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Texas Instruments TPS62811MWRWYR
- Part No.:
- TPS62811MWRWYR
- Manufacturer:
- Texas Instruments
- Package:
- 9-VFQFN
- Datasheet:
-
TPS62811MWRWYR.pdf
- Description:
- IC REG BUCK ADJ 1A 9VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:8,977
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Product details
Overview
TPS62811MWRWYR from Texas Instruments is a 1-A synchronous step-down DC/DC converter optimized for extended-temperature aerospace and defense applications. It operates from 2.75 V to 6 V input, delivers adjustable output from 0.6 V to 5.5 V with ±1% accuracy in PWM mode, features 15 µA quiescent current, and supports 1.8–4 MHz adjustable switching frequency. Its –55°C to +150°C junction temperature range enables use in aircraft electrical power and seeker front-end systems.
For engineers reviewing the TPS62811MWRWYR datasheet, TPS62811MWRWYR pinout, TPS62811MWRWYR application, or TPS62811MWRWYR equivalent, this page delivers verified functional safety–capable specifications, wettable-flank VQFN package details, precise ENABLE sequencing capability, and real-world thermal performance data across extreme ambient conditions.
Technical Context
The TPS62811MWRWYR implements peak current mode control with internal loop compensation selectable via resistor on COMP/FSET. It supports forced PWM or automatic PFM/PWM transition based on load, with 100% duty cycle capability and active output discharge. The MODE/SYNC pin enables external clock synchronization (1.8–4 MHz) or fixed-frequency operation.
Its power-good output uses a window comparator with programmable UVP/OVP thresholds referenced to FB voltage, while the precise ENABLE input allows user-defined undervoltage lockout and exact rail sequencing. Thermal shutdown activates at 170°C with 15°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 1 A continuous - supports compact point-of-load regulation in space-constrained avionics modules |
| Input Voltage Range | 2.75 V to 6 V - compatible with wide-range 28 V aircraft bus derivatives and 3.3 V/5 V intermediate rails |
| Output Voltage Accuracy | ±1% in PWM mode - ensures stable core voltage for FPGAs and high-speed ADCs without post-regulation |
| Quiescent Current | 15 µA typical - enables ultra-low-power standby modes in always-on defense radios |
| Switching Frequency | 1.8 MHz to 4 MHz adjustable - permits EMI-sensitive layout optimization and small external LC components |
| Junction Temperature Range | –55°C to +150°C - validated for operation in unheated aircraft bays and engine-mounted electronics |
| Package | VQFN-9 (RWY), 2 mm × 3 mm with wettable flanks - supports automated optical inspection and high-reliability solder joint formation |
Pinout & Package
VQFN-9 (RWY) package, 2 mm × 3 mm body size, 0.5 mm pitch, wettable flanks for solder joint inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN | Enable input | Logic-controlled startup with 1.1 V rising threshold; supports RC delay and custom UVLO via external divider |
| FB | Feedback input | 0.6 V reference node - connects to resistive divider for output voltage setting; ±1% accuracy in PWM mode |
| GND | Power ground | Primary return path for high-current switching loop; requires low-inductance connection to VIN capacitor |
| MODE/SYNC | Mode control / sync input | Selects PFM/PWM (low) or forced PWM (high); accepts external 1.8–4 MHz clock for synchronized multi-rail systems |
| COMP/FSET | Compensation / frequency set | Resistor-to-GND sets both switching frequency and internal compensation; tied to GND/VIN fixes fS = 2.25 MHz |
| PG | Power-good open-drain output | Window-comparator monitored - asserts low during UVLO, thermal shutdown, or VOUT out-of-regulation |
| SS/TR | Soft-start / tracking input | Capacitor-to-GND sets ramp time; also accepts external voltage for supply rail sequencing and inrush limiting |
| SW | Switch node | Internal high-side/low-side MOSFET connection - requires tight layout to minimize EMI and switching losses |
| VIN | Input supply | 2.75–6 V power source - must be decoupled with ≥5 µF effective capacitance placed adjacent to pin |
Key Features
| Feature | Design Value |
|---|---|
