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Analog Devices Inc./Maxim Integrated MAX20411BAFHD/VY+T
- Part No.:
- MAX20411BAFHD/VY+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 21-PowerWFQFN
- Datasheet:
-
MAX20411BAFHD/VY+T.pdf
- Description:
- IC REG BUCK PROG 22A 21FC2QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,269
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Product details
Overview
MAX20411BAFHD/VY+T from Analog Devices is an automotive-grade, synchronous step-down DC-DC converter delivering up to 22A peak output current, operating from 3.0V–5.5V input to 0.5V–1.275V output with ±0.75% accuracy, 2.1MHz fixed-frequency PWM, and I²C-controlled voltage adjustment in 6.25mV steps-designed for SoC core power in ADAS domain controllers.
For engineers reviewing the MAX20411BAFHD/VY+T datasheet, MAX20411BAFHD/VY+T pinout, MAX20411BAFHD/VY+T application, or MAX20411BAFHD/VY+T equivalent, key selection criteria include ASIL D compliance, differential remote sensing, programmable soft-start, RESET assertion, and side-wettable 21-pin FCQFN package for automated optical inspection in automotive production.
Technical Context
The MAX20411BAFHD/VY+T implements current-mode, forced-PWM control with MAXQ® power architecture-enabling hybrid load-line + integrator compensation for precision transient response and stable phase margin across temperature and load. It supports dual switching frequencies (2.1MHz or 1.05MHz) and integrates low RDS(ON) MOSFETs with spread-spectrum modulation to reduce EMI.
Differential remote voltage sensing (RS+/RS−), redundant internal reference, BIST diagnostics, and PEC-enabled I²C interface provide functional safety features required for ASIL D systems. Overtemperature, short-circuit, OV/UV (±1% accuracy), and thermal shutdown protections are fully integrated.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 22A peak - supports high-current SoC core rails without external current sharing. |
| Input Voltage Range | 3.0V to 5.5V - compatible with automotive 3.3V/5V supply domains and battery-backed pre-regulators. |
| Output Voltage Range | 0.5V to 1.275V in 6.25mV steps - enables precise dynamic voltage scaling for processors and AI accelerators. |
| Switching Frequency | 2.1MHz (default) or 1.05MHz - allows all-ceramic output filtering and layout optimization for EMI-sensitive ADAS modules. |
| Output Accuracy | ±0.75% over line, load, and –40°C to +125°C - ensures reliable operation under full automotive thermal stress. |
| Safety Certification | AEC-Q100 Grade 1, ASIL D compliant - meets ISO 26262 requirements for safety-critical power delivery. |
| I²C Interface | PEC-supported, slew-rate programmable - enables secure, glitch-immune dynamic voltage adjustment in real-time. |
Pinout & Package
MAX20411BAFHD/VY+T uses a 3.5mm × 5mm, 21-pin side-wettable FCQFN package with exposed thermal pad (pin 21 = PGND), optimized for automated optical inspection and high-reliability automotive reflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN | Enable input | Active-high logic control for power sequencing and system-level sleep/wake coordination. |
| RESET | Open-drain fault indicator | Asserts low on UV/OV/OT/SC faults; synchronizes with system reset controller. |
| RS+, RS− | Differential remote sense inputs | Compensates for PCB IR drop to maintain ±0.75% regulation at point-of-load. |
| SDA, SCL | I²C bidirectional data/clock | Supports dynamic VOUT adjustment, telemetry readback, and PEC-verified configuration. |
| BST | Bootstrap capacitor connection | Drives high-side FET gate; requires 0.1µF ceramic between BST and SW node. |
| LX | Power switch node | Connects to external inductor; high di/dt path requiring tight loop layout. |
| PGND, GND, AV | Ground terminals | Separate power (PGND), analog (AV), and digital (GND) returns minimize noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| MAXQ® Power Architecture | Enables hybrid load-line + integrator compensation for optimal transient response without external tuning components. |
| Differential Remote Sensing | Eliminates voltage error from PCB trace resistance, ensuring accurate regulation at processor die pads. |
| Spread-Spectrum Modulation | Reduces peak radiated emissions by >10dB, easing EMC compliance in dense ADAS ECUs. |
| ASIL D Functional Safety Support | Includes BIST, redundant reference, PEC-I²C, and diagnostic registers-fully documented for ISO 26262 FMEDA. |
| Side-Wettable FCQFN | Enables AOI-compatible solder joint inspection for zero-defect automotive manufacturing. |
Applications
| ADAS Domain Controller Core Power | Automotive Radar SoC Supply |
|---|---|
Use Scenario: Powers 12nm/7nm vision SoCs (e.g., NVIDIA Orin, TI TDA4VM) in front-camera or surround-view ECUs with dynamic DVFS. IC Role / Device Role / Timing Role: Primary core rail regulator with I²C-controlled VDD_CPU scaling and RESET synchronization. Use Value: ±0.75% accuracy and differential sensing ensure timing margin integrity across junction temperatures up to +125°C. | Use Scenario: Supplies mmWave radar processors (e.g., Infineon AURIX TC4x, NXP S32R) requiring fast load-transient response during chirp bursts. IC Role / Device Role / Timing Role: High-bandwidth point-of-load regulator with 2.1MHz PWM and MAXQ architecture for sub-1µs recovery. Use Value: Forced-PWM mode eliminates frequency variation during transients-critical for deterministic RF subsystem timing. |
| Central Gateway Processor Rail | Automotive Zonal ECU Power Hub |
Use Scenario: Delivers stable 0.85V/20A core voltage to ARM Cortex-A78/A715 clusters in vehicle gateway modules handling CAN FD/Ethernet routing. IC Role / Device Role / Timing Role: Safety-monitored buck converter with ASIL D diagnostics and dual-voltage monitoring (OV/UV). Use Value: Integrated BIST and PEC-I²C enable runtime self-test and secure firmware updates per UNECE R155 requirements. | Use Scenario: Serves as primary 1.0V/22A rail in zonal ECUs consolidating body, lighting, and HVAC control functions. IC Role / Device Role / Timing Role: High-efficiency post-regulator with thermal foldback and remote sensing for multi-rail distribution. Use Value: Side-wettable FCQFN and AEC-Q100 Grade 1 rating support 15-year automotive lifecycle with zero solder joint failures. |
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 |
|---|---|---|---|
| MPQ4436AGL-AEC1-Z | 18A peak, 2.2MHz, no I²C, no ASIL D certification, no differential sensing | Targeted at non-safety-critical infotainment rails; lacks BIST, PEC, and redundant reference | Lower-cost option where functional safety and precision remote sensing are not required |
| TPS65942412ARSMR | 16A peak, 2.2MHz, dual-output, includes PMIC companion LDOs, ASIL B certified | Designed for multi-rail SoC power with integrated sequencing; lacks 22A capability and spread-spectrum EMI reduction | Preferred when simultaneous core + I/O rail generation and simpler BOM are prioritized over single-rail peak current |
Compared with MPQ4436AGL-AEC1-Z and TPS65942412ARSMR, the MAX20411BAFHD/VY+T uniquely delivers 22A peak current with ASIL D compliance, differential sensing, and spread-spectrum EMI control-making it the only choice for safety-critical, high-precision ADAS core power where output accuracy and fault coverage are non-negotiable.
Availability
MAX20411BAFHD/VY+T is available at Aetrix Electronics and suitable for automotive ADAS domain controllers, radar SoC power supplies, and zonal ECU core rails requiring stable component supply, long-term automotive lifecycle support, and ASIL D-compliant sourcing.
Supply support for MAX20411BAFHD/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.
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 capability of the MAX20411BAFHD/VY+T?
The MAX20411BAFHD/VY+T is rated for 22A peak output current. This is the factory-configured capability for the 'B' variant in the MAX20411 family. It sustains this current under specified thermal conditions with appropriate PCB copper area and airflow, and is validated per AEC-Q100 Grade 1 requirements from –40°C to +125°C ambient.
Does the MAX20411BAFHD/VY+T support dynamic voltage scaling via I²C?
Yes, the MAX20411BAFHD/VY+T supports full I²C-controlled dynamic voltage scaling across its 0.5V–1.275V output range in precise 6.25mV steps. The interface includes packet error checking (PEC), programmable slew rates, and register-based telemetry readback-enabling safe, synchronized DVFS for automotive SoCs without external DACs or sequencers.
Is the MAX20411BAFHD/VY+T qualified for automotive use?
Yes, the MAX20411BAFHD/VY+T is AEC-Q100 Grade 1 qualified (–40°C to +125°C) and designed to meet ISO 26262 ASIL D requirements. It includes integrated BIST, redundant voltage reference, PEC-I²C, and diagnostic registers-fully documented for functional safety analysis in automotive safety cases.
What package type does the MAX20411BAFHD/VY+T use, and why is it significant?
The MAX20411BAFHD/VY+T uses a 3.5mm × 5mm, 21-pin side-wettable FCQFN package. This construction enables automated optical inspection (AOI) of solder joints-a critical requirement for zero-defect manufacturing in automotive electronics. The exposed thermal pad (pin 21 = PGND) also supports efficient heat dissipation in compact ECU layouts.
How does the MAX20411BAFHD/VY+T achieve low electromagnetic emissions?
The MAX20411BAFHD/VY+T reduces radiated EMI through integrated spread-spectrum frequency modulation (SSFM) across its 2.1MHz switching frequency. This dithers the fundamental clock edge energy, lowering peak emissions by >10dB-significantly easing compliance with CISPR 25 Class 5 limits in densely packed ADAS modules without added shielding or filtering.
MAX20411BAFHD/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:
- 22A
- 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)
MAX20411BAFHD/VY+T FAQ
1.How can I place an order for MAX20411BAFHD/VY+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20411BAFHD/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 MAX20411BAFHD/VY+T reliable?
The price and inventory of MAX20411BAFHD/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 MAX20411BAFHD/VY+T is usually 5 days.
3.What payment methods are accepted for MAX20411BAFHD/VY+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20411BAFHD/VY+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20411BAFHD/VY+T?
MAX20411BAFHD/VY+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20411BAFHD/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 MAX20411BAFHD/VY+T?
For technical support, including MAX20411BAFHD/VY+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20411BAFHD/VY+T requirements.
6.How does Aetrix verify that MAX20411BAFHD/VY+T is sourced from the original manufacturer or authorized distributors?
All MAX20411BAFHD/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 MAX20411BAFHD/VY+T meets industry standards.
7.What is the process for return or replacement of MAX20411BAFHD/VY+T?
All MAX20411BAFHD/VY+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX20411BAFHD/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 MAX20411BAFHD/VY+T part is unused and in its original packaging.
Return procedure for MAX20411BAFHD/VY+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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