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Analog Devices Inc./Maxim Integrated MAX20411AAFHE/VY+
- Part No.:
- MAX20411AAFHE/VY+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 21-PowerWFQFN
- Datasheet:
-
MAX20411AAFHE/VY+.pdf
- Description:
- IC REG BUCK PROG 16A 21FC2QFN
- Quantity:
- Payment:
- Shipping:
Inventory:420
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Product details
Overