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Analog Devices Inc./Maxim Integrated MAX20411BAFHD/VY+
- Part No.:
- MAX20411BAFHD/VY+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 21-PowerWFQFN
- Datasheet:
-
MAX20411BAFHD/VY+.pdf
- Description:
- IC REG BUCK PROG 22A 21FC2QFN
- Quantity:
- Payment:
- Shipping:
Inventory:420
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Product details
Overview
MAX20411BAFHD/VY+ from Analog Devices is a high-efficiency, AEC-Q100 Grade 1 synchronous step-down converter delivering up to 22A peak output current, operating from 3.0V–5.5V input and regulating 0.5V–1.275V output with ±0.75% accuracy, used in automotive ADAS SoC core power supplies.
For engineers reviewing the MAX20411BAFHD/VY+ datasheet, MAX20411BAFHD/VY+ pinout, MAX20411BAFHD/VY+ application, or MAX20411BAFHD/VY+ equivalent, key selection criteria include ASIL D compliance, I²C-controlled dynamic voltage scaling (6.25mV steps), 2.1MHz fixed-frequency PWM operation, differential remote sensing, and integrated BIST diagnostics for functional safety-critical designs.
Technical Context
The MAX20411BAFHD/VY+ 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 2.1MHz or 1.05MHz switching via SYNC pin configuration.
Differential remote sensing (RS+, RS−) enables accurate load regulation under PCB IR drop; integrated PEC on I²C ensures data integrity during dynamic voltage adjustment; redundant reference and BIST diagnostics support ASIL D system-level fault detection requirements.
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 fine-grained I²C-programmable VDD scaling for power-performance tuning. |
| Voltage Accuracy | ±0.75% over line, load, temperature - ensures stable SoC operation across -40°C to +125°C. |
| Switching Frequency | 2.1MHz (default) or 1.05MHz - allows all-ceramic output filtering and minimizes EMI-sensitive layout area. |
| Safety Certification | ASIL D compliant with BIST, redundant reference, and PEC-enabled I²C - meets ISO 26262 hardware-level requirements. |
Pinout & Package
MAX20411BAFHD/VY+ is housed in a 3.5mm × 5mm, 21-pin side-wettable FCQFN package optimized for automotive thermal and solder-joint reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN | Enable input | Active-high logic control for full device power-up/shutdown sequencing. |
| RESET | Open-drain reset output | Indicates valid output regulation; asserts low during UV/OV/fault conditions. |
| SDA / SCL | I²C bidirectional data/clock | Supports dynamic VOUT adjustment, telemetry readback, and fault logging with packet error checking (PEC). |
| RS+ / RS− | Differential remote sense inputs | Compensates for PCB trace resistance to maintain ±0.75% regulation at point-of-load. |
| LX | Switch node | Connects to external inductor; requires low-inductance layout for EMI and efficiency optimization. |
| BST | Bootstrap supply | Charges high-side gate driver; requires 0.1µF ceramic capacitor between BST and LX. |
| PGND / GND | Power / analog ground | Separate ground pins minimize noise coupling between power switching and I²C/sensing circuits. |
Key Features
| Feature | Design Value |
|---|---|
| MAXQ® Power Architecture | Enables hybrid load-line + integrator compensation for optimal transient response without external loop components. |
| Spread-spectrum frequency modulation | Reduces peak radiated EMI by spreading energy across 2.1MHz ±12.5kHz band-no added filter components required. |
| Programmable soft-start | Configurable via I²C to prevent inrush current during power-up of sensitive SoC cores. |
| Overtemperature & short-circuit protection | Thermal shutdown at 150°C with auto-recovery; cycle-by-cycle current limiting prevents damage during output faults. |
| Factory-preset output voltage | MAX20411BAFHD/VY+ is shipped with VOUT preset to 1.0V (±0.75%), reducing startup configuration overhead. |
Applications
| Automotive ADAS Camera Module Power | Automotive Radar SoC Core Supply |
|---|---|
Use Scenario: Powers image signal processor (ISP) and MIPI interface in 8MP surround-view camera modules requiring tight voltage tolerance and fast load transients. IC Role / Device Role / Timing Role: Primary point-of-load regulator delivering 1.0V @ 18A with ±0.75% accuracy and <5µs recovery from 80% load step. Use Value: Differential remote sensing maintains regulation accuracy despite 50mΩ PCB trace resistance; ASIL D diagnostics enable safe failover in vision-critical systems. | Use Scenario: Supplies 1.1V core rail to 77GHz radar SoC with burst-mode processing demands and strict EMI limits in front-bumper placement. IC Role / Device Role / Timing Role: High-current buck converter with 2.1MHz spread-spectrum switching and forced-PWM mode for consistent timing under variable load. Use Value: All-ceramic output filter enabled by 2.1MHz operation reduces board area by 40% vs. lower-frequency alternatives; BIST validates internal reference pre-boot. |
| Infotainment Application Processor Core | Automotive Domain Controller VDD_MAIN |
Use Scenario: Regulates core voltage for quad-core ARM-based infotainment SoC with dynamic DVFS requiring real-time I²C voltage updates. IC Role / Device Role / Timing Role: I²C-programmable buck converter supporting 6.25mV VOUT steps and programmable slew rate (0.5–10mV/µs) for controlled power-state transitions. Use Value: Enables precise SoC performance scaling while maintaining ±0.75% regulation across temperature; PEC-protected I²C prevents command corruption in noisy vehicle environments. | Use Scenario: Delivers 1.2V @ 20A to central domain controller managing ADAS, infotainment, and body electronics. IC Role / Device Role / Timing Role: High-reliability post-regulator with redundant voltage reference and RESET assertion on OV/UV faults for system-level watchdog coordination. Use Value: Redundant reference improves long-term stability beyond AEC-Q100 lifetime requirements; RESET output synchronizes firmware-initiated safe state entry. |
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 |
|---|---|---|---|
| TPS659424RHBR | 4-channel PMIC with dual 20A bucks; no spread-spectrum; 1.2MHz max switching frequency. | Targets multi-rail SoC power with integrated LDOs; less suitable for single-rail 22A optimization. | Select when needing integrated multi-rail sequencing and LDOs-not for standalone high-efficiency 22A conversion. |
| MPQ4436AGL-AEC1 | Single 25A buck; 2.2MHz fixed frequency; no I²C, no ASIL D features, no BIST or PEC. | Cost-optimized automotive buck without functional safety or dynamic voltage control. | Select only for non-ASIL applications where I²C control and diagnostics are unnecessary. |
Compared with TPS659424RHBR and MPQ4436AGL-AEC1, the MAX20411BAFHD/VY+ uniquely combines 22A capability, ASIL D compliance, I²C-programmable VOUT with PEC, and spread-spectrum EMI reduction-making it the only option for safety-critical, dynamically scaled, single-rail automotive core supplies.
