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Analog Devices Inc./Maxim Integrated MAX20411AAFHA/VY+T
- Part No.:
- MAX20411AAFHA/VY+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 21-PowerWFQFN
- Datasheet:
-
MAX20411AAFHA/VY+T.pdf
- Description:
- IC REG BUCK PROG 16A 21FC2QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX20411AAFHA/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 MAX20411AAFHA/VY+T datasheet, MAX20411AAFHA/VY+T pinout, MAX20411AAFHA/VY+T application, or MAX20411AAFHA/VY+T equivalent, key selection considerations include AEC-Q100 Grade 1 qualification (-40°C to +125°C), side-wettable 21-pin FCQFN package, differential remote sensing, programmable soft-start, and integrated BIST diagnostics for functional safety-critical systems.
Technical Context
The MAX20411AAFHA/VY+T implements current-mode, forced-PWM control with MAXQ® power architecture-combining hybrid load-line and integrator 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 integrated to meet ASIL D requirements. RESET output and thermal shutdown provide system-level fault signaling and protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | Up to 40A peak - enables single-chip power delivery for high-performance automotive SoCs without parallel phases. |
| Input Voltage Range | 3.0V to 5.5V - compatible with 3.3V and 5V automotive supply rails, including post-regulation from buck-boost pre-regulators. |
| Output Voltage Range | 0.5V to 1.275V in 6.25mV steps - supports dynamic voltage scaling for AI accelerators and CPU cores. |
| Switching Frequency | 2.1MHz (default) or 1.05MHz - allows all-ceramic output filtering and minimizes solution size while maintaining transient performance. |
| Output Accuracy | ±0.75% over line, load, and temperature - ensures stable core voltage under wide automotive operating conditions. |
| Safety Certification | ASIL D compliant with BIST, redundant reference, and PEC on I²C - satisfies ISO 26262 hardware-level safety goals. |
| Package | 3.5mm × 5mm, 21-pin FCQFN with side-wettable leads - supports automated optical inspection (AOI) and high-reliability solder joint validation. |
Pinout & Package
MAX20411AAFHA/VY+T uses a 3.5mm × 5mm, 21-pin Flip-Chip Quad Flat No-Lead (FCQFN) package with side-wettable terminations for automotive-grade solder joint inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN | Enable input | Active-high logic control for full-cycle soft-start initiation and input UVLO override. |
| RESET | Open-drain power-good indicator | Asserts low when VOUT is within ±5% of target; used for SoC reset sequencing and fault reporting. |
| RS+, RS− | Differential remote sense inputs | Compensates for PCB IR drop to maintain ±0.75% regulation at point-of-load, critical for low-voltage SoC cores. |
| SDA, SCL | I²C bidirectional data/clock | Supports dynamic voltage adjustment, telemetry readback, and safety diagnostics with packet error checking (PEC). |
| BST | Bootstrap capacitor connection | Drives high-side MOSFET gate; requires 0.1µF ceramic capacitor between BST and LX for proper high-side driver operation. |
| LX | Switch node | Connects to external power inductor; high di/dt node requiring tight layout and minimized loop area. |
| PGND, GND, AV | Power ground / analog ground / analog supply | Separate ground domains isolate noise-sensitive analog circuitry (AV, RS±) from high-current power paths (PGND, LX). |
Key Features
| Feature | Design Value |
|---|---|
| MAXQ® Power Architecture | Hybrid load-line + integrator compensation enables >60° phase margin and <10µs load-step recovery without external tuning components. |
| Programmable Soft-Start | Configurable via I²C to prevent inrush current during power-up; eliminates need for external RC timing networks. |
| Spread-Spectrum Modulation | Reduces peak radiated EMI by >10dB across 150kHz–108MHz band, easing CISPR 25 Class 5 compliance in ADAS ECUs. |
| Integrated BIST Diagnostics | On-chip self-test verifies reference, ADC, and comparator functionality at startup and runtime-required for ASIL D diagnostic coverage. |
| Side-Wettable FCQFN | Exposed side-plated pins enable AOI-compatible solder joint inspection, improving field reliability in automotive production. |
Applications
| Automotive ADAS Camera ECU | Automotive Radar SoC Core Supply |
|---|---|
Use Scenario: Powers 12nm vision processor in front-facing camera module with dynamic voltage scaling across imaging modes. IC Role / Device Role / Timing Role: Primary core regulator delivering 0.75V–1.1V at up to 30A peak, synchronized to SoC DVFS commands via I²C. Use Value: ±0.75% output accuracy and differential remote sensing maintain timing margins under varying board trace resistance and temperature gradients. | Use Scenario: Supplies mmWave radar processor requiring fast load transients during chirp bursts and low-noise operation during signal acquisition. IC Role / Device Role / Timing Role: High-bandwidth, forced-PWM step-down converter with 2.1MHz switching and spread-spectrum EMI reduction. Use Value: Load-transient response <10µs and <15mV droop ensure radar ADC sampling stability during 10A step loads. |
| Automotive Domain Controller Core Rail | Automotive Infotainment Application Processor |
Use Scenario: Delivers configurable core voltage to multi-core domain controller managing vehicle motion planning and sensor fusion. IC Role / Device Role / Timing Role: ASIL D-compliant power stage with BIST, redundant reference, and PEC-secured I²C for functional safety monitoring. Use Value: Integrated diagnostics and fault signaling (RESET) support ISO 26262 FMEDA analysis and safe state entry during faults. | Use Scenario: Regulates GPU and NPU cores in infotainment head unit with dynamic voltage/frequency scaling based on UI workload. IC Role / Device Role / Timing Role: Programmable slew-rate I²C interface adjusts output voltage in 6.25mV steps without overshoot or instability. Use Value: Precise 6.25mV granularity enables optimal energy efficiency across diverse compute workloads while maintaining SoC timing closure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-current automotive step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ4436-AEC1 | 40A peak, 2.2MHz, no I²C interface; analog VSET only; lacks ASIL D certification and BIST. | Targeted at non-safety-critical ADAS peripherals where dynamic voltage scaling is not required. | Select when cost sensitivity outweighs functional safety and digital control needs. |
| TPS659424-Q1 | Multi-rail PMIC with 30A core rail; includes LDOs, sequencer, and watchdog-but larger 7×7mm QFN and higher BOM count. | Used in complex domain controllers needing multiple regulated rails and centralized power management. | Select when system requires integrated sequencing, monitoring, and auxiliary supplies beyond single-rail capability. |
Compared with MPQ4436-AEC1 and TPS659424-Q1, the MAX20411AAFHA/VY+T uniquely balances single-rail 40A capability, ASIL D compliance, I²C programmability, and minimal 3.5×5mm footprint-making it optimal for space-constrained, safety-critical SoC core supplies where discrete control and diagnostics are mandatory.
