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Analog Devices Inc./Maxim Integrated MAX20411CAFHG/VY+
- Part No.:
- MAX20411CAFHG/VY+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 21-PowerWFQFN
- Datasheet:
-
MAX20411CAFHG/VY+.pdf
- Description:
- IC REG BUCK PROG 30A 21FC2QFN
- Quantity:
- Payment:
- Shipping:
Inventory:420
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Product details
Overview
MAX20411CAFHG/VY+ from Analog Devices is an automotive-grade, synchronous step-down DC-DC converter delivering up to 30A 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 and ASIL D compliance for SoC core power in ADAS systems.
For engineers reviewing the MAX20411CAFHG/VY+ datasheet, MAX20411CAFHG/VY+ pinout, MAX20411CAFHG/VY+ application, or MAX20411CAFHG/VY+ equivalent, key selection criteria include its 30A capability, 2.1MHz fixed-frequency PWM operation, differential remote sensing, AEC-Q100 Grade 1 qualification, and factory-preset 1.2V output with I²C programmability.
Technical Context
The MAX20411CAFHG/VY+ implements current-mode, forced-PWM control with MAXQ® power architecture-enabling hybrid load-line + integrator compensation for precision transient response and phase-margin optimization. It supports 2.1MHz (default) or 1.05MHz switching via SYNC pin configuration.
Differential remote voltage sensing (RS+/RS−), integrated low-RDS(ON) FETs, spread-spectrum frequency modulation, and PEC-enabled I²C interface collectively address EMI, layout simplicity, fault resilience, and dynamic SoC voltage scaling requirements in safety-critical automotive domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 30A peak - supports high-power SoC cores without external current sharing. |
| Input Voltage Range | 3.0V to 5.5V - compatible with automotive 3.3V/5V rails and post-regulation from higher-voltage supplies. |
| Output Voltage Range | 0.5V to 1.275V in 6.25mV steps - enables fine-grained I²C-adjustable core voltage tuning for DVFS. |
| Switching Frequency | 2.1MHz (default) or 1.05MHz - allows all-ceramic output filtering and reduces solution size; selectable via SYNC pin. |
| Output Accuracy | ±0.75% over line, load, and temperature - ensures stable SoC operation across full automotive thermal range. |
| Operating Temperature | −40°C to +125°C (Grade 1) - qualified per AEC-Q100 Rev G for under-hood and ADAS ECU deployment. |
| Safety Certification | ASIL D compliant with BIST diagnostics, redundant reference, and PEC on I²C - meets ISO 26262 functional safety requirements. |
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 power sequencing; internal pull-down ensures default off-state. |
| RESET | Open-Drain Power-Good Output | Asserts low when VOUT is within ±5% of target; used for SoC reset coordination. |
| RS+, RS− | Differential Remote Sense Inputs | Compensates for PCB IR drop between converter and SoC VDD rail, improving regulation accuracy at point-of-load. |
| SDA, SCL | I²C Bidirectional Data/Clock | Supports dynamic voltage scaling with programmable slew rate and packet error checking (PEC). |
| LX | Switch Node | Connects to external inductor; requires low-inductance layout to minimize switching losses and EMI. |
| BST | Bootstrap Supply | Charges high-side gate driver via external 0.1µF capacitor; critical for continuous high-side FET conduction. |
| PGND, GND, AV | Power Ground / Analog Ground / Analog Supply | Separate ground returns isolate noise-sensitive analog circuitry (AV, SDA/SCL) from high-current paths (PGND, LX). |
Key Features
| Feature | Design Value |
|---|---|
| MAXQ® Power Architecture | Enables hybrid load-line + integrator compensation for optimal transient response and stability margin without external components. |
| Spread-Spectrum Modulation | Reduces peak radiated EMI by spreading fundamental switching energy across a 100kHz band, easing EMC certification. |
| Programmable Soft-Start | Configurable via I²C to prevent inrush current during power-up, protecting input capacitors and upstream supplies. |
| Overvoltage/Undervoltage Protection | ±1% accuracy OV/UV detection with latch-off behavior - prevents SoC damage from supply faults. |
| Side-Wettable FCQFN | Enables reliable automated optical inspection (AOI) of solder joints for zero-defect automotive manufacturing. |
Applications
| ADAS Sensor Fusion ECU | Automotive SoC Core Rail |
|---|---|
Use Scenario: Powering multi-core vision SoCs (e.g., NVIDIA DRIVE Orin) in front-camera modules requiring rapid DVFS during object detection bursts. IC Role / Device Role / Timing Role: Primary point-of-load regulator with I²C-controlled voltage scaling synchronized to CPU workload states. Use Value: 30A peak current and ±0.75% accuracy maintain SoC performance within thermal limits while enabling >90% efficiency at 1.2V/20A. | Use Scenario: Regulating core voltage for radar processor SoCs in 77GHz radar ECUs operating continuously at −40°C to +125°C. IC Role / Device Role / Timing Role: Safety-critical power delivery unit with ASIL D compliance, BIST diagnostics, and redundant reference for fault detection. Use Value: AEC-Q100 Grade 1 qualification and side-wettable FCQFN ensure long-term reliability in high-vibration, thermally aggressive environments. |
| Central Domain Controller | Automotive Infotainment SoC |
Use Scenario: Supplying variable core voltage to centralized zonal controllers managing vehicle-wide CAN FD, Ethernet, and sensor data aggregation. IC Role / Device Role / Timing Role: High-current post-regulator with differential remote sensing to compensate for long PCB traces between power stage and SoC pads. Use Value: RS+/RS− inputs reduce effective output error to <±0.5% at SoC pins, preventing timing violations under dynamic load steps. | Use Scenario: Delivering dynamically scaled core power to application processors (e.g., Qualcomm SA8155P) in head-unit systems with real-time UI responsiveness demands. IC Role / Device Role / Timing Role: I²C-programmable buck converter supporting DVFS profiles defined by Linux kernel cpufreq governors. Use Value: 6.25mV I²C voltage steps and programmable slew rate enable precise, glitch-free voltage transitions aligned with OS scheduler events. |
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 | 25A peak, 2.2MHz, no I²C interface, no ASIL D certification, 3mm × 4mm QFN | Lacks dynamic voltage scaling and functional safety features; suited for non-safety-critical infotainment rails. | Select when cost sensitivity outweighs DVFS and ASIL requirements. |
| TPS659424-Q1 | Multi-rail PMIC with four 12A bucks, I²C, ASIL B - not single-channel; larger 7mm × 7mm package | Integrates multiple rails but shares switching frequency and compensation resources; less optimal for isolated high-current SoC core use. | Select when system-level integration of multiple rails justifies added complexity and footprint. |
Compared with MPQ4436-AEC1 and TPS659424-Q1, the MAX20411CAFHG/VY+ uniquely delivers 30A peak current in a compact 3.5mm × 5mm FCQFN with ASIL D compliance, I²C-based DVFS, and differential remote sensing-making it optimal for standalone, safety-critical SoC core regulation where performance, footprint, and functional safety are jointly prioritized.