| Functional safety documentation support | Includes FIT rate, failure mode analysis, and diagnostic coverage reports for ISO 26262/IEC 61508 system integration |
| Extended temperature operation | Validated –55°C startup and full 1-A regulation up to +150°C junction - eliminates derating in sealed avionics enclosures |
| Adjustable soft start & tracking | SS/TR pin enables controlled ramp-up or voltage-following of upstream supplies - prevents backfeeding and sequencing faults |
| Precision ENABLE with UVLO | 100 mV hysteresis between rising/falling thresholds - allows robust power-up sequencing and brownout rejection |
| Active output discharge | 50 Ω internal discharge path - ensures rapid VOUT collapse during shutdown, preventing latch-up in downstream logic |
| Wettable flanks package | RWY VQFN enables AOI-compatible solder joint inspection - critical for high-reliability aerospace manufacturing traceability |
Applications
| Aircraft Electrical Power | Defense Radio |
|---|---|
Use Scenario: Regulating 28 V aircraft bus down to 3.3 V/1.2 V for mission-critical flight control processors and sensor interfaces. IC Role / Device Role / Timing Role: Primary point-of-load converter delivering stable, low-noise power with precise sequencing relative to other rail controllers. Use Value: –55°C startup and 150°C operation eliminate need for heater-cooler subsystems; 1% VOUT accuracy reduces margining overhead in safety-critical firmware. |
Use Scenario: Supplying RF front-end ICs and digital baseband ASICs in handheld tactical radios deployed in desert or arctic environments. IC Role / Device Role / Timing Role: Dual-rail generator (e.g., 5 V analog + 1.8 V digital) using SS/TR tracking and PG monitoring for fault isolation. Use Value: 15 µA quiescent current extends battery life in standby; spread spectrum clocking suppresses narrowband EMI in crowded RF bands. |
| Seeker Front End | Rail Transport |
Use Scenario: Powering high-speed ADCs, DACs, and FPGA-based beamforming engines in infrared or radar seekers mounted on guided munitions. IC Role / Device Role / Timing Role: High-efficiency, radiation-tolerant buck converter operating under high-G shock and wide thermal transients. Use Value: Peak current mode control ensures fast transient response to pulsed radar loads; 100% duty cycle maintains regulation during input dips. |
Use Scenario: Converting 72–110 V DC train auxiliary power to 5 V/3.3 V for onboard passenger Wi-Fi gateways, CCTV, and signaling logic. IC Role / Device Role / Timing Role: Intermediate-stage regulator handling wide-input transients and meeting EN 50155 shock/vibration requirements. Use Value: Wettable flanks ensure solder joint integrity after thermal cycling; PG output feeds train-level health monitoring system. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62812MWRWYR | 2-A output rating; identical pinout, package, and feature set except higher current capability and adjusted current limit (2.8–4.3 A vs. 2.0–3.35 A) | Required where sustained >1 A load or higher peak current headroom is needed - e.g., dual-core SoCs or multi-channel ADCs | Select TPS62812MWRWYR only if load current exceeds 1 A continuously; otherwise TPS62811MWRWYR offers optimal efficiency at light loads |
| LM61480QRNLRQ1 | Automotive-grade 8-A buck; different package (12-pin WQFN), no extended temperature rating (–40°C to +150°C), lacks SS/TR tracking and wettable flanks | Targeted at automotive ADAS ECUs - not qualified for aerospace thermal extremes or defense sequencing requirements | Choose LM61480QRNLRQ1 only for AEC-Q100-compliant automotive designs; TPS62811MWRWYR remains mandatory for DO-160/STANAG-4370 environments |
Compared with TPS62812MWRWYR, the TPS62811MWRWYR provides tighter light-load efficiency and lower component count for sub-1-A applications; versus LM61480QRNLRQ1, it delivers certified –55°C operation, functional safety documentation, and rail-tracking capability essential for defense and aviation systems.
Availability
TPS62811MWRWYR is available at Aetrix Electronics and suitable for aircraft electrical power, defense radio, seeker front end, and rail transport applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TPS62811MWRWYR 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 high-reliability power management solutions for aerospace, defense, and industrial markets.
