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Analog Devices Inc./Maxim Integrated MAX20411DAFHX/VY+
- Part No.:
- MAX20411DAFHX/VY+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 21-PowerWFQFN
- Datasheet:
-
MAX20411DAFHX/VY+.pdf
- Description:
- IC REG BUCK PROG 40A 21FC2QFN
- Quantity:
- Payment:
- Shipping:
Inventory:417
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Product details
Overview
MAX20411DAFHX/VY+ 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, featuring I²C-controlled voltage adjustment, ASIL D compliance, and 2.1MHz fixed-frequency PWM mode for ADAS SoC core power delivery.
For engineers reviewing the MAX20411DAFHX/VY+ datasheet, MAX20411DAFHX/VY+ pinout, MAX20411DAFHX/VY+ application, or MAX20411DAFHX/VY+ equivalent, key selection considerations include AEC-Q100 Grade 1 qualification, differential remote sensing capability, programmable soft-start, integrated BIST diagnostics, and side-wettable 21-pin FCQFN (3.5mm × 5mm) package for automated optical inspection.
Technical Context
The MAX20411DAFHX/VY+ 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 spread-spectrum frequency modulation to reduce EMI.
Differential remote voltage sensing (RS+/RS−), redundant internal reference, PEC-enabled I²C interface, and programmable overvoltage/undervoltage protection (±1% accuracy) are implemented to meet ASIL D functional safety requirements for automotive ADAS power rails.
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 domains and post-regulation from 12V buck stages. |
| Output Voltage Range | 0.5V to 1.275V in 6.25mV steps - enables precise core voltage tuning for AI accelerators and vision processors. |
| Switching Frequency | 2.1MHz (default) or 1.05MHz - allows all-ceramic output filtering and layout simplification while balancing efficiency vs. EMI. |
| Voltage Accuracy | ±0.75% over line/load/temperature - ensures stable operation across automotive thermal and supply variations. |
| Operating Temperature | −40°C to +125°C (Grade 1) - qualified per AEC-Q100 for under-hood and ADAS ECU environments. |
| Safety Certification | ASIL D compliant with BIST, redundant reference, and PEC on I²C - meets ISO 26262 hardware-level requirements. |
Pinout & Package
Package: 3.5mm × 5mm, 21-pin side-wettable FCQFN with exposed thermal pad (pin 21 = PGND). Designed for automated optical inspection (AOI) and high-reliability automotive reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN | Enable Input | Active-high logic control for power sequencing; supports controlled startup with programmable soft-start. |
| RESET | Power-Good Output | Open-drain signal indicating valid VOUT regulation; used for system reset coordination in SoC power-up sequences. |
| RS+, RS− | Differential Sense Inputs | Enable Kelvin sensing at load point to reject PCB IR drop and maintain ±0.75% regulation accuracy. |
| SDA, SCL | I²C Interface | Support dynamic voltage scaling with PEC error checking; required for closed-loop adaptive voltage control in ADAS processors. |
| BST | Bootstrap Supply | Connects to external 0.1µF capacitor to drive high-side MOSFET gate; enables efficient synchronous rectification. |
| LX | Switch Node | High-current switching node connecting to external inductor; requires low-inductance layout to minimize EMI and switching losses. |
| PGND / GND / AV | Ground Terminals | Separate power (PGND), analog (AV), and digital (GND) grounds isolate noise paths for precision feedback and I²C integrity. |
Key Features
| Feature | Design Value |
|---|---|
| MAXQ® Power Architecture | Hybrid load-line + integrator compensation delivers >60° phase margin and <10µs load-transient recovery for AI SoCs. |
| Differential Remote Sensing | Eliminates voltage error from PCB trace resistance-critical for maintaining sub-1% accuracy at 40A load currents. |
| ASIL D Functional Safety Support | Built-in BIST, redundant reference, and PEC-protected I²C enable single-chip compliance without external safety monitors. |
| Side-Wettable FCQFN | 21-pin 3.5mm × 5mm package enables AOI-compatible solder joint inspection for zero-defect automotive manufacturing. |
| Spread-Spectrum Modulation | Reduces peak radiated emissions by >10dB across 150kHz–108MHz band-simplifies EMC validation in radar/ADAS modules. |
Applications
| Automotive Radar ECU Power | ADAS Vision Processor Core Rail |
|---|---|
Use Scenario: High-current, low-noise power for 77GHz radar transceivers requiring tight voltage tolerance and fast transient response during chirp bursts. IC Role / Device Role / Timing Role: Primary step-down regulator supplying 0.85V core rail to mmWave radar SoC with differential remote sensing and ASIL D diagnostics. Use Value: ±0.75% output accuracy and 2.1MHz switching ensure stable RF PLL operation and minimal spectral splatter during rapid load steps. | Use Scenario: Dynamic voltage scaling for vision SoCs in surround-view or L2+ camera systems, where DVFS reduces power during low-activity frames. IC Role / Device Role / Timing Role: I²C-programmable buck converter delivering 0.6V–1.2V to image signal processors with 6.25mV resolution and slew-rate control. Use Value: Programmable soft-start and slew rate prevent inrush current and supply droop during frame-rate-dependent voltage transitions. |
| Central Domain Controller Core Supply | Automotive AI Accelerator Power |
Use Scenario: Centralized compute platform powering multi-core Arm Cortex-A clusters with coordinated power sequencing and fault reporting. IC Role / Device Role / Timing Role: High-current POL regulator with RESET output and EN-controlled sequencing for synchronized boot of heterogeneous cores. Use Value: RESET assertion timing aligns with SoC power-good requirements; EN delay programming enables staggered startup across multiple rails. | Use Scenario: Power delivery to automotive AI inference accelerators (e.g., NPU cores) demanding >30A peak current and sub-10µs transient recovery. IC Role / Device Role / Timing Role: 40A-capable buck converter using MAXQ architecture to sustain >92% efficiency at 0.75V/35A with minimal output capacitance. Use Value: Hybrid compensation maintains stability under wide load variation (1A–40A), avoiding external compensation components. |
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 |
|---|---|---|---|
| MPQ4436-AEC1 | 30A peak, 2.2MHz, no I²C or ASIL D support; lacks differential sensing and BIST. | Suitable for non-safety-critical ADAS peripherals (e.g., sensor hubs), not SoC core rails. | Select when functional safety and dynamic voltage scaling are not required. |
| TPS659413-Q1 | Multi-rail PMIC with 20A buck channel; integrates LDOs, sequencer, and watchdog-but no 40A single-channel option. | Used in full-featured domain controllers needing mixed-voltage outputs and centralized control. | Choose when consolidating multiple rails and safety monitoring into one IC outweighs single-rail efficiency. |
Compared with MPQ4436-AEC1 and TPS659413-Q1, the MAX20411DAFHX/VY+ uniquely combines 40A capacity, ASIL D compliance, I²C-based DVFS, and differential sensing in a single-channel automotive buck-enabling simplified, high-performance core power for next-gen ADAS SoCs without compromising safety or accuracy.
Availability
MAX20411DAFHX/VY+ is available at Aetrix Electronics and suitable for automotive ADAS radar ECUs, vision processor core supplies, central domain controller power rails, and AI accelerator modules requiring stable component supply, AEC-Q100 qualification, and long-term automotive lifecycle support.
Supply support for MAX20411DAFHX/VY+ 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, and communications markets with safety-certified, high-reliability solutions.
The MAX20411 family belongs to Analog Devices' automotive power management portfolio, designed specifically to deliver ultra-precise, high-current, ASIL-compliant DC-DC conversion for advanced driver-assistance systems and autonomous vehicle computing platforms.
FAQ
What is the maximum output current rating of the MAX20411DAFHX/VY+?
The MAX20411DAFHX/VY+ is rated for up to 40A peak output current. This rating is validated under specified thermal conditions with proper PCB layout and heatsinking. The device sustains this current continuously in typical automotive ambient conditions when mounted on a 4-layer board with 2oz copper and thermal vias to internal ground planes. Derating applies above +105°C ambient.
Does the MAX20411DAFHX/VY+ support dynamic voltage scaling via I²C?
Yes, the MAX20411DAFHX/VY+ supports dynamic voltage scaling through its PEC-enabled I²C interface. It allows real-time adjustment of the output voltage from 0.5V to 1.275V in precise 6.25mV steps, with programmable slew rates to prevent overshoot or undershoot during transitions. This capability is essential for optimizing power in vision SoCs and AI accelerators.
Is the MAX20411DAFHX/VY+ qualified for automotive use?
Yes, the MAX20411DAFHX/VY+ is AEC-Q100 Grade 1 qualified (−40°C to +125°C) and ASIL D compliant per ISO 26262. It includes built-in BIST, redundant voltage reference, and PEC-protected I²C communication-enabling use in safety-critical ADAS applications without external safety monitors.
What package type does the MAX20411DAFHX/VY+ use, and why is it significant?
The MAX20411DAFHX/VY+ uses a 3.5mm × 5mm, 21-pin side-wettable FCQFN package. Its side-wettable leads enable automated optical inspection (AOI) of solder joints-a critical requirement for zero-defect manufacturing in automotive electronics. The exposed thermal pad also enhances thermal performance in compact ECU designs.
How does the MAX20411DAFHX/VY+ achieve ±0.75% output voltage accuracy?
The MAX20411DAFHX/VY+ achieves ±0.75% output voltage accuracy through factory-trimmed internal reference, differential remote sensing (RS+/RS−), and precision feedback amplifier design. This accuracy is maintained across full load (0–40A), line (3.0V–5.5V), and temperature (−40°C to +125°C) ranges-ensuring reliable SoC operation in harsh automotive environments.
MAX20411DAFHX/VY+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 21-PowerWFQFN
- Packaging:
- Tray
- 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:
- 40A
- 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)
MAX20411DAFHX/VY+ FAQ
1.How can I place an order for MAX20411DAFHX/VY+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20411DAFHX/VY+ 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 MAX20411DAFHX/VY+ reliable?
The price and inventory of MAX20411DAFHX/VY+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20411DAFHX/VY+ is usually 5 days.
3.What payment methods are accepted for MAX20411DAFHX/VY+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20411DAFHX/VY+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20411DAFHX/VY+?
MAX20411DAFHX/VY+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20411DAFHX/VY+ 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 MAX20411DAFHX/VY+?
For technical support, including MAX20411DAFHX/VY+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20411DAFHX/VY+ requirements.
6.How does Aetrix verify that MAX20411DAFHX/VY+ is sourced from the original manufacturer or authorized distributors?
All MAX20411DAFHX/VY+ 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 MAX20411DAFHX/VY+ meets industry standards.
7.What is the process for return or replacement of MAX20411DAFHX/VY+?
All MAX20411DAFHX/VY+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20411DAFHX/VY+, 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 MAX20411DAFHX/VY+ part is unused and in its original packaging.
Return procedure for MAX20411DAFHX/VY+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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