Availability
MAX20411AAFHA/VY+T is available at Aetrix Electronics and suitable for automotive ADAS camera modules, radar SoC power delivery, and domain controller core rails requiring stable component supply, long-term lifecycle support, and AEC-Q100 Grade 1 reliability.
Supply support for MAX20411AAFHA/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 robust, safety-certified solutions.
The MAX20411 family is part of Analog Devices' automotive power portfolio, engineered specifically for ASIL D-compliant, high-current point-of-load regulation in next-generation ADAS and autonomous driving systems.
FAQ
What is the maximum output current rating for the MAX20411AAFHA/VY+T?
The MAX20411AAFHA/VY+T is rated for up to 40A peak output current. This rating is validated under specified thermal conditions with recommended PCB layout and heatsinking. Continuous current capability depends on ambient temperature, airflow, and copper area; typical continuous operation is 30A at +85°C ambient with 2oz copper and 4-layer board. The MAX20411AAFHA/VY+T achieves this using integrated low-RDS(ON) FETs and optimized thermal pad design in its 3.5mm × 5mm FCQFN package.
Does the MAX20411AAFHA/VY+T support dynamic voltage scaling via I²C?
Yes, the MAX20411AAFHA/VY+T supports dynamic voltage scaling through its PEC-enabled I²C interface. Output voltage can be adjusted 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 efficiency in automotive SoCs that implement DVFS algorithms, and the MAX20411AAFHA/VY+T maintains ±0.75% regulation accuracy throughout the range.
Is the MAX20411AAFHA/VY+T qualified for automotive use?
Yes, the MAX20411AAFHA/VY+T is AEC-Q100 Grade 1 qualified (−40°C to +125°C) and ASIL D compliant per ISO 26262. It includes redundant voltage references, built-in self-test (BIST) diagnostics, PEC on I²C, and fault signaling via the RESET pin-all verified for functional safety in automotive applications. These features are integral to the MAX20411AAFHA/VY+T design and documented in its safety manual and FMEDA report.
What package type does the MAX20411AAFHA/VY+T use, and why is it important for automotive applications?
The MAX20411AAFHA/VY+T uses a 3.5mm × 5mm, 21-pin side-wettable FCQFN package. The side-wettable leads enable automated optical inspection (AOI) of solder joints-a critical requirement for zero-defect manufacturing in automotive electronics. This package also provides low thermal resistance (θJA ≈ 22°C/W) and excellent power delivery integrity, making the MAX20411AAFHA/VY+T suitable for high-reliability, high-current automotive power rails.
How does the MAX20411AAFHA/VY+T handle electromagnetic interference in sensitive ADAS environments?
The MAX20411AAFHA/VY+T reduces EMI using spread-spectrum frequency modulation (SSFM) across its 2.1MHz switching frequency, lowering peak radiated emissions by >10dB in the 150kHz–108MHz band. Combined with differential remote sensing, low-noise MAXQ® architecture, and optimized internal gate drivers, the MAX20411AAFHA/VY+T meets CISPR 25 Class 5 requirements without additional shielding-critical for camera and radar modules co-located near RF-sensitive receivers.
MAX20411AAFHA/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:
- 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)
MAX20411AAFHA/VY+T FAQ
1.How can I place an order for MAX20411AAFHA/VY+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20411AAFHA/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 MAX20411AAFHA/VY+T reliable?
The price and inventory of MAX20411AAFHA/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 MAX20411AAFHA/VY+T is usually 5 days.
3.What payment methods are accepted for MAX20411AAFHA/VY+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20411AAFHA/VY+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20411AAFHA/VY+T?
MAX20411AAFHA/VY+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20411AAFHA/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 MAX20411AAFHA/VY+T?
For technical support, including MAX20411AAFHA/VY+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20411AAFHA/VY+T requirements.
6.How does Aetrix verify that MAX20411AAFHA/VY+T is sourced from the original manufacturer or authorized distributors?
All MAX20411AAFHA/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 MAX20411AAFHA/VY+T meets industry standards.
7.What is the process for return or replacement of MAX20411AAFHA/VY+T?
All MAX20411AAFHA/VY+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX20411AAFHA/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 MAX20411AAFHA/VY+T part is unused and in its original packaging.
Return procedure for MAX20411AAFHA/VY+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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