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Analog Devices Inc./Maxim Integrated MAX20411EAFHA/VY+
- Part No.:
- MAX20411EAFHA/VY+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 21-PowerWFQFN
- Datasheet:
-
MAX20411EAFHA/VY+.pdf
- Description:
- IC REG BUCK PROG 21FC2QFN
- Quantity:
- Payment:
- Shipping:
Inventory:420
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Product details
Overview
MAX20411EAFHA/VY+ 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 MAX20411EAFHA/VY+ datasheet, MAX20411EAFHA/VY+ pinout, MAX20411EAFHA/VY+ application, or MAX20411EAFHA/VY+ equivalent, key selection considerations include AEC-Q100 Grade 1 qualification (-40°C to +125°C), side-wettable 21-pin FCQFN (3.5mm × 5mm), differential remote sensing, RESET output, and programmable OV/UV protection with ±1% accuracy.
Technical Context
The MAX20411EAFHA/VY+ implements current-mode, forced-PWM control with MAXQ® power architecture-combining hybrid load-line and integrator-based compensation for precision transient response and phase margin optimization. It supports dual switching frequencies (2.1MHz or 1.05MHz) and integrates low RDS(ON) MOSFETs to minimize conduction loss and simplify PCB layout.
Differential remote voltage sensing (RS+/RS−), PEC-enabled I²C interface with programmable slew rate, and built-in BIST diagnostics with redundant reference support functional safety requirements for ASIL D systems. The device includes overtemperature, short-circuit, and programmable overvoltage/undervoltage protections with ±1% threshold accuracy.
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 automotive 3.3V/5V supply rails and post-regulation from higher-voltage domains. |
| Output Voltage Range | 0.5V to 1.275V in 6.25mV steps - supports precise core voltage scaling for AI accelerators and vision processors. |
| Output Accuracy | ±0.75% over line/load/temp - ensures stable operation across full automotive temperature range without external calibration. |
| Switching Frequency | 2.1MHz (default) or 1.05MHz - allows all-ceramic output filtering and reduces EMI while maintaining transient response. |
| Safety Certification | ASIL D compliant with BIST, redundant reference, and PEC on I²C - meets ISO 26262 hardware requirements for safety-critical ADAS power rails. |
| Package | 3.5mm × 5mm, 21-pin side-wettable FCQFN - supports automated optical inspection (AOI) and improves solder joint reliability in automotive reflow profiles. |
Pinout & Package
MAX20411EAFHA/VY+ uses a 3.5mm × 5mm, 21-pin side-wettable FCQFN package with exposed thermal pad (EP). Pin 1 marked via top-side silkscreen dot; pins arranged in two rows (10+11), with GND, PGND, and AV pins distributed for optimal noise isolation and thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN | Enable input | Active-high logic input controlling startup/shutdown; internal pull-down ensures default off-state at power-up. |
| RESET | Power-good indicator | Open-drain output asserting low during VOUT fault or startup delay; synchronized to internal power sequencing. |
| RS+, RS− | Differential remote sense inputs | Measure load voltage directly at point-of-load to compensate for IR drop in PCB traces and connectors. |
| SDA, SCL | I²C bidirectional data/clock | Support dynamic voltage scaling with PEC error checking; slew rate programmable to reduce EMI during transitions. |
| BST | Bootstrap supply for high-side FET gate drive | Requires 0.1µF ceramic capacitor to SW node; enables efficient 100% duty-cycle operation during low-VOUT regulation. |
| LX | Switch node | Connects to external inductor; high di/dt node requiring tight loop area and ground plane stitching to minimize EMI. |
| PGND, GND, AV | Power/ground/analog return paths | Separate PGND (power switch return), GND (digital logic return), and AV (analog reference return) minimize noise coupling between domains. |
Key Features
| Feature | Design Value |
|---|---|
| MAXQ® Power Architecture | Hybrid compensation combining load-line and integrator paths - delivers >60° phase margin and <10µs recovery from 80% load step without external tuning. |
| Spread-spectrum frequency modulation | Reduces peak radiated emissions by up to 10dB - eliminates need for additional EMI filters in compact ADAS camera modules. |
| Programmable soft-start | Configurable 0.5ms–20ms ramp time via I²C - prevents inrush current damage to downstream capacitors and avoids brownout on shared input rails. |
| Overvoltage/Undervoltage protection | ±1% threshold accuracy with independent enable/disable per rail - enables selective shutdown of faulty power domains without affecting system-wide operation. |
| Side-wettable FCQFN | Exposed thermal pad with side-wall solder fillet visibility - enables 100% AOI coverage for automotive zero-defect manufacturing requirements. |
Applications
| ADAS Camera Module Power | Automotive Radar SoC Core Supply |
|---|---|
Use Scenario: Powers 5nm vision SoC in front-facing ADAS camera with real-time image processing and neural network inference. IC Role / Device Role / Timing Role: Primary core regulator delivering dynamically scaled 0.75V–1.1V at up to 35A peak, synchronized to sensor frame timing via SYNC pin. Use Value: ±0.75% output accuracy and differential remote sensing maintain SoC timing margins under varying ambient temperature and trace resistance. | Use Scenario: Supplies mmWave radar processor requiring fast load transients during chirp sequence execution and low-noise operation. IC Role / Device Role / Timing Role: High-bandwidth point-of-load regulator with 2.1MHz PWM and spread-spectrum modulation to suppress switching noise near RF receive bands. Use Value: Excellent load-transient response (<10µs recovery) and integrated BIST ensure functional safety compliance during radar self-test cycles. |
| Central Domain Controller Core Rail | In-Cabin Driver Monitoring System |
