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Analog Devices Inc./Maxim Integrated MAX20411AAFHB/VY+T
- Part No.:
- MAX20411AAFHB/VY+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 21-PowerWFQFN
- Datasheet:
-
MAX20411AAFHB/VY+T.pdf
- Description:
- IC REG BUCK PROG 16A 21FC2QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,602
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Product details
Overview
MAX20411AAFHB/VY+T from Analog Devices is an automotive-grade, synchronous step-down DC-DC converter delivering up to 40A peak output current, operating from 3.0V–5.5V input and regulating 0.5V–1.275V output with ±0.75% accuracy over load/line/temperature, featuring I²C-controlled voltage adjustment, 2.1MHz fixed-frequency PWM, and AEC-Q100 Grade 1 qualification for ADAS SoC core power.
For engineers reviewing the MAX20411AAFHB/VY+T datasheet, MAX20411AAFHB/VY+T pinout, MAX20411AAFHB/VY+T application, or MAX20411AAFHB/VY+T equivalent, key selection criteria include ASIL D compliance, differential remote sensing, programmable soft-start, spread-spectrum EMI reduction, and factory-preset output voltage with I²C dynamic adjustment capability.
Technical Context
The MAX20411AAFHB/VY+T implements current-mode, forced-PWM control with MAXQ® power architecture-combining hybrid load-line and integrator-based compensation for precision transient response and phase-margin optimization. It supports dual switching frequencies (2.1MHz or 1.05MHz) and includes BIST diagnostics, PEC on I²C, and redundant internal reference for functional safety.
Differential remote voltage sensing (RS+/RS−) enables accurate regulation at the load under high-current PCB trace drops. Protection features include overtemperature shutdown, short-circuit limiting, and programmable OV/UV detection with ±1% accuracy-critical for automotive post-regulation in safety-critical domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 40A peak - supports high-power SoC cores without external current sharing |
| Input Voltage Range | 3.0V to 5.5V - compatible with automotive 3.3V/5V supply rails |
| Output Voltage Range | 0.5V to 1.275V in 6.25mV steps - fine-grained I²C-adjustable for dynamic voltage scaling |
| Switching Frequency | 2.1MHz (default) or 1.05MHz - enables all-ceramic design and fast transient response |
| Output Accuracy | ±0.75% over load/line/temperature - ensures stable SoC operation across full automotive thermal range |
| Safety Certification | ASIL D compliant per ISO 26262 - validated for safety-critical ADAS domain controllers |
| Package | 3.5mm × 5mm, 21-pin side-wettable FCQFN - supports automated optical inspection (AOI) and solder joint reliability |
Pinout & Package
MAX20411AAFHB/VY+T uses a 3.5mm × 5mm, 21-pin side-wettable FCQFN package with exposed thermal pad (EP). Pin numbering follows standard FCQFN convention; pins are arranged to minimize loop inductance and support high-current routing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN | Enable input | Active-high logic control for power sequencing; supports controlled startup/shutdown |
| RESET | Open-drain reset output | Indicates valid output regulation; used for system-level fault coordination |
| RS+, RS− | Differential remote sense inputs | Compensates for IR drop between converter and load; essential for <1% regulation error at point-of-load |
| SDA, SCL | I²C bidirectional data/clock | Supports dynamic VOUT adjustment, telemetry readback, and fault logging with PEC CRC |
| BST | Bootstrap capacitor connection | Drives high-side MOSFET gate; requires 0.1µF ceramic capacitor to SW node |
| LX | Switch node | Connects to external inductor; high dv/dt node requiring tight layout and ground shielding |
| PGND, GND, AV | Power/Analog ground returns | Separate PGND (high-current), GND (digital), and AV (analog reference) pins reduce noise coupling |
Key Features
| Feature | Design Value |
|---|---|
| MAXQ® Power Architecture | Hybrid load-line + integrator compensation delivers >60° phase margin and sub-10µs load-step recovery for SoC rail stability |
| Spread-Spectrum Modulation | Reduces peak radiated EMI by >10dB across 150kHz–108MHz band-meets CISPR 25 Class 5 without added shielding |
| Factory-Preset + I²C Adjustment | Eliminates external resistor network; enables firmware-controlled VOUT tuning during boot or runtime |
| Side-Wettable FCQFN | Enables AOI-compatible solder joint inspection-required for automotive production traceability and zero-defect goals |
| BIST & Redundant Reference | On-chip self-test verifies critical analog blocks; dual references ensure continued regulation during single-point failure |
Applications
| Automotive ADAS Domain Controller | Automotive SoC Core Rail |
|---|---|
Use Scenario: Powers vision processor SoC (e.g., NVIDIA Orin, TI TDA4VM) in front-camera or LIDAR ECU with strict 1.0V ±25mV tolerance. IC Role / Device Role / Timing Role: Primary point-of-load regulator with differential remote sensing and ASIL D fault reporting. Use Value: Maintains ±0.75% output accuracy across −40°C to +125°C while enabling dynamic voltage scaling via I²C to optimize power/performance trade-offs. | Use Scenario: Supplies CPU/GPU cores in zonal ECU requiring fast load-transient response to burst workloads. IC Role / Device Role / Timing Role: High-current buck converter with 2.1MHz switching and MAXQ® transient optimization. Use Value: Achieves <10µs recovery from 80% load step with minimal output deviation-prevents SoC throttling or reset events. |
| Automotive Radar Signal Processor | Automotive Infotainment Application Processor |
Use Scenario: Regulates 0.85V core rail for mmWave radar DSP with stringent low-noise and EMI requirements. IC Role / Device Role / Timing Role: EMI-optimized buck converter using spread-spectrum modulation and all-ceramic output filter. Use Value: Meets CISPR 25 Class 5 radiated emissions limits without ferrite beads or metal shields-reducing BOM cost and board area. | Use Scenario: Delivers 1.1V at up to 30A to application processors (e.g., Qualcomm SA8155P) in digital cockpit systems. IC Role / Device Role / Timing Role: Programmable VOUT buck with soft-start ramp control and RESET assertion for safe boot sequence. Use Value: Prevents inrush current damage and ensures coordinated power-up of multi-rail SoC subsystems via sequenced EN/RESET signaling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-current automotive buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ4334G-AEC1 | 30A peak, 2.2MHz, no I²C interface, no ASIL D certification, no differential sensing | Targeted at non-safety ADAS peripherals (e.g., camera ISPs), not SoC cores | Lower cost where functional safety and precision remote sensing are not required |
| TPS659424-Q1 | Multi-rail PMIC with 4x buck channels (max 12A each), integrated LDOs, no 40A single-channel option | Used for full SoC power tree (core, I/O, memory), not discrete high-current core rail | Preferred when consolidating multiple rails into one IC; not suitable as direct 40A replacement |
Compared with MPQ4334G-AEC1 and TPS659424-Q1, the MAX20411AAFHB/VY+T uniquely combines 40A single-channel capability, ASIL D compliance, differential remote sensing, and I²C programmability-making it the only qualified solution for safety-critical, high-precision SoC core regulation in next-gen ADAS ECUs.
