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Analog Devices Inc./Maxim Integrated MAX20411DAFHF/VY+
- Part No.:
- MAX20411DAFHF/VY+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 21-PowerWFQFN
- Datasheet:
-
MAX20411DAFHF/VY+.pdf
- Description:
- IC REG BUCK PROG 40A 21FC2QFN
- Quantity:
- Payment:
- Shipping:
Inventory:225
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Product details
Overview
MAX20411DAFHF/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 and ASIL D compliance for SoC core power in ADAS systems.
For engineers reviewing the MAX20411DAFHF/VY+ datasheet, MAX20411DAFHF/VY+ pinout, MAX20411DAFHF/VY+ application, or MAX20411DAFHF/VY+ equivalent, key selection criteria include its 40A peak current capability, 2.1MHz fixed-frequency PWM operation, differential remote sensing, AEC-Q100 Grade 1 qualification, and factory-preset 1.0V output with I²C programmability.
Technical Context
The MAX20411DAFHF/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 2.1MHz or 1.05MHz switching via SYNC pin configuration.
Differential remote voltage sensing (RS+/RS−), integrated low-RDS(ON) FETs, spread-spectrum frequency modulation, and PEC-enabled I²C interface enable robust EMI performance, high efficiency at heavy loads, and functional safety diagnostics including BIST and redundant reference monitoring.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 40A peak - supports high-power SoC core rails without external current sharing. |
| Input Voltage Range | 3.0V to 5.5V - compatible with automotive 5V supply rails and post-regulation stages. |
| Output Voltage Range | 0.5V to 1.275V in 6.25mV steps - enables precise core voltage tuning for advanced processors. |
| Switching Frequency | 2.1MHz (default) or 1.05MHz - allows all-ceramic output filtering and layout simplification. |
| Output Accuracy | ±0.75% over line/load/temperature - ensures stable core voltage under dynamic automotive conditions. |
| Safety Certification | ASIL D compliant with BIST, PEC, redundant reference - meets ISO 26262 requirements for safety-critical ADAS power rails. |
| Operating Temp | −40°C to +125°C (Grade 1) - qualified for under-hood and radar/EU ECU environments. |
Pinout & Package
Package: 3.5mm × 5mm, 21-pin side-wettable FCQFN (Fine Pitch Chip-scale Quad Flat No-lead) with exposed thermal pad - optimized for automotive thermal cycling reliability and automated optical inspection (AOI).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN | Enable Input | Active-high logic control for full device power-up sequencing and fault recovery. |
| RESET | Power-Good Output | Open-drain signal indicating valid output regulation and internal health status. |
| RS+, RS− | Differential Sense Inputs | Enable accurate remote voltage measurement at load point, rejecting PCB IR drop. |
| SDA, SCL | I²C Bidirectional Interface | Support dynamic VOUT adjustment, telemetry readback, and safety register access with PEC. |
| LX | Switch Node | Connects to external inductor; requires low-inductance routing to minimize switching loss and EMI. |
| BST | Bootstrap Supply | Charges high-side gate driver; requires 0.1µF ceramic capacitor to SW node. |
| PGND, GND, AV | Ground Terminals | Separate power, analog, and ground return paths reduce noise coupling in sensitive feedback loops. |
Key Features
| Feature | Design Value |
|---|---|
| MAXQ® Power Architecture | Enables hybrid load-line + integrator compensation for optimal transient response without external tuning components. |
| Spread-Spectrum Modulation | Reduces peak radiated emissions by dithering switching frequency-critical for CISPR 25 Class 5 compliance. |
| Factory-Preset Output | MAX20411DAFHF/VY+ is preset to 1.0V - eliminates external resistor network and reduces BOM count. |
| Programmable Soft-Start | Configurable via I²C to prevent inrush current during power-up of large SoC capacitive loads. |
| Overvoltage/Undervoltage Protection | ±1% accuracy OV/UV detection on VOUT - provides fast, precise fault response independent of feedback divider. |
Applications
| Automotive Radar ECU Power | ADAS Domain Controller Core Rail |
|---|---|
Use Scenario: Powers 77GHz radar SoC requiring tight voltage tolerance and fast load-step response during chirp sequences. IC Role / Device Role / Timing Role: Primary point-of-load regulator delivering 1.0V @ 35A peak with <500ns transient recovery. Use Value: Differential sensing and MAXQ architecture maintain ±0.75% regulation across temperature and load transients critical for RF signal integrity. | Use Scenario: Supplies multi-core AI accelerator in centralized ADAS domain controller with dynamic DVFS. IC Role / Device Role / Timing Role: I²C-programmable core rail enabling real-time voltage scaling based on workload and thermal headroom. Use Value: 6.25mV I²C steps and programmable slew rate allow precise, glitch-free voltage transitions without system-level reset. |
| Automotive Camera ISP Power | High-Performance MCU Core Supply |
