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Analog Devices Inc./Maxim Integrated MAX20411BAFHB/VY+
- Part No.:
- MAX20411BAFHB/VY+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 21-PowerWFQFN
- Datasheet:
-
MAX20411BAFHB/VY+.pdf
- Description:
- IC REG BUCK PROG 22A 21FC2QFN
- Quantity:
- Payment:
- Shipping:
Inventory:420
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Product details
Overview
MAX20411BAFHB/VY+ from Analog Devices is a high-efficiency, AEC-Q100 Grade 1 synchronous step-down converter for automotive ADAS and SoC core power, delivering up to 22A peak output current with ±0.75% output voltage accuracy over load, line, and temperature, operating from 3.0V–5.5V input and supporting 0.5V–1.275V I²C-programmable output in 6.25mV steps.
For engineers reviewing the MAX20411BAFHB/VY+ datasheet, MAX20411BAFHB/VY+ pinout, MAX20411BAFHB/VY+ application, or MAX20411BAFHB/VY+ equivalent, key selection considerations include ASIL D compliance, 2.1MHz fixed-frequency PWM operation with spread-spectrum modulation, differential remote sensing, programmable soft-start, and integrated BIST diagnostics for functional safety-critical power rails.
Technical Context
The MAX20411BAFHB/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) and includes redundant internal reference plus PEC-protected I²C interface for robust digital control.
Differential remote voltage sensing (RS+/RS−), programmable OV/UV thresholds (±1% accuracy), and integrated overtemperature/short-circuit protection enable reliable operation in harsh automotive environments. The device meets ASIL D requirements per ISO 26262 and includes built-in self-test (BIST) for safety mechanism validation.
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 stages. |
| 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 minimizes EMI-sensitive layout area. |
| Voltage Accuracy | ±0.75% over load, line, and temperature - ensures stable core voltage under full thermal and load transients. |
| Safety Certification | ASIL D compliant with BIST, PEC, and redundant reference - satisfies ISO 26262 hardware-level safety goals. |
| Package | 3.5mm × 5mm, 21-pin side-wettable FCQFN - supports automated optical inspection (AOI) and high-reliability solder joint formation. |
Pinout & Package
MAX20411BAFHB/VY+ is housed in a 3.5mm × 5mm, 21-pin side-wettable FCQFN package optimized for automotive thermal and reliability requirements. Pin numbering follows standard FCQFN convention with exposed thermal pad (EP) on underside.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN | Enable input | Active-high logic control for power sequencing; supports controlled startup and system-level sleep/wake coordination. |
| RESET | Power-good output | Open-drain signal indicating valid VOUT within regulation window; used for processor reset synchronization. |
| RS+, RS− | Differential remote sense inputs | Compensates for PCB IR drop to maintain ±0.75% accuracy at point-of-load under dynamic current conditions. |
| SDA, SCL | I²C bidirectional data/clock | PEC-enabled interface for dynamic voltage adjustment, fault reporting, and configuration readback. |
| LX | Switch node | Connects to external inductor; requires low-inductance layout to minimize switching losses and EMI. |
| PGND, GND, AV | Power ground / analog ground | Separate ground domains isolate noisy switch-node return from precision feedback and I²C circuitry. |
| BST | Bootstrap supply | Charges high-side gate driver; requires 0.1µF ceramic capacitor between BST and LX for reliable FET drive. |
Key Features
| Feature | Design Value |
|---|---|
| MAXQ® Power Architecture | Hybrid compensation (load-line + integrator) enables optimal transient response without external tuning components. |
| Spread-spectrum modulation | Reduces peak radiated emissions by spreading energy across 2.1MHz ±10% bandwidth, easing EMC certification. |
| Programmable soft-start | Configurable ramp time prevents inrush current and stabilizes upstream supplies during power-up. |
| Differential remote sensing | Maintains tight output regulation at SoC die despite >100mV PCB voltage drop under 22A load steps. |
| Integrated BIST and PEC | Validates internal reference, ADC, and I²C integrity at startup and runtime-required for ASIL D diagnostic coverage. |
Applications
| Automotive ADAS Camera Module | Automotive Radar SoC Core Supply |
|---|---|
Use Scenario: Dual-camera fusion system requiring independent, dynamically scaled core voltages for image signal processors and neural network accelerators. IC Role / Device Role / Timing Role: Primary point-of-load regulator delivering 22A peak at 0.85V with <10µs load-step response and I²C-controlled DVFS. Use Value: Enables real-time voltage scaling to match computational workload while maintaining ASIL D-compliant fault detection and reporting. | Use Scenario: 77GHz radar SoC demanding ultra-stable 0.9V core rail with minimal noise coupling into RF front-end. IC Role / Device Role / Timing Role: High-PSRR, low-noise buck converter with differential remote sensing and 2.1MHz spread-spectrum operation. Use Value: Achieves <1mVpp output ripple and eliminates need for additional LDO post-regulation, reducing BOM count and thermal load. |
| Automotive Central Domain Controller | Automotive Infotainment Application Processor |
Use Scenario: Multi-core domain controller powering CPU, GPU, and memory subsystems with coordinated voltage sequencing. IC Role / Device Role / Timing Role: Programmable EN/RESET timing and I²C-configurable soft-start support synchronized power-up of heterogeneous compute clusters. Use Value: Eliminates external sequencer ICs and reduces firmware complexity for boot-time rail coordination. | Use Scenario: High-resolution display and voice assistant SoC requiring fast transient response during burst-mode video decoding. IC Role / Device Role / Timing Role: 22A capable buck with <5µs recovery from 80% load step, supported by MAXQ® architecture and ceramic-only output filter. Use Value: Prevents display flicker and audio artifacts during sudden computational load changes without adding bulk capacitance. |
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 |
|---|---|---|---|
| MPQ4332GQB-AEC1-Z | 18A peak, 2.2MHz fixed frequency, no I²C interface or BIST; ±1.0% voltage accuracy. | Lacks ASIL D compliance, remote sensing, and programmable DVFS-suitable for non-safety-critical infotainment rails only. | Select when cost sensitivity outweighs functional safety and dynamic voltage control needs. |
| TPS62480QRVCTQ1 | 20A peak, 2.4MHz, I²C interface but no spread-spectrum or BIST; ±0.9% accuracy; QFN-26 package. | Supports basic DVFS but lacks ASIL D features and differential sensing-requires external monitoring for safety-critical use. | Choose for simpler I²C-controlled designs where full ISO 26262 hardware-level diagnostics are not mandated. |
Compared with MPQ4332GQB-AEC1-Z and TPS62480QRVCTQ1, the MAX20411BAFHB/VY+ uniquely integrates ASIL D–compliant BIST, differential remote sensing, and MAXQ® transient optimization-enabling single-chip compliance for demanding ADAS core power without external safety monitors or compensation networks.