Availability
MAX20411CAFHG/VY+ is available at Aetrix Electronics and suitable for automotive ADAS sensor fusion ECUs, central domain controllers, and infotainment SoC core power applications requiring stable component supply, long lifecycle support, and AEC-Q100-compliant sourcing.
Supply support for MAX20411CAFHG/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, communications, and healthcare markets with robust, safety-certified solutions.
The MAX20411 family belongs to Analog Devices' automotive power management portfolio, designed specifically to deliver high-efficiency, ASIL-compliant, dynamically scalable power for next-generation ADAS and zonal architecture SoCs.
FAQ
What is the factory-preset output voltage of the MAX20411CAFHG/VY+?
The MAX20411CAFHG/VY+ has a factory-preset output voltage of 1.2V. This value is fixed at wafer sort and cannot be altered by external resistors. The I²C interface allows dynamic adjustment in 6.25mV steps across the full 0.5V–1.275V range, but the default startup voltage remains 1.2V unless reprogrammed after power-on.
Does the MAX20411CAFHG/VY+ support spread-spectrum frequency modulation?
Yes, the MAX20411CAFHG/VY+ supports spread-spectrum frequency modulation to reduce peak radiated EMI. This feature is enabled via the I²C register bit SPREAD_EN and modulates the 2.1MHz switching frequency over a ±100kHz range. It is particularly effective in meeting CISPR 25 Class 5 emissions limits for automotive front-end modules.
What protection features does the MAX20411CAFHG/VY+ include for automotive safety compliance?
The MAX20411CAFHG/VY+ includes overtemperature shutdown with hysteresis, cycle-by-cycle current limiting, short-circuit protection with hiccup mode, programmable OV/UV detection (±1% accuracy), redundant internal reference, and built-in BIST diagnostics-all contributing to its ASIL D compliance per ISO 26262. These features are validated in the device's safety manual and FMEDA report.
Can the MAX20411CAFHG/VY+ operate with a 1.05MHz switching frequency?
Yes, the MAX20411CAFHG/VY+ can operate at 1.05MHz by pulling the SYNC pin low. This halving of the default 2.1MHz frequency increases inductor and capacitor values but improves light-load efficiency and reduces switching losses in thermally constrained layouts. The MAX20411CAFHG/VY+ maintains full regulation performance and protection functionality at either frequency.
Is the MAX20411CAFHG/VY+ pin-compatible with other variants in the MAX20411 family?
No, the MAX20411CAFHG/VY+ is not pin-compatible with MAX20411A/B/D variants. While all share the same 21-pin FCQFN package and pinout, the internal current-limit thresholds, compensation networks, and thermal derating curves differ per variant (A=16A, B=22A, C=30A, D=40A). Using the wrong variant may cause premature current-limit activation or thermal shutdown under expected load conditions.
MAX20411CAFHG/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:
- 30A
- 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)
MAX20411CAFHG/VY+ FAQ
1.How can I place an order for MAX20411CAFHG/VY+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20411CAFHG/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 MAX20411CAFHG/VY+ reliable?
The price and inventory of MAX20411CAFHG/VY+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20411CAFHG/VY+ is usually 5 days.
3.What payment methods are accepted for MAX20411CAFHG/VY+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20411CAFHG/VY+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20411CAFHG/VY+?
MAX20411CAFHG/VY+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20411CAFHG/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 MAX20411CAFHG/VY+?
For technical support, including MAX20411CAFHG/VY+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20411CAFHG/VY+ requirements.
6.How does Aetrix verify that MAX20411CAFHG/VY+ is sourced from the original manufacturer or authorized distributors?
All MAX20411CAFHG/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 MAX20411CAFHG/VY+ meets industry standards.
7.What is the process for return or replacement of MAX20411CAFHG/VY+?
All MAX20411CAFHG/VY+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20411CAFHG/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 MAX20411CAFHG/VY+ part is unused and in its original packaging.
Return procedure for MAX20411CAFHG/VY+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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