accuracy | ±1% in PWM mode - guarantees tight regulation for sensitive analog or mixed-signal circuits without post-regulation LDOs. |
| Thermal Rating | AEC-Q100 Grade 1 (–40°C to +125°C TA) - qualified for under-hood and dashboard-mounted applications with no derating up to 125°C ambient. |
Pinout & Package
The TPS6281109QWRWYRQ1 is housed in a 3.0 mm × 2.0 mm VQFN-9 package with wettable flanks (RWY), enabling automated optical inspection (AOI) of solder joints in automotive PCB assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (Pin 8) | Enable control input | Logic-level input with 1.06–1.15 V rising threshold; supports programmable UVLO and precise power-rail sequencing via external resistor divider. |
| FB (Pin 5) | Feedback reference | Internally tied to 1.15 V reference; must be connected directly to output for fixed-voltage operation-no external resistor divider required. |
| GND (Pin 4) | Power ground | Primary return path for high-current switch node and control circuitry; requires low-inductance layout to minimize noise coupling. |
| MODE/SYNC (Pin 1) | Mode control / sync input | Pull-low for PFM/PWM auto-mode; pull-high for forced PWM; accepts external 1.8–4 MHz clock for synchronized multi-rail systems. |
| COMP/FSET (Pin 7) | Compensation & frequency set | Resistor-to-GND sets both switching frequency (1.8–4 MHz) and internal loop compensation; tied to GND/VIN for fixed 2.25 MHz operation. |
| PG (Pin 9) | Power-good open-drain output | Asserts high-Z when output is within ±5% of 1.15 V (95–107% window); used for system reset or downstream enable sequencing. |
| SS/TR (Pin 6) | Soft-start / tracking input | Capacitor-to-GND sets startup ramp time; can accept external voltage for output tracking during power-up of multiple rails. |
| SW (Pin 3) | Switch node | High-frequency switching point connecting internal HS/LS MOSFETs; requires tight layout with minimal trace length and adjacent ground pour. |
| VIN (Pin 2) | Input power supply | Accepts 2.75–6 V; must be decoupled with ≥5 µF effective capacitance placed adjacent to pin to suppress high-frequency ripple. |
Key Features
| Feature | Design Value |
|---|---|
| Active Output Discharge | 50 Ω internal discharge path - ensures rapid, controlled output voltage decay during shutdown to prevent back-powering or latch-up in multi-rail systems. |
| Adjustable Soft Start | Programmable ramp time (100–200 µs) via SS/TR capacitor - limits inrush current and prevents input voltage droop during cold-start conditions. |
| 100% Duty Cycle Mode | Supports dropout operation down to VOUT = VIN − 0.1 V - maintains regulation during low-input transients such as automotive load-dump recovery. |
| Functional Safety Documentation | FIT rate, failure mode analysis, and safety manual available - enables integration into ASIL-B/C systems without additional safety hardware. |
| Wettable Flank Package | RWY (VQFN-9) with side-wettable leads - enables automated X-ray and AOI verification of solder joint integrity per IPC-A-610 Class 3 requirements. |
Applications
| Infotainment Head Unit | Hybrid Reconfigurable Cluster |
|---|---|
|
Use Scenario: Powering ARM Cortex-A72 application processor core rail in automotive head unit with dynamic DVFS scaling. IC Role / Device Role / Timing Role: Primary 1.15 V core regulator delivering 1 A with <100 µs transient response to CPU frequency changes. Use Value: Fixed 1.15 V output eliminates feedback resistor error; ±1% accuracy ensures processor stability across –40°C to +125°C ambient. |
Use Scenario: Supplying configurable FPGA I/O bank in digital instrument cluster supporting multiple display configurations. IC Role / Device Role / Timing Role: Dedicated 1.15 V rail generator with soft-start and PG signaling for safe FPGA configuration sequencing. Use Value: Active output discharge prevents floating I/O states during power cycling; wettable flanks ensure solder reliability in vibration-prone dash mounting. |
| Telematics Control Unit | Surround View ECU |
|
Use Scenario: Regulating power for LTE modem baseband processor in cellular-connected TCU with always-on wake capability. IC Role / Device Role / Timing Role: Low-quiescent-current (15 µA) buck converter maintaining 1.15 V supply during deep-sleep modem states. Use Value: Ultra-low IQ extends battery backup runtime; EN pin threshold hysteresis enables clean wake-up from vehicle CAN bus activity. |
Use Scenario: Providing clean 1.15 V supply to image signal processor (ISP) in multi-camera surround-view system with strict EMI limits. IC Role / Device Role / Timing Role: High-frequency (≥2.25 MHz) switching regulator minimizing conducted emissions near camera sensor analog front-ends. Use Value: Adjustable 1.8–4 MHz frequency avoids critical bands in CISPR 25 Class 5; spread spectrum option further reduces peak EMI. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS628110AQWRWYRQ1 | Fixed 1.2 V output; identical package, pinout, and electrical specs except VOUT. | Suitable for SoCs requiring 1.2 V core voltage instead of 1.15 V; no layout change needed. | Select when target processor specifies 1.2 V nominal core voltage per datasheet. |
| TPS6281120QWRWYRQ1 | Same 1.15 V output but adds spread spectrum clocking (SSC); otherwise identical pinout and performance. | Preferred in EMI-sensitive environments (e.g., radar proximity, RF modules) where peak spectral density reduction is mandatory. | Choose when CISPR 25 Class 5 compliance requires >10 dB peak EMI reduction without filter redesign. |
Compared with TPS6281109QWRWYRQ1, the 1.2 V variant offers direct compatibility for higher-voltage cores, while the SSC-enabled version provides certified EMI mitigation-neither requires PCB revision, but only the latter delivers measurable radiated emission improvement in dense RF zones.
Availability
TPS6281109QWRWYRQ1 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS domain controllers, and telematics applications requiring stable component supply, AEC-Q100 qualification, and long-term production continuity.
Supply support for TPS6281109QWRWYRQ1 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 over 40 years of automotive qualification experience.
The TPS6281x-Q1 family was designed specifically for high-reliability automotive power rails-including infotainment, ADAS, and body electronics-where small size, thermal robustness, and functional safety readiness are mandatory.
FAQ
What is the output voltage of the TPS6281109QWRWYRQ1?
The TPS6281109QWRWYRQ1 delivers a fixed 1.15 V output voltage. This value is factory-trimmed and does not require external feedback resistors. Its ±1% accuracy in PWM mode ensures stable core supply for automotive processors and FPGAs operating across –40°C to +125°C ambient temperature.
Does the TPS6281109QWRWYRQ1 support external frequency synchronization?
Yes, the TPS6281109QWRWYRQ1 supports external clock synchronization via the MODE/SYNC pin (Pin 1) across 1.8 MHz to 4 MHz. Synchronization requires a resistor from COMP/FSET to GND; tying COMP/FSET to GND or VIN disables sync capability. The device locks to the external clock within 50 µs.
What package type and dimensions does the TPS6281109QWRWYRQ1 use?
The TPS6281109QWRWYRQ1 uses a 3.0 mm × 2.0 mm VQFN-9 package with wettable flanks (RWY). This RoHS-compliant, leadless package enables automated optical inspection of solder joints and supports high-density automotive PCB layouts with thermal performance rated at RθJA = 71.1°C/W.
How does the TPS6281109QWRWYRQ1 handle power sequencing in multi-rail systems?
The TPS6281109QWRWYRQ1 supports precise sequencing via its EN pin (programmable UVLO) and SS/TR pin (voltage tracking). The PG output signals valid regulation status, allowing it to enable downstream regulators or processors only after 1.15 V reaches ±5% tolerance-ensuring safe, repeatable boot sequences in complex ECUs.
Is the TPS6281109QWRWYRQ1 qualified for automotive safety-critical applications?
Yes, the TPS6281109QWRWYRQ1 is AEC-Q100 Grade 1 qualified (–40°C to +125°C TA) and functional safety-capable. Texas Instruments provides FIT data, failure mode analysis, and a safety manual to support ISO 26262 ASIL-B/C system integration-no additional safety mechanisms are required for basic fault detection.
TPS6281109QWRWYRQ1 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):
- 1.15V
- Voltage - Output (Max):
- -
- 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)
TPS6281109QWRWYRQ1 FAQ
1.How can I place an order for TPS6281109QWRWYRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS6281109QWRWYRQ1 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 TPS6281109QWRWYRQ1 reliable?
The price and inventory of TPS6281109QWRWYRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS6281109QWRWYRQ1 is usually 5 days.
3.What payment methods are accepted for TPS6281109QWRWYRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS6281109QWRWYRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS6281109QWRWYRQ1?
TPS6281109QWRWYRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS6281109QWRWYRQ1 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 TPS6281109QWRWYRQ1?
For technical support, including TPS6281109QWRWYRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS6281109QWRWYRQ1 requirements.
6.How does Aetrix verify that TPS6281109QWRWYRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS6281109QWRWYRQ1 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 TPS6281109QWRWYRQ1 meets industry standards.
7.What is the process for return or replacement of TPS6281109QWRWYRQ1?
All TPS6281109QWRWYRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS6281109QWRWYRQ1, 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 TPS6281109QWRWYRQ1 part is unused and in its original packaging.
Return procedure for TPS6281109QWRWYRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPS6281109QWRWYRQ1 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…