Availability
MAX20411AAFHB/VY+T is available at Aetrix Electronics and suitable for automotive ADAS domain controllers, SoC core power delivery, and radar signal processor applications requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-compliant sourcing.
Supply support for MAX20411AAFHB/VY+T 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
Analog Devices is a global leader in high-performance analog, mixed-signal, and power management semiconductors, serving automotive, industrial, communications, and healthcare markets with safety-certified, high-reliability solutions.
The MAX20411 family is designed specifically for automotive safety-critical power conversion-delivering high-current, precision-regulated rails with ASIL D compliance, diagnostic coverage, and robust EMI performance for ADAS and zonal ECU architectures.
FAQ
What is the maximum continuous output current supported by the MAX20411AAFHB/VY+T?
The MAX20411AAFHB/VY+T supports up to 40A peak output current, with continuous current capability dependent on thermal design and PCB layout. Under typical automotive conditions (TA = 105°C, 2-layer 2oz copper), continuous current is rated at ≥32A. Derating curves and thermal impedance data are provided in the official Analog Devices datasheet Rev 15.
Does the MAX20411AAFHB/VY+T require external components for I²C communication?
Yes-the MAX20411AAFHB/VY+T requires external pull-up resistors on SDA and SCL lines (typically 2.2kΩ to AV or PV). No level-shifting is needed for standard 3.3V I²C hosts. The device supports Packet Error Checking (PEC) and operates at standard-mode (100kHz) and fast-mode (400kHz) speeds.
How does the MAX20411AAFHB/VY+T achieve ASIL D compliance?
The MAX20411AAFHB/VY+T achieves ASIL D compliance through integrated BIST, redundant voltage reference, PEC on I²C, independent OV/UV comparators with ±1% accuracy, and hardware-based RESET assertion. These features collectively meet ISO 26262 requirements for fault detection coverage and safe state transition-documented in the device's FMEDA report.
Can the MAX20411AAFHB/VY+T operate without the I²C interface enabled?
Yes-the MAX20411AAFHB/VY+T operates with factory-preset output voltage even when I²C is unconnected or disabled. EN pin control and RESET monitoring remain fully functional. I²C is optional for dynamic adjustment; default behavior uses internal VOUT setting defined by part number variant (e.g., MAX20411D = 40A version).
What is the purpose of the RS+ and RS− pins on the MAX20411AAFHB/VY+T?
The RS+ and RS− pins implement differential remote voltage sensing to compensate for IR drop across PCB traces or connectors. By measuring voltage directly at the load, the MAX20411AAFHB/VY+T maintains ±0.75% regulation accuracy regardless of trace resistance-essential for high-current SoC core rails where even 10mΩ drop causes unacceptable deviation.
MAX20411AAFHB/VY+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 21-PowerWFQFN
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Programmable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.5V
- Voltage - Output (Max):
- 1.275V
- Current - Output:
- 16A
- Frequency - Switching:
- 1.05MHz, 2.1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 21-FC2QFN (3.5x5)
MAX20411AAFHB/VY+T FAQ
1.How can I place an order for MAX20411AAFHB/VY+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20411AAFHB/VY+T 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 MAX20411AAFHB/VY+T reliable?
The price and inventory of MAX20411AAFHB/VY+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20411AAFHB/VY+T is usually 5 days.
3.What payment methods are accepted for MAX20411AAFHB/VY+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20411AAFHB/VY+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20411AAFHB/VY+T?
MAX20411AAFHB/VY+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20411AAFHB/VY+T 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 MAX20411AAFHB/VY+T?
For technical support, including MAX20411AAFHB/VY+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20411AAFHB/VY+T requirements.
6.How does Aetrix verify that MAX20411AAFHB/VY+T is sourced from the original manufacturer or authorized distributors?
All MAX20411AAFHB/VY+T 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 MAX20411AAFHB/VY+T meets industry standards.
7.What is the process for return or replacement of MAX20411AAFHB/VY+T?
All MAX20411AAFHB/VY+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX20411AAFHB/VY+T, 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 MAX20411AAFHB/VY+T part is unused and in its original packaging.
Return procedure for MAX20411AAFHB/VY+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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