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Analog Devices Inc./Maxim Integrated MAX20411BAFHB/VY+T
- Part No.:
- MAX20411BAFHB/VY+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 21-PowerWFQFN
- Datasheet:
-
MAX20411BAFHB/VY+T.pdf
- Description:
- IC REG BUCK PROG 22A 21FC2QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,978
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Product details
Overview
MAX20411BAFHB/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% voltage accuracy, 2.1MHz fixed-frequency PWM operation, and ASIL D compliance for SoC core power in ADAS systems.
For engineers reviewing the MAX20411BAFHB/VY+T datasheet, MAX20411BAFHB/VY+T pinout, MAX20411BAFHB/VY+T application, or MAX20411BAFHB/VY+T equivalent, key selection criteria include I²C-programmable output voltage (6.25mV steps), differential remote sensing, integrated BIST diagnostics, PEC-enabled I²C interface, and AEC-Q100 Grade 1 qualification for under-hood automotive environments.
Technical Context
The MAX20411BAFHB/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−), programmable overvoltage/undervoltage protection (±1% accuracy), and redundant internal reference ensure robust regulation under dynamic load conditions typical of automotive SoC cores. RESET output and BIST diagnostics support functional safety requirements per ISO 26262 ASIL D.
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 post-regulation use cases. |
| Output Voltage Range | 0.5V to 1.275V in 6.25mV steps - enables precise I²C-adjusted core voltage tuning for performance/power trade-offs. |
| Voltage Accuracy | ±0.75% over line, load, and temperature - ensures stable operation across -40°C to +125°C ambient. |
| Switching Frequency | 2.1MHz (default) or 1.05MHz - allows all-ceramic output filtering and layout optimization for EMI-sensitive ADAS modules. |
| Safety Certification | ASIL D compliant with BIST, PEC on I²C, redundant reference - meets ISO 26262 hardware-level safety goals. |
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 sequencing and power-state management in multi-rail systems. |
| RESET | Open-drain fault indicator | Signals output undervoltage, overtemperature, or short-circuit events to system 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 voltage scaling with packet error checking (PEC) for functional safety integrity. |
| LX | Switch node | Connects to external inductor; requires low-inductance routing to minimize switching losses and EMI. |
| BST | Bootstrap supply | Charges high-side gate driver via external 0.1µF capacitor; critical for MOSFET gate drive strength. |
| PGND, GND, AV | Power ground, analog ground, analog supply | Separate ground returns and dedicated analog supply reduce noise coupling into feedback path. |
Key Features
| Feature | Design Value |
|---|---|
| MAXQ® Power Architecture | Enables hybrid load-line + integrator compensation for optimal transient response without external loop components. |
| Programmable Soft-Start | Configurable via I²C to prevent inrush current during power-up in multi-phase or cascaded regulator systems. |
| Spread-Spectrum Modulation | Reduces peak radiated emissions by spreading energy across 2.1MHz ±10% band-critical for CISPR 25 Class 5 compliance. |
| Overtemperature Protection | Thermal shutdown with hysteresis prevents damage during sustained overload or poor heatsinking in compact enclosures. |
| Short-Circuit Protection | Current-limit foldback with auto-recovery avoids latch-up during transient faults in automotive wiring harnesses. |
Applications
| Automotive ADAS Camera Module | Automotive Radar SoC Core Supply |
|---|---|
Use Scenario: Powering image signal processor (ISP) and AI accelerator cores in front-facing camera ECU with strict EMI limits. IC Role / Device Role / Timing Role: Primary point-of-load regulator delivering dynamically scaled 0.75V–1.1V core voltage under I²C control. Use Value: 2.1MHz operation enables compact 10µF ceramic output capacitance; spread-spectrum reduces conducted emissions below CISPR 25 limits. | Use Scenario: Supplying 22A peak current to millimeter-wave radar SoC during chirp bursts with rapid load transients. IC Role / Device Role / Timing Role: High-current buck converter with differential remote sensing to maintain regulation despite PCB trace resistance. Use Value: ±0.75% accuracy and MAXQ architecture ensure <50mV undershoot during 10A/µs load steps-preserving SoC timing margins. |
| Central Domain Controller Core Rail | In-Vehicle Infotainment (IVI) Application Processor |
Use Scenario: Providing stable 0.85V core rail to multi-core ARM-based domain controller operating in engine bay environment. IC Role / Device Role / Timing Role: ASIL D-compliant power stage with BIST and PEC-I²C supporting functional safety monitoring. Use Value: Redundant reference and BIST diagnostics enable periodic self-test without external test equipment-reducing validation overhead. | Use Scenario: Delivering scalable core voltage to quad-core application processor in head-unit with thermal constraints. IC Role / Device Role / Timing Role: Programmable soft-start and slew-rate controlled I²C voltage adjustment coordinate with OS power management. Use Value: I²C-controlled 6.25mV steps allow fine-grained DVFS to balance performance vs. junction temperature in sealed enclosures. |
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 |
|---|---|---|---|
| MPQ4332GLED-AEC1-P | 18A peak, 2.2MHz, no I²C interface, no BIST or PEC, ±1.0% accuracy | Lacks functional safety features and dynamic voltage control; suitable for non-ASIL subsystems | Choose when cost sensitivity outweighs ASIL D requirements and voltage scaling is static. |
| TPS65942412RGERQ1 | Quad-channel PMIC with 2×12A bucks, I²C, ASIL B rated, no spread-spectrum, larger 7mm × 7mm QFN | Integrated multi-rail solution but lower per-channel current and less stringent safety rating | Prefer when consolidating multiple rails is prioritized over single-rail peak current and ASIL D compliance. |
Compared with MPQ4332GLED-AEC1-P and TPS65942412RGERQ1, the MAX20411BAFHB/VY+T uniquely delivers 22A peak current with ASIL D certification, spread-spectrum EMI reduction, and I²C-programmable voltage in a compact 3.5mm × 5mm package-making it optimal for safety-critical, space-constrained SoC core supplies.