Use Scenario: Provides main CPU core voltage for zonal architecture domain controller managing multiple vehicle subsystems. IC Role / Device Role / Timing Role: ASIL D-compliant power stage with redundant reference and PEC-secured I²C enabling safe dynamic voltage/frequency scaling (DVFS). Use Value: Dual-frequency operation (1.05MHz/2.1MHz) allows trade-off between efficiency and transient performance based on real-time workload demands. | Use Scenario: Powers eye-tracking SoC in driver monitoring system requiring ultra-low EMI to avoid interference with near-infrared illumination. IC Role / Device Role / Timing Role: Low-noise, spread-spectrum enabled regulator with all-ceramic output filter supporting quiet analog front-end operation. Use Value: Side-wettable FCQFN package ensures solder joint reliability across thermal cycling in cabin environments (−40°C to +85°C). |
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 |
|---|---|---|---|
| MPQ4436-AEC1 (Monolithic Power Systems) | 30A peak, 2.2MHz fixed frequency, no I²C interface, no ASIL D certification | Lacks dynamic voltage scaling and functional safety features; suitable for non-safety-critical infotainment rails | Select when cost sensitivity outweighs safety compliance and programmability needs |
| TPS659413 (Texas Instruments) | Multi-rail PMIC with 12A buck + LDOs; I²C interface; ASIL B rated; smaller 3.0mm × 4.0mm QFN | Integrated multi-output solution but lower per-rail current; requires external components for 40A capability | Select when consolidating multiple rails is prioritized over single-rail peak current density |
Compared with MPQ4436-AEC1 and TPS659413, the MAX20411EAFHA/VY+ uniquely delivers 40A peak current with ASIL D compliance, I²C-programmable voltage scaling, and side-wettable packaging-making it the only option for safety-critical, high-power ADAS SoC core supplies where board space, thermal reliability, and functional safety are co-constrained.
Availability
MAX20411EAFHA/VY+ is available at Aetrix Electronics and suitable for automotive ADAS camera modules, radar SoC core power, central domain controllers, and driver monitoring systems requiring stable component supply with full AEC-Q100 Grade 1 qualification and long-term production support.
Supply support for MAX20411EAFHA/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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving automotive, industrial, communications, and healthcare markets with precision power, sensing, and connectivity solutions.
The MAX20411 family belongs to Analog Devices' automotive power management portfolio, engineered specifically for ASIL D-compliant, high-current point-of-load regulation in advanced driver-assistance and autonomous driving systems.
FAQ
What is the maximum output current capability of the MAX20411EAFHA/VY+?
The MAX20411EAFHA/VY+ supports up to 40A peak output current, validated across the full −40°C to +125°C automotive temperature range. This rating assumes proper PCB layout with adequate copper area for thermal dissipation and use of recommended external components including low-ESR ceramic output capacitors and a suitable power inductor. Continuous current depends on ambient conditions and layout but typically sustains ≥32A at +85°C ambient.
Does the MAX20411EAFHA/VY+ support dynamic voltage scaling via I²C?
Yes, the MAX20411EAFHA/VY+ supports dynamic voltage scaling through its PEC-enabled I²C interface, allowing real-time adjustment of the output voltage from 0.5V to 1.275V in precise 6.25mV steps. Slew rate is programmable to control transition speed and mitigate system-level noise coupling during voltage changes, making it ideal for DVFS in automotive SoCs.
Is the MAX20411EAFHA/VY+ qualified for automotive applications?
Yes, the MAX20411EAFHA/VY+ is AEC-Q100 Grade 1 qualified (−40°C to +125°C) and fully ASIL D compliant per ISO 26262, with integrated BIST, redundant voltage reference, and PEC-secured I²C. These features are verified in the device's safety manual and supported by FMEDA reports available under NDA from Analog Devices.
What package type does the MAX20411EAFHA/VY+ use, and why is it important for automotive use?
The MAX20411EAFHA/VY+ uses a 3.5mm × 5mm, 21-pin side-wettable FCQFN package. Its side-wettable leads enable automated optical inspection (AOI) of solder fillets-a critical requirement for zero-defect manufacturing in automotive electronics. The exposed thermal pad also enhances thermal performance in constrained chassis environments.
How does the MAX20411EAFHA/VY+ achieve low electromagnetic interference (EMI)?
The MAX20411EAFHA/VY+ reduces EMI through multiple integrated techniques: 2.1MHz fixed-frequency operation enabling small, all-ceramic filters; optional spread-spectrum frequency modulation lowering peak radiated emissions by up to 10dB; and optimized internal gate drivers with controlled slew rates. Layout guidelines in the datasheet further minimize loop inductance to meet CISPR 25 Class 5 requirements.
MAX20411EAFHA/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:
- -
- 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)
MAX20411EAFHA/VY+ FAQ
1.How can I place an order for MAX20411EAFHA/VY+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20411EAFHA/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 MAX20411EAFHA/VY+ reliable?
The price and inventory of MAX20411EAFHA/VY+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20411EAFHA/VY+ is usually 5 days.
3.What payment methods are accepted for MAX20411EAFHA/VY+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20411EAFHA/VY+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20411EAFHA/VY+?
MAX20411EAFHA/VY+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20411EAFHA/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 MAX20411EAFHA/VY+?
For technical support, including MAX20411EAFHA/VY+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20411EAFHA/VY+ requirements.
6.How does Aetrix verify that MAX20411EAFHA/VY+ is sourced from the original manufacturer or authorized distributors?
All MAX20411EAFHA/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 MAX20411EAFHA/VY+ meets industry standards.
7.What is the process for return or replacement of MAX20411EAFHA/VY+?
All MAX20411EAFHA/VY+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20411EAFHA/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 MAX20411EAFHA/VY+ part is unused and in its original packaging.
Return procedure for MAX20411EAFHA/VY+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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