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Analog Devices Inc./Maxim Integrated MAX20411DAFHX/VY+T
- Part No.:
- MAX20411DAFHX/VY+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 21-PowerWFQFN
- Datasheet:
-
MAX20411DAFHX/VY+T.pdf
- Description:
- IC REG BUCK PROG 40A 21FC2QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,311
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Product details
Overview
MAX20411DAFHX/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, 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+T datasheet, MAX20411DAFHX/VY+T pinout, MAX20411DAFHX/VY+T application, or MAX20411DAFHX/VY+T equivalent, key selection criteria 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+T implements current-mode, forced-PWM control with MAXQ® power architecture-combining hybrid load-line and integrator-based compensation to achieve precision transient response and >60° phase margin. It supports dual switching frequencies (2.1MHz or 1.05MHz), spread-spectrum modulation, and PEC-enabled I²C interface with programmable slew rates for dynamic voltage scaling.
Differential remote sensing (RS+/RS−) enables accurate regulation under PCB IR drop; redundant internal reference and BIST diagnostics support functional safety requirements per ISO 26262 ASIL D. Overtemperature, short-circuit, and programmable OV/UV (±1% accuracy) protections are fully integrated.
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 5V rail and post-regulated supplies. |
| Output Voltage Range | 0.5V to 1.275V in 6.25mV steps - fine-grained I²C-programmable for dynamic voltage scaling. |
| Output Accuracy | ±0.75% over line/load/temperature - ensures stable operation across full automotive thermal range. |
| Switching Frequency | 2.1MHz (default) or 1.05MHz - enables all-ceramic design and reduces EMI filtering footprint. |
| Package | 3.5mm × 5mm, 21-pin FCQFN with side-wettable leads - supports AOI and meets AEC-Q100 reflow profile. |
| Functional Safety | ASIL D compliant with BIST, redundant reference, and PEC on I²C - satisfies ISO 26262 hardware requirements. |
Pinout & Package
MAX20411DAFHX/VY+T uses a 3.5mm × 5mm, 21-pin Flip-Chip Quad Flat No-Lead (FCQFN) package with side-wettable flanks for solder joint inspection. Pin functions are validated per Analog Devices' MAX20411 datasheet Rev 15.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN | Enable Input | Active-high logic control for power sequencing; supports precise startup timing in multi-rail systems. |
| RESET | Power-Good Output | Open-drain signal indicating valid VOUT within ±5% window; used for system reset coordination. |
| RS+, RS− | Differential Sense Inputs | Remote feedback path compensates PCB trace resistance; critical for <1% regulation error at point-of-load. |
| SDA, SCL | I²C Data/Clock | PEC-protected interface for dynamic voltage adjustment, fault logging, and telemetry readback. |
| LX | Switch Node | High-current connection to external inductor; requires low-inductance layout to minimize switching losses. |
| PGND, GND, AV | Ground Terminals | Separated power/ground domains isolate noise-sensitive analog circuitry from high di/dt paths. |
| BST | Bootstrap Supply | Charges high-side gate driver; requires 0.1µF ceramic capacitor between BST and LX. |
Key Features
| Feature | Design Value |
|---|---|
| MAXQ® Power Architecture | Hybrid load-line + integrator compensation delivers >60° phase margin and sub-10µs load-step recovery without external tuning. |
| Differential Remote Sensing | RS+/RS− inputs eliminate PCB IR drop impact, enabling ±0.75% regulation accuracy at SoC die surface. |
| ASIL D Functional Safety Support | Integrated BIST, redundant reference, and PEC on I²C satisfy hardware-level requirements for automotive safety-critical rails. |
| Spread-Spectrum Modulation | Reduces peak radiated emissions by >10dB across 150kHz–108MHz band, easing EMC certification for ADAS modules. |
| Side-Wettable FCQFN | 21-pin 3.5mm × 5mm package enables automated optical inspection of solder joints - required for automotive production traceability. |
Applications
| ADAS Sensor Fusion Module | Automotive SoC Core Rail |
|---|---|
Use Scenario: Powering radar/IMU fusion processors requiring rapid voltage scaling during active vs. sleep modes. IC Role / Device Role / Timing Role: Primary point-of-load regulator with I²C-controlled DVFS and RESET synchronization. Use Value: 40A peak current and 2.1MHz switching enable compact 2-phase-equivalent performance without multiphase complexity. | Use Scenario: Delivering stable 0.85V core supply to high-performance automotive SoCs under transient loads up to 30A/µs. IC Role / Device Role / Timing Role: High-accuracy, low-noise buck converter with differential remote sensing for die-level regulation. Use Value: ±0.75% output accuracy and sub-10µs transient response prevent SoC brownouts during burst computation. |
| Central Domain Controller | Automotive Camera ECU |
Use Scenario: Supplying multiple voltage domains (e.g., CPU, GPU, memory) via cascaded regulation from 5V bus. IC Role / Device Role / Timing Role: Post-regulator with programmable soft-start and OV/UV protection for system-level power integrity. Use Value: Dual-frequency option (1.05MHz) allows larger inductors for lower ripple in space-constrained central ECUs. | Use Scenario: Powering image signal processors and high-speed SerDes in surround-view camera modules. IC Role / Device Role / Timing Role: Low-EMI, AEC-Q100-compliant buck with spread-spectrum modulation for CISPR-25 Class 5 compliance. Use Value: Side-wettable FCQFN ensures solder joint reliability in thermally cycled camera housings (-40°C to +125°C). |
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 output, 2.2MHz fixed frequency, no I²C interface or BIST; QFN-18 package. | Lacks ASIL D support and dynamic voltage scaling; suitable for non-safety-critical 30A rails. | Select when functional safety and DVFS are not required, and board space permits larger external compensation network. |
| TPS62480QRHNRQ1 | 20A peak, 2.4MHz, I²C interface with telemetry but no BIST or spread-spectrum; 20-pin VQFN. | Lower current rating and no ASIL D certification; limited to mid-tier ADAS subsystems. | Choose for cost-sensitive designs where 20A suffices and diagnostic coverage is handled externally. |
Compared with MPQ4436-AEC1 and TPS62480QRHNRQ1, the MAX20411DAFHX/VY+T uniquely combines 40A capability, ASIL D compliance, differential sensing, and spread-spectrum EMI reduction in a side-wettable package-enabling single-chip solutions for high-end automotive SoC power where safety, density, and noise performance are co-constrained.
Availability
MAX20411DAFHX/VY+T is available at Aetrix Electronics and suitable for automotive ADAS sensor fusion modules, SoC core power delivery, central domain controllers, and camera ECUs requiring stable component supply with full AEC-Q100 Grade 1 traceability.
Supply support for MAX20411DAFHX/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 digital signal processing semiconductors, serving automotive, industrial, communications, and healthcare markets with precision power, sensing, and conversion technologies.
The MAX20411 family targets high-reliability automotive power delivery, specifically engineered for ASIL D-compliant SoC core rails in ADAS and autonomous driving systems where accuracy, transient response, and functional safety are non-negotiable.
FAQ
What is the maximum output current capability of the MAX20411DAFHX/VY+T?
The MAX20411DAFHX/VY+T delivers up to 40A peak output current, validated under AEC-Q100 Grade 1 conditions (−40°C to +125°C). This rating assumes proper PCB layout with adequate copper area, thermal vias, and recommended external components (e.g., 4×10µF input capacitors, low-ESR output capacitors). Continuous current depends on ambient temperature and airflow; derating curves are provided in the MAX20411 datasheet Rev 15.
Does the MAX20411DAFHX/VY+T support dynamic voltage scaling via I²C?
Yes, the MAX20411DAFHX/VY+T supports full dynamic voltage scaling over its 0.5V–1.275V range in 6.25mV steps using its PEC-enabled I²C interface. Slew rate is programmable to control ramp time during transitions, preventing overshoot or undershoot during SoC state changes. The interface also supports telemetry readback of voltage, temperature, and fault status - all confirmed in the device's register map.
Is the MAX20411DAFHX/VY+T qualified for automotive use?
Yes, the MAX20411DAFHX/VY+T is AEC-Q100 Grade 1 qualified (−40°C to +125°C) and ISO 26262 ASIL D compliant. It integrates BIST, redundant reference, and PEC on I²C to meet hardware-level safety goals. Its side-wettable FCQFN package supports automated optical inspection, satisfying automotive manufacturing traceability requirements per IATF 16949.
What package type and pin count does the MAX20411DAFHX/VY+T use?
The MAX20411DAFHX/VY+T uses a 3.5mm × 5mm, 21-pin Flip-Chip Quad Flat No-Lead (FCQFN) package with side-wettable flanks. This package is explicitly listed in the Ordering Information table of the MAX20411 datasheet Rev 15 and supports both reflow soldering and automated optical inspection for solder joint quality verification in automotive production lines.
How does the MAX20411DAFHX/VY+T achieve low electromagnetic emissions?
The MAX20411DAFHX/VY+T reduces radiated EMI through integrated spread-spectrum frequency modulation (SSFM) across its 2.1MHz switching frequency, lowering peak emissions by >10dB in the 150kHz–108MHz band. Combined with low-RDS(ON) integrated FETs, optimized gate drive, and differential remote sensing, it meets CISPR-25 Class 5 requirements without additional shielding - verified in Analog Devices' application report AN-2147.
MAX20411DAFHX/VY+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 21-PowerWFQFN
- Packaging:
- Tape & Reel (TR)
- 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+T FAQ
1.How can I place an order for MAX20411DAFHX/VY+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20411DAFHX/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 MAX20411DAFHX/VY+T reliable?
The price and inventory of MAX20411DAFHX/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 MAX20411DAFHX/VY+T is usually 5 days.
3.What payment methods are accepted for MAX20411DAFHX/VY+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20411DAFHX/VY+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20411DAFHX/VY+T?
MAX20411DAFHX/VY+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20411DAFHX/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 MAX20411DAFHX/VY+T?
For technical support, including MAX20411DAFHX/VY+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20411DAFHX/VY+T requirements.
6.How does Aetrix verify that MAX20411DAFHX/VY+T is sourced from the original manufacturer or authorized distributors?
All MAX20411DAFHX/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 MAX20411DAFHX/VY+T meets industry standards.
7.What is the process for return or replacement of MAX20411DAFHX/VY+T?
All MAX20411DAFHX/VY+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX20411DAFHX/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 MAX20411DAFHX/VY+T part is unused and in its original packaging.
Return procedure for MAX20411DAFHX/VY+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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