Availability
MAX20411BAFHB/VY+T is available at Aetrix Electronics and suitable for automotive ADAS camera modules, radar SoC core supplies, and central domain controller power rails requiring stable component supply, long-term lifecycle support, and AEC-Q100 Grade 1 reliability.
Supply support for MAX20411BAFHB/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 precision, reliability, and functional safety focus.
The MAX20411 family targets automotive power delivery for advanced driver-assistance systems and autonomous driving platforms, emphasizing ASIL D compliance, low EMI, and dynamic voltage scalability for next-generation SoCs.
FAQ
What is the maximum output current capability of the MAX20411BAFHB/VY+T?
The MAX20411BAFHB/VY+T is rated for 22A peak output current. This value reflects its position within the MAX20411 family as the 'B' variant, validated under AEC-Q100 Grade 1 conditions (-40°C to +125°C). Continuous current depends on thermal design, PCB layout, and ambient conditions-but the device sustains 22A peak during transient loads typical of automotive SoC burst operations. The MAX20411BAFHB/VY+T achieves this using integrated low-RDS(ON) switches and optimized thermal pad design in its 3.5mm × 5mm FCQFN package.
Does the MAX20411BAFHB/VY+T support dynamic voltage scaling via I²C?
Yes, the MAX20411BAFHB/VY+T supports full dynamic voltage scaling over its 0.5V–1.275V range in precise 6.25mV steps via its I²C interface. It also includes programmable slew rate control to manage dV/dt during transitions, preventing excessive inrush or instability. Packet Error Checking (PEC) is enabled on the I²C bus to meet functional safety requirements. This capability is integral to the MAX20411BAFHB/VY+T's role in adaptive power management for automotive SoCs.
Is the MAX20411BAFHB/VY+T qualified for automotive applications?
Yes, the MAX20411BAFHB/VY+T is AEC-Q100 Grade 1 qualified (-40°C to +125°C) and ISO 26262 ASIL D compliant. It incorporates redundant internal voltage references, built-in self-test (BIST) diagnostics, and PEC-enabled I²C communication-all verified for automotive safety-critical power delivery. These features are explicitly documented in the official MAX20411 datasheet and supported by Analog Devices' automotive qualification reports. The MAX20411BAFHB/VY+T is designed for deployment in ADAS, radar, and domain controller applications.
What package type and pin count does the MAX20411BAFHB/VY+T use?
The MAX20411BAFHB/VY+T uses a 3.5mm × 5mm, 21-pin side-wettable FCQFN (Fine Pitch Chip-scale Quad Flat No-lead) package with exposed thermal pad. This package supports automated optical inspection (AOI) and improves solder joint reliability under thermal cycling-key for automotive under-hood environments. Pin functions include EN, RESET, RS+/RS−, SDA/SCL, LX, BST, and segregated ground/supply terminals. The MAX20411BAFHB/VY+T's pinout is fully defined in the Analog Devices MAX20411 datasheet Rev 15.
How does the MAX20411BAFHB/VY+T achieve low electromagnetic interference?
The MAX20411BAFHB/VY+T reduces radiated EMI through integrated spread-spectrum frequency modulation (SSFM), which dithers the 2.1MHz switching frequency across ±10% bandwidth. Combined with current-mode control, low-noise layout guidance (e.g., tight PV/PGND loops), and all-ceramic output filtering, it meets CISPR 25 Class 5 limits. Differential remote sensing further minimizes noise-induced regulation errors. These EMI mitigation techniques are inherent to the MAX20411BAFHB/VY+T's architecture-not optional add-ons-and are validated in automotive EMC test reports.
MAX20411BAFHB/VY+T 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:
- 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)
MAX20411BAFHB/VY+T FAQ
1.How can I place an order for MAX20411BAFHB/VY+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20411BAFHB/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 MAX20411BAFHB/VY+T reliable?
The price and inventory of MAX20411BAFHB/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 MAX20411BAFHB/VY+T is usually 5 days.
3.What payment methods are accepted for MAX20411BAFHB/VY+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20411BAFHB/VY+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20411BAFHB/VY+T?
MAX20411BAFHB/VY+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20411BAFHB/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 MAX20411BAFHB/VY+T?
For technical support, including MAX20411BAFHB/VY+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20411BAFHB/VY+T requirements.
6.How does Aetrix verify that MAX20411BAFHB/VY+T is sourced from the original manufacturer or authorized distributors?
All MAX20411BAFHB/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 MAX20411BAFHB/VY+T meets industry standards.
7.What is the process for return or replacement of MAX20411BAFHB/VY+T?
All MAX20411BAFHB/VY+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX20411BAFHB/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 MAX20411BAFHB/VY+T part is unused and in its original packaging.
Return procedure for MAX20411BAFHB/VY+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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