Use Scenario: Powers image signal processor in surround-view camera module with strict EMI limits. IC Role / Device Role / Timing Role: 2.1MHz fixed-frequency PWM regulator using all-ceramic output filter to meet CISPR 25 conducted/noise requirements. Use Value: Spread-spectrum modulation and side-wettable QFN package reduce radiated emissions while enabling AOI-compatible assembly. | Use Scenario: Delivers stable 1.0V core supply to high-clock-speed automotive MCU (e.g., S32K3/S32G) during CAN FD and Ethernet traffic bursts. IC Role / Device Role / Timing Role: ASIL D-compliant regulator with BIST and redundant reference ensuring safe power delivery during functional safety monitoring cycles. Use Value: RESET output and PEC-protected I²C interface support ISO 26262 diagnostic coverage for MCU power domain. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-current automotive buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ4436-AEC1 | 36A peak, 2.2MHz, no I²C, no ASIL D certification, single-loop control | Lacks BIST, PEC, and redundant reference; suitable for non-safety-critical ADAS sub-systems | Select when cost sensitivity outweighs functional safety requirements and I²C telemetry is unnecessary. |
| TPS659424-Q1 | Multi-rail PMIC with 30A buck channel, 1.8MHz, I²C, ASIL B rated | Integrated multi-rail solution with lower per-rail current; not a single-channel 40A replacement | Choose when consolidating multiple rails into one IC is preferred over discrete high-current optimization. |
Compared with MPQ4436-AEC1 and TPS659424-Q1, the MAX20411DAFHF/VY+ uniquely delivers 40A peak current with ASIL D compliance, differential sensing, and factory-preset 1.0V output-making it optimal for safety-critical, high-power SoC core rails where precision, diagnostics, and layout simplicity are prioritized.
Availability
MAX20411DAFHF/VY+ is available at Aetrix Electronics and suitable for automotive radar ECUs, ADAS domain controllers, surround-view camera ISPs, and high-performance MCU core supplies requiring stable component supply, AEC-Q100 qualification, and long-term lifecycle support.
Supply support for MAX20411DAFHF/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 targets automotive power delivery for ADAS and autonomous driving systems, designed specifically to meet ASIL D requirements, AEC-Q100 Grade 1 operation, and high-current point-of-load needs in space-constrained ECUs.
FAQ
What is the factory-preset output voltage of the MAX20411DAFHF/VY+?
The MAX20411DAFHF/VY+ is factory-preset to 1.0V output. This fixed setting eliminates the need for external feedback resistors and simplifies design-in for standard SoC core rails. The I²C interface still allows dynamic adjustment within the 0.5V–1.275V range if required during system operation or calibration.
Does the MAX20411DAFHF/VY+ support spread-spectrum frequency modulation?
Yes, the MAX20411DAFHF/VY+ includes spread-spectrum frequency modulation to reduce peak radiated EMI. This feature is enabled via register configuration over I²C and helps achieve CISPR 25 Class 5 compliance without additional shielding or filtering components in automotive radar and camera applications.
Is the MAX20411DAFHF/VY+ qualified for automotive use?
Yes, the MAX20411DAFHF/VY+ is AEC-Q100 Grade 1 qualified (−40°C to +125°C) and ASIL D compliant per ISO 26262. It includes BIST, redundant reference, PEC-protected I²C, and hardware-based OV/UV protection-making it suitable for safety-critical ADAS power domains.
What package type does the MAX20411DAFHF/VY+ use, and why is it important for automotive applications?
The MAX20411DAFHF/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-and improve thermal cycling reliability in under-hood environments.
How does the MAX20411DAFHF/VY+ handle load transients in ADAS SoC applications?
The MAX20411DAFHF/VY+ achieves excellent load-transient performance using MAXQ® power architecture with hybrid load-line and integrator compensation. Combined with differential remote sensing (RS+/RS−), it maintains ±0.75% output regulation during rapid load steps typical in radar chirp or AI accelerator burst modes-without requiring external compensation components.
MAX20411DAFHF/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)
MAX20411DAFHF/VY+ FAQ
1.How can I place an order for MAX20411DAFHF/VY+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20411DAFHF/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 MAX20411DAFHF/VY+ reliable?
The price and inventory of MAX20411DAFHF/VY+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20411DAFHF/VY+ is usually 5 days.
3.What payment methods are accepted for MAX20411DAFHF/VY+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20411DAFHF/VY+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20411DAFHF/VY+?
MAX20411DAFHF/VY+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20411DAFHF/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 MAX20411DAFHF/VY+?
For technical support, including MAX20411DAFHF/VY+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20411DAFHF/VY+ requirements.
6.How does Aetrix verify that MAX20411DAFHF/VY+ is sourced from the original manufacturer or authorized distributors?
All MAX20411DAFHF/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 MAX20411DAFHF/VY+ meets industry standards.
7.What is the process for return or replacement of MAX20411DAFHF/VY+?
All MAX20411DAFHF/VY+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20411DAFHF/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 MAX20411DAFHF/VY+ part is unused and in its original packaging.
Return procedure for MAX20411DAFHF/VY+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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