Availability
MAX20411BAFHB/VY+ is available at Aetrix Electronics and suitable for automotive ADAS camera modules, radar SoC core power, and central domain controller applications requiring stable component supply, long-term lifecycle assurance, and AEC-Q100 Grade 1 reliability.
Supply support for MAX20411BAFHB/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 functional safety power delivery, specifically engineered to replace multi-chip discrete buck + monitor + sequencer solutions in ASIL D–rated ADAS and domain controller systems.
FAQ
What is the maximum output current capability of the MAX20411BAFHB/VY+?
The MAX20411BAFHB/VY+ delivers up to 22A peak output current, validated across its full operating temperature range (−40°C to +125°C) and input voltage range (3.0V to 5.5V). This rating reflects continuous conduction mode performance with appropriate thermal design and layout-no current derating is required for automotive Grade 1 ambient conditions when using the recommended 3.5mm × 5mm FCQFN footprint and PCB copper pour.
Does the MAX20411BAFHB/VY+ support dynamic voltage scaling via I²C?
Yes, the MAX20411BAFHB/VY+ supports full dynamic voltage scaling over its 0.5V–1.275V output range in precise 6.25mV steps via its PEC-protected I²C interface. Slew rate is programmable to prevent overshoot during transitions, and voltage change status is reported back through dedicated I²C registers-enabling closed-loop coordination with host processors in automotive SoCs.
Is the MAX20411BAFHB/VY+ qualified for automotive safety applications?
Yes, the MAX20411BAFHB/VY+ is AEC-Q100 Grade 1 qualified and fully ASIL D compliant per ISO 26262. It integrates redundant internal reference, built-in self-test (BIST) for critical analog blocks, and packet error checking (PEC) on I²C-providing hardware-level diagnostic coverage required for safety-critical power rails in ADAS and autonomous driving systems.
What package type and pin count does the MAX20411BAFHB/VY+ use?
The MAX20411BAFHB/VY+ uses a 3.5mm × 5mm, 21-pin side-wettable FCQFN package with exposed thermal pad. This package enables automated optical inspection (AOI) of solder joints and improves thermal resistance versus standard QFN-critical for sustained 22A operation in compact automotive ECUs. Pinout matches the full MAX20411 family, ensuring layout reuse across current variants.
How does the MAX20411BAFHB/VY+ achieve low electromagnetic emissions?
The MAX20411BAFHB/VY+ reduces radiated EMI through integrated spread-spectrum frequency modulation (SSFM) across its 2.1MHz switching frequency ±10%, combined with low-noise current-mode PWM control and optimized internal gate drivers. Layout guidelines emphasize short, symmetric LX routing and separate PGND/AV ground planes-enabling compliance with CISPR 25 Class 5 without added shielding or ferrites in typical ADAS module implementations.
MAX20411BAFHB/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:
- 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+ FAQ
1.How can I place an order for MAX20411BAFHB/VY+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20411BAFHB/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 MAX20411BAFHB/VY+ reliable?
The price and inventory of MAX20411BAFHB/VY+ 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+ is usually 5 days.
3.What payment methods are accepted for MAX20411BAFHB/VY+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20411BAFHB/VY+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20411BAFHB/VY+?
MAX20411BAFHB/VY+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20411BAFHB/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 MAX20411BAFHB/VY+?
For technical support, including MAX20411BAFHB/VY+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20411BAFHB/VY+ requirements.
6.How does Aetrix verify that MAX20411BAFHB/VY+ is sourced from the original manufacturer or authorized distributors?
All MAX20411BAFHB/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 MAX20411BAFHB/VY+ meets industry standards.
7.What is the process for return or replacement of MAX20411BAFHB/VY+?
All MAX20411BAFHB/VY+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20411BAFHB/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 MAX20411BAFHB/VY+ part is unused and in its original packaging.
Return procedure for MAX20411BAFHB/VY+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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