Availability
MAX20411BAFHD/VY+ is available at Aetrix Electronics and suitable for automotive ADAS camera modules, radar SoC core supplies, and domain controller VDD_MAIN rails requiring stable component supply, AEC-Q100 qualification, and ASIL D functional safety support.
Supply support for MAX20411BAFHD/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 precision, reliability, and safety-certified solutions.
The MAX20411 family targets automotive functional safety-critical power delivery, specifically engineered to meet ASIL D requirements for next-generation ADAS and zonal architecture domain controllers.
FAQ
What output voltage is factory-preset on the MAX20411BAFHD/VY+?
The MAX20411BAFHD/VY+ is factory-preset to 1.0V ±0.75%, matching common SoC core voltage requirements. This setting can be adjusted dynamically via I²C commands in 6.25mV increments across the full 0.5V–1.275V range. The preset eliminates boot-time configuration delays while retaining flexibility for DVFS use cases. MAX20411BAFHD/VY+ retains its ±0.75% accuracy specification across temperature and load after reprogramming.
Does the MAX20411BAFHD/VY+ support spread-spectrum frequency modulation?
Yes, the MAX20411BAFHD/VY+ includes optional spread-spectrum frequency modulation that dithers the 2.1MHz switching frequency by ±12.5kHz to reduce peak radiated EMI. This feature is enabled via I²C register bit and requires no external components. It is particularly effective in automotive front-end modules where EMI must meet CISPR 25 Class 5 limits. MAX20411BAFHD/VY+ maintains full load-transient performance and efficiency with spread-spectrum active.
How does the MAX20411BAFHD/VY+ implement ASIL D compliance?
The MAX20411BAFHD/VY+ achieves ASIL D compliance through redundant internal voltage references, built-in self-test (BIST) for analog blocks, packet error checking (PEC) on I²C transactions, and independent overvoltage/undervoltage comparators with ±1% accuracy. These features are documented in the device's FMEDA report and certified per ISO 26262. MAX20411BAFHD/VY+ provides diagnostic coverage metrics required for ASIL D decomposition in system-level safety architectures.
What is the purpose of the RS+ and RS− pins on the MAX20411BAFHD/VY+?
The RS+ and RS− pins on the MAX20411BAFHD/VY+ provide differential remote voltage sensing to compensate for IR drop across PCB traces between the regulator output and the load. This ensures ±0.75% output regulation accuracy is maintained at the point-of-load-even with up to 50mΩ total trace resistance. MAX20411BAFHD/VY+ uses these inputs to adjust feedback internally, eliminating need for external Kelvin connections or compensation networks.
Can the MAX20411BAFHD/VY+ operate at 1.05MHz, and how is frequency selected?
Yes, the MAX20411BAFHD/VY+ supports dual switching frequencies: default 2.1MHz or 1.05MHz, selected by pulling the SYNC pin low (1.05MHz) or leaving it floating/high (2.1MHz). Lower frequency enables use of higher-value inductors and reduces switching losses at light loads, while 2.1MHz allows smaller magnetics and all-ceramic output filtering. MAX20411BAFHD/VY+ maintains identical regulation accuracy and protection behavior across both modes.
MAX20411BAFHD/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)
MAX20411BAFHD/VY+ FAQ
1.How can I place an order for MAX20411BAFHD/VY+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20411BAFHD/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 MAX20411BAFHD/VY+ reliable?
The price and inventory of MAX20411BAFHD/VY+ 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+ is usually 5 days.
3.What payment methods are accepted for MAX20411BAFHD/VY+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20411BAFHD/VY+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20411BAFHD/VY+?
MAX20411BAFHD/VY+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20411BAFHD/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 MAX20411BAFHD/VY+?
For technical support, including MAX20411BAFHD/VY+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20411BAFHD/VY+ requirements.
6.How does Aetrix verify that MAX20411BAFHD/VY+ is sourced from the original manufacturer or authorized distributors?
All MAX20411BAFHD/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 MAX20411BAFHD/VY+ meets industry standards.
7.What is the process for return or replacement of MAX20411BAFHD/VY+?
All MAX20411BAFHD/VY+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20411BAFHD/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 MAX20411BAFHD/VY+ part is unused and in its original packaging.
Return procedure for MAX20411BAFHD/VY+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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