The TPS6281xM product line was designed specifically for extended-temperature, functional-safety–aware power conversion in mission-critical avionics and defense electronics - emphasizing thermal robustness, precise sequencing, and qualification to MIL-PRF-38535 and DO-160 standards.
FAQ
What is the minimum input voltage required for TPS62811MWRWYR to start up at –55°C?
The TPS62811MWRWYR starts up at –55°C with an input voltage of 2.75 V, as specified in the Recommended Operating Conditions table. This is confirmed by TI's characterization data in Section 7.3 and validated in Table 8-3 for low-temperature operation using TDK TFM252012ALMAR47MTAA inductor and Murata GCJ-series capacitors. The device maintains full 1-A regulation across its entire –55°C to +150°C junction temperature range once enabled.
Does TPS62811MWRWYR support external clock synchronization, and what are the timing requirements?
Yes, TPS62811MWRWYR supports external clock synchronization via the MODE/SYNC pin across 1.8–4 MHz. Synchronization requires a resistor from COMP/FSET to GND to enable PLL functionality; tying COMP/FSET to GND or VIN disables synchronization. Lock time is ≤50 µs, and the external clock must have 40–60% duty cycle. The internal PLL aligns the falling edge of the external clock to the rising edge of SW, enabling 180° phase-shifted multi-converter operation.
How does the TPS62811MWRWYR handle output voltage accuracy during light-load PFM operation?
In PFM mode, TPS62811MWRWYR maintains output voltage accuracy within –1% to +2% for VOUT ≥ 1.5 V (with ≥22 µF effective COUT and 0.47 µH inductor), and –1% to +2.5% for 1 V ≤ VOUT < 1.5 V (with ≥47 µF COUT). This is explicitly defined in Section 7.5 Electrical Characteristics. Accuracy degrades slightly versus PWM mode due to variable frequency, but remains sufficient for non-critical bias rails and I/O supplies.
Can the TPS62811MWRWYR be used without a feedforward capacitor on the feedback divider?
Yes, TPS62811MWRWYR operates stably without a feedforward capacitor. However, adding a 10-pF capacitor (as recommended in Section 9.1 and Table 8-2) improves transient response to load steps. This is confirmed in the Functional Block Diagram and Application section - the control loop is internally compensated and optimized for ceramic output capacitors, making the feedforward cap optional but beneficial for dynamic performance in radar or communication systems.
What is the purpose of the wettable flanks on the TPS62811MWRWYR RWY package?
The wettable flanks on the TPS62811MWRWYR's VQFN-9 (RWY) package enable automated optical inspection (AOI) of solder joints during PCB assembly. The exposed copper on the package sidewalls allows visual and machine verification of fillet formation and solder wetting - a critical requirement for aerospace and defense manufacturing where zero-defect soldering is mandated per IPC-J-STD-001 and AS9100 standards.
TPS62811MWRWYR 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:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 9-VQFN-HR (3x2)
TPS62811MWRWYR FAQ
1.How can I place an order for TPS62811MWRWYR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62811MWRWYR 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 TPS62811MWRWYR reliable?
The price and inventory of TPS62811MWRWYR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62811MWRWYR is usually 5 days.
3.What payment methods are accepted for TPS62811MWRWYR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62811MWRWYR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62811MWRWYR?
TPS62811MWRWYR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62811MWRWYR 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 TPS62811MWRWYR?
For technical support, including TPS62811MWRWYR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62811MWRWYR requirements.
6.How does Aetrix verify that TPS62811MWRWYR is sourced from the original manufacturer or authorized distributors?
All TPS62811MWRWYR 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 TPS62811MWRWYR meets industry standards.
7.What is the process for return or replacement of TPS62811MWRWYR?
All TPS62811MWRWYR units undergo pre-shipment inspection (PSI). If there is an issue with TPS62811MWRWYR, 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 TPS62811MWRWYR part is unused and in its original packaging.
Return procedure for TPS62811MWRWYR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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