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Texas Instruments TPS62811QWRWYRQ1
- Part No.:
- TPS62811QWRWYRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 9-VFQFN
- Datasheet:
-
TPS62811QWRWYRQ1.pdf
- Description:
- IC REG BUCK ADJ 1A 9VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,833
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Product details
Overview
TPS62811QWRWYRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive synchronous step-down DC/DC converter delivering up to 1 A continuous output current, operating from 2.75 V to 6 V input, with 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 serves as a primary power supply for infotainment processors and ADAS sensor fusion ECUs.
For engineers reviewing the TPS62811QWRWYRQ1 datasheet, TPS62811QWRWYRQ1 pinout, TPS62811QWRWYRQ1 application, or TPS62811QWRWYRQ1 equivalent, key selection criteria include its 15 µA quiescent current, forced-PWM/PFM mode flexibility, precise ENABLE threshold for sequencing, active output discharge, and wettable-flank VQFN-9 package for automotive-grade solder joint inspection.
Technical Context
The TPS62811QWRWYRQ1 implements peak current mode control with internal loop compensation selectable via resistor on COMP/FSET, enabling stable operation across 15 µF–470 µF output capacitance ranges. Its MODE/SYNC pin supports both PFM/PWM auto-mode transition and external clock synchronization (1.8–4 MHz) with sub-50 µs lock time.
It integrates low-RDS(on) MOSFETs (HS: 37–60 mΩ, LS: 15–35 mΩ at VIN ≥ 5 V), 100% duty cycle capability, and a dedicated SS/TR pin enabling programmable soft-start ramp or voltage tracking for rail sequencing-critical for multi-rail automotive SoC power-up.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.75 V to 6 V - supports direct connection to automotive battery (cold-crank tolerant down to 2.75 V) |
| Output Current | 1 A continuous - sufficient for powering single-core MCU or FPGA I/O banks in cluster or telematics applications |
| Feedback Accuracy | ±1% in PWM mode - enables tight regulation of core voltages (e.g., 1.2 V ±12 mV) without post-regulation |
| Quiescent Current | 15 µA typical - extends battery life during vehicle sleep modes (e.g., infotainment standby) |
| Switching Frequency | 1.8 MHz to 4 MHz adjustable - allows EMI optimization and use of compact 0.33–0.47 µH inductors |
| Operating Junction Temp | –40 °C to +150 °C - meets AEC-Q100 Grade 1 requirements for under-hood and dashboard environments |
| Power-Good Output | Open-drain PG with window comparator (±5% VFB UVP/OVP) - provides reliable system reset signaling |
Pinout & Package
The TPS62811QWRWYRQ1 is housed in a 3 mm × 2 mm VQFN package with wettable flanks (RWY, 9-pin), enabling automated optical inspection (AOI) of solder joints in automotive production.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN | Enable input | Logic-controlled startup with precise 1.06–1.15 V rising threshold; supports RC-delayed power-on and user-defined UVLO |
| FB | Feedback input | Connects to resistive divider for adjustable VOUT; 0.6 V reference enables 0.6–5.5 V output range |
| GND | Power ground | Primary return path for high-current switch node and control circuitry; requires low-inductance PCB layout |
| MODE/SYNC | Mode select / sync input | Pull-low for PFM/PWM auto-mode; pull-high for forced PWM; accepts external 1.8–4 MHz clock for EMI reduction |
| COMP/FSET | Compensation & frequency set | Resistor-to-GND sets both loop compensation and fSW; tied to GND/VIN fixes fSW at 2.25 MHz |
| PG | Power-good output | Open-drain flag indicating regulated output within ±5% VFB; used for processor reset or rail sequencing |
| SS/TR | Soft-start / tracking input | Capacitor-to-GND sets startup ramp time; voltage injection enables output tracking of master rail |
| SW | Switch node | Internal HS/LS MOSFET connection point; requires low-ESR ceramic capacitor and tight layout to minimize ringing |
| VIN | Input supply | Accepts 2.75–6 V; must be decoupled with ≥5 µF effective capacitance placed adjacent to pin |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40 °C to +125 °C ambient operation - suitable for front-end infotainment head units and ADAS domain controllers |
| Active output discharge | Integrated 50 Ω discharge path - ensures rapid VOUT collapse during shutdown, preventing back-powering of downstream logic |
| Adjustable soft-start & tracking | SS/TR pin supports either fixed ramp (via CSS) or external voltage tracking - enables controlled power-up sequencing across multiple rails |
| Forced PWM or auto PFM/PWM mode | Eliminates low-load frequency modulation - maintains consistent EMI profile during light-load operation (e.g., display backlight dimming) |
| Wettable flanks package | RWY (VQFN-9) with side-wettable leads - enables AOI-compatible solder joint verification required for automotive safety-critical assemblies |
Applications
| Infotainment Head Unit | Hybrid Reconfigurable Cluster |
|---|---|
Use Scenario: Powers application processor, display interface, and audio codec in centralized automotive infotainment systems. IC Role / Device Role / Timing Role: Primary 1.2 V/1.8 V/3.3 V buck regulator supplying SoC core and I/O domains. Use Value: 15 µA quiescent current extends battery hold-up time during ignition-off; ±1% VFB accuracy avoids need for external LDO post-regulation. | Use Scenario: Supplies reconfigurable graphics controller and instrument cluster MCU requiring synchronized rail startup. IC Role / Device Role / Timing Role: Adjustable-output buck converter with SS/TR pin used for voltage tracking of main 5 V rail. Use Value: Programmable soft-start prevents inrush current exceeding fuse rating; PG output triggers cluster boot sequence only after stable VOUT. |
| Telematics Control Unit | Surround View ECU |
Use Scenario: Delivers clean 1.1 V core and 1.8 V I/O supplies to LTE/C-V2X modem SoC in telematics gateway. IC Role / Device Role / Timing Role: High-efficiency buck converter operating in forced PWM mode to suppress EMI near RF antennas. Use Value: 1.8–4 MHz adjustable switching frequency allows tuning away from cellular band harmonics; wettable flanks ensure IPC Class 3 assembly reliability. | Use Scenario: Powers image signal processor (ISP) and MIPI CSI-2 serializer in 4-camera surround-view processing module. IC Role / Device Role / Timing Role: 1 A buck converter providing 1.2 V ISP core rail with fast transient response enabled by COMP/FSET compensation tuning. Use Value: Peak current mode control + optimized compensation delivers <10 µs load-step recovery; PG flag validates rail stability before camera initialization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62810QWRWYRQ1 | 4 A output current; identical pinout, package, and feature set | Suitable for higher-power SoCs (e.g., quad-core application processors); requires larger inductor and output capacitors | Select when >1 A load current or future-proofing for higher-performance variants is required |
| TPS62812QWRWYRQ1 | 2 A output current; same RWY package, pin-compatible, identical control features | Optimized for dual-core MCUs or mid-tier ADAS sensors; balances cost and thermal margin vs. TPS62811QWRWYRQ1 | Choose for 1.2–1.8 A average loads where 1 A margin is insufficient but 2 A headroom is acceptable |
Compared with TPS62810QWRWYRQ1 and TPS62812QWRWYRQ1, the TPS62811QWRWYRQ1 offers optimal thermal and layout efficiency for 0.8–1.2 A automotive subsystems-reducing BOM cost versus the 2 A/4 A variants while maintaining full functional compatibility and AEC-Q100 compliance.
Availability
TPS62811QWRWYRQ1 is available at Aetrix Electronics and suitable for infotainment head units, hybrid reconfigurable clusters, telematics control units, and surround view ECUs requiring stable component supply across automotive production lifecycles.
Supply support for TPS62811QWRWYRQ1 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 functional safety documentation support.
The TPS6281x-Q1 product line was designed specifically for automotive power management in infotainment, digital cluster, and ADAS applications-emphasizing AEC-Q100 compliance, low IQ, high efficiency across load range, and robust thermal performance in compact packages.
FAQ
What is the maximum continuous output current supported by the TPS62811QWRWYRQ1?
The TPS62811QWRWYRQ1 supports up to 1 A continuous output current at ambient temperatures up to +125 °C, enabled by low RDS(on) MOSFETs (HS: 37–60 mΩ, LS: 15–35 mΩ) and optimized thermal design in the 3 mm × 2 mm VQFN package. Derating applies above +125 °C ambient per the device's thermal metrics (RθJA = 71.1 °C/W).
Does the TPS62811QWRWYRQ1 support external clock synchronization, and what is the valid frequency range?
Yes, the TPS62811QWRWYRQ1 supports external clock synchronization via the MODE/SYNC pin across 1.8 MHz to 4 MHz. Synchronization requires a resistor from COMP/FSET to GND; if COMP/FSET is tied directly to GND or VIN, external sync is disabled. Lock time to external clock is typically 50 µs, with phase alignment referenced to SW rising edge.
How does the SS/TR pin function in tracking mode for rail sequencing with the TPS62811QWRWYRQ1?
In tracking mode, the SS/TR pin accepts an external voltage reference (e.g., from another regulator's output). The TPS62811QWRWYRQ1's internal error amplifier compares FB to a scaled version of SS/TR, forcing VOUT to track the reference with 1× gain and 17 mV offset. This enables precise sequencing of dependent rails without additional ICs.
What is the purpose of the wettable flanks on the TPS62811QWRWYRQ1 package, and why is it important for automotive use?
The wettable flanks on the TPS62811QWRWYRQ1's RWY (VQFN-9) package expose solderable metal on the vertical side walls, enabling automated optical inspection (AOI) of solder joint integrity. This is mandatory for IPC Class 3 and automotive safety-critical assemblies (e.g., ISO 26262 ASIL-B systems) to verify void-free interconnects without destructive testing.
Can the TPS62811QWRWYRQ1 operate in 100% duty cycle mode, and under what conditions is this useful?
Yes, the TPS62811QWRWYRQ1 supports 100% duty cycle operation when VOUT ≥ VIN – Vdropout, allowing dropout-free regulation down to VIN – 0.3 V. This is critical during cold-crank events (e.g., 6 V battery dip to 3.2 V) where maintaining 3.3 V or 2.5 V output without interruption ensures uninterrupted operation of safety-critical microcontrollers.
TPS62811QWRWYRQ1 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)
TPS62811QWRWYRQ1 FAQ
1.How can I place an order for TPS62811QWRWYRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62811QWRWYRQ1 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 TPS62811QWRWYRQ1 reliable?
The price and inventory of TPS62811QWRWYRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62811QWRWYRQ1 is usually 5 days.
3.What payment methods are accepted for TPS62811QWRWYRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62811QWRWYRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62811QWRWYRQ1?
TPS62811QWRWYRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62811QWRWYRQ1 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 TPS62811QWRWYRQ1?
For technical support, including TPS62811QWRWYRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62811QWRWYRQ1 requirements.
6.How does Aetrix verify that TPS62811QWRWYRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS62811QWRWYRQ1 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 TPS62811QWRWYRQ1 meets industry standards.
7.What is the process for return or replacement of TPS62811QWRWYRQ1?
All TPS62811QWRWYRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS62811QWRWYRQ1, 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 TPS62811QWRWYRQ1 part is unused and in its original packaging.
Return procedure for TPS62811QWRWYRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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