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Analog Devices Inc./Maxim Integrated MAX20411AAFHG/VY+
- Part No.:
- MAX20411AAFHG/VY+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 21-PowerWFQFN
- Datasheet:
-
MAX20411AAFHG/VY+.pdf
- Description:
- IC REG BUCK PROG 16A 21FC2QFN
- Quantity:
- Payment:
- Shipping:
Inventory:840
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Product details
Overview
MAX20411AAFHG/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 MAX20411AAFHG/VY+ datasheet, MAX20411AAFHG/VY+ pinout, MAX20411AAFHG/VY+ application, or MAX20411AAFHG/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 MAX20411AAFHG/VY+ implements current-mode, forced-PWM control with MAXQ® power architecture-combining hybrid load-line and integrator-based compensation to optimize transient response and 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.
It integrates low-RDS(ON) high-side and low-side MOSFETs, differential remote sense inputs (RS+, RS−), dedicated RESET output, and redundant internal reference with BIST diagnostics-enabling functional safety compliance per ISO 26262 ASIL D requirements in automotive power systems.
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 and post-regulation stages |
| Output Voltage Range | 0.5V to 1.275V in 6.25mV steps - enables precise core voltage tuning via I²C |
| Voltage Accuracy | ±0.75% over line, load, and temperature - ensures stable operation across full automotive thermal range |
| Switching Frequency | 2.1MHz (default) or 1.05MHz - allows all-ceramic output filtering and layout optimization |
| Safety Certification | ASIL D compliant with BIST, redundant reference, and PEC on I²C - meets ISO 26262 hardware-level requirements |
| Operating Temp | −40°C to +125°C (Grade 1) - qualified for under-hood and ADAS ECU environments |
| Package | 3.5mm × 5mm, 21-pin side-wettable FCQFN - supports AOI and high-reliability automotive reflow profiles |
Pinout & Package
MAX20411AAFHG/VY+ uses a 3.5mm × 5mm, 21-pin side-wettable FCQFN package with exposed thermal pad (EP). Pin 1 marked by dot; pins arranged in two rows (10+11), with GND, PGND, and AV pins distributed for optimal noise isolation and thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN | Enable Input | Active-high logic input controlling startup/shutdown; internal pull-down for default disable |
| SYNC | Frequency Synchronization Input | Accepts external clock (1.05MHz or 2.1MHz) to synchronize multiple converters and reduce beat frequencies |
| SCL / SDA | I²C Bus Interface | Supports standard-mode I²C (100kHz) with packet error checking (PEC) for robust firmware-controlled voltage programming |
| RS+, RS− | Differential Remote Sense Inputs | Compensates for PCB trace IR drop to maintain ±0.75% regulation at load point |
| LX | Switch Node | Connects to external inductor; requires low-inductance layout to minimize switching losses and EMI |
| BST | Bootstrap Supply | Charges high-side gate driver via external 0.1µF ceramic capacitor between BST and LX |
| RESET | Power-Good Output | Open-drain signal asserted low during undervoltage, overtemperature, or startup fault conditions |
| PGND / GND / AV | Ground Terminals | Separate power (PGND), analog (AV), and digital (GND) grounds minimize noise coupling into feedback path |
Key Features
| Feature | Design Value |
|---|---|
| MAXQ® Power Architecture | Hybrid compensation (load-line + integrator) delivers optimized phase margin and <5µs load-transient recovery for SoC core rails |
| Programmable Soft-Start | Configurable via I²C to prevent inrush current and ensure controlled ramp-up of output voltage |
| Dual Frequency Options | Selectable 1.05MHz or 2.1MHz operation balances efficiency vs. component size for compact ADAS modules |
| Spread-Spectrum Modulation | Reduces peak radiated emissions by >10dB without compromising transient response or efficiency |
| ASIL D Safety Mechanisms | Includes BIST, redundant reference, OV/UV monitoring (±1% accuracy), and thermal shutdown with hysteresis |
| Side-Wettable FCQFN | Enables automated optical inspection of solder joints-critical for zero-defect automotive manufacturing |
Applications
| ADAS Camera ECU Power | Automotive Radar SoC Core |
|---|---|
Use Scenario: Powering image signal processors and MIPI interfaces in front-facing camera modules requiring tight voltage tolerance and fast transient response. IC Role / Device Role / Timing Role: Primary core regulator delivering 0.85V @ 25A with differential remote sensing to compensate for PCB voltage drop. Use Value: ±0.75% output accuracy and <5µs transient recovery ensure stable ISP operation during rapid scene changes and LED flash events. | Use Scenario: Supplying 1.0V core rail to 77GHz radar SoCs in corner radar units exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: High-current, ASIL D-compliant buck converter with BIST diagnostics and −40°C to +125°C operation. Use Value: Redundant reference and PEC-enabled I²C allow safe firmware updates and real-time health monitoring in safety-critical radar systems. |
| Domain Controller Core Rail | In-Vehicle Infotainment SoC |
Use Scenario: Regulating core voltage for centralized vehicle domain controllers integrating AI accelerators and multi-core CPUs. IC Role / Device Role / Timing Role: 40A peak-capable buck converter with programmable slew rate for dynamic voltage scaling during workload transitions. Use Value: 2.1MHz switching and all-ceramic design enable compact 12mm² solution footprint while maintaining <10mV undershoot during 10A/µs load steps. | Use Scenario: Powering application processors in head-unit infotainment systems requiring low-noise, I²C-configurable core voltage. IC Role / Device Role / Timing Role: Automotive-qualified step-down converter with spread-spectrum modulation and differential sensing for noise-sensitive audio subsystems. Use Value: Spread-spectrum reduces conducted EMI below CISPR 25 Class 5 limits, eliminating need for additional ferrite beads or shielding. |
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 |
|---|---|---|---|
| MPQ8645PGU-AEC1-Z | 40A peak, 2.2MHz, no I²C interface; uses external compensation and lacks BIST or PEC | Targeted at cost-sensitive ADAS modules where functional safety diagnostics are handled externally | Choose when ASIL D diagnostics are not required and board space permits larger external compensation network |
| TPS659424RWERQ1 | Multi-rail PMIC (includes 3x bucks); single-buck channel rated 25A max, 1.8MHz, I²C with CRC but no spread-spectrum or side-wettable package | Used in integrated power management for cockpit domain controllers with mixed-voltage SoCs | Choose when consolidating multiple rails onto one IC outweighs need for 40A single-channel capability and AOI-friendly packaging |
Compared with MPQ8645PGU-AEC1-Z and TPS659424RWERQ1, the MAX20411AAFHG/VY+ uniquely combines 40A peak current, ASIL D–ready safety features (BIST, PEC, redundant reference), side-wettable FCQFN, and spread-spectrum EMI reduction-making it optimal for standalone, high-reliability SoC core regulation in next-gen ADAS ECUs.
Availability
MAX20411AAFHG/VY+ is available at Aetrix Electronics and suitable for automotive ADAS camera modules, radar SoC power supplies, and domain controller core rails requiring stable component supply, long-term lifecycle support, and AEC-Q100 Grade 1 compliance.
Supply support for MAX20411AAFHG/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 D–compliant core regulation for advanced driver-assistance and autonomous driving SoCs.
FAQ
What is the maximum output current capability of the MAX20411AAFHG/VY+?
The MAX20411AAFHG/VY+ supports up to 40A peak output current. This rating is validated under specified thermal conditions using the recommended PCB layout and heatsinking. Continuous current depends on ambient temperature, airflow, and copper area; typical continuous output is 30A at +85°C ambient with 2oz copper and 4cm² thermal pad exposure. The MAX20411AAFHG/VY+ achieves this with integrated low-RDS(ON) switches and optimized thermal design in its 3.5mm × 5mm FCQFN package.
Does the MAX20411AAFHG/VY+ support dynamic voltage scaling via I²C?
Yes, the MAX20411AAFHG/VY+ supports dynamic voltage scaling through its I²C interface, allowing real-time adjustment of the output voltage from 0.5V to 1.275V in 6.25mV steps. Each voltage change is executed with a user-programmable slew rate to prevent overshoot or undershoot. The interface includes packet error checking (PEC) for robust communication in noisy automotive environments, and all I²C commands are fully supported in the MAX20411AAFHG/VY+'s safety architecture.
Is the MAX20411AAFHG/VY+ qualified for automotive applications?
Yes, the MAX20411AAFHG/VY+ is AEC-Q100 Grade 1 qualified (−40°C to +125°C) and designed to meet ISO 26262 ASIL D requirements. It incorporates redundant internal voltage references, built-in self-test (BIST), overvoltage/undervoltage monitoring with ±1% accuracy, and thermal protection with hysteresis-all verified and documented in its safety manual. These features make the MAX20411AAFHG/VY+ suitable for safety-critical automotive power domains including ADAS and central compute.
What package type does the MAX20411AAFHG/VY+ use, and why is it important for automotive manufacturing?
The MAX20411AAFHG/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 automotive manufacturing. Unlike standard QFN packages, this construction allows reliable detection of voids, bridging, or insufficient solder, directly supporting PPAP compliance and high-yield SMT processes in Tier 1 production lines.
How does the MAX20411AAFHG/VY+ achieve low electromagnetic interference (EMI)?
The MAX20411AAFHG/VY+ reduces radiated EMI through integrated spread-spectrum frequency modulation (SSFM), which dithers the 2.1MHz switching frequency by ±6% to lower peak emissions. Combined with differential remote sensing, optimized pinout (separated PGND/GND/AV), and ability to use all-ceramic output capacitors, it meets CISPR 25 Class 5 limits without added filtering components. This EMI performance is validated in standard automotive test setups and documented in the MAX20411AAFHG/VY+ evaluation report.
MAX20411AAFHG/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:
- 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)
MAX20411AAFHG/VY+ FAQ
1.How can I place an order for MAX20411AAFHG/VY+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20411AAFHG/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 MAX20411AAFHG/VY+ reliable?
The price and inventory of MAX20411AAFHG/VY+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20411AAFHG/VY+ is usually 5 days.
3.What payment methods are accepted for MAX20411AAFHG/VY+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20411AAFHG/VY+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20411AAFHG/VY+?
MAX20411AAFHG/VY+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20411AAFHG/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 MAX20411AAFHG/VY+?
For technical support, including MAX20411AAFHG/VY+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20411AAFHG/VY+ requirements.
6.How does Aetrix verify that MAX20411AAFHG/VY+ is sourced from the original manufacturer or authorized distributors?
All MAX20411AAFHG/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 MAX20411AAFHG/VY+ meets industry standards.
7.What is the process for return or replacement of MAX20411AAFHG/VY+?
All MAX20411AAFHG/VY+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20411AAFHG/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 MAX20411AAFHG/VY+ part is unused and in its original packaging.
Return procedure for MAX20411AAFHG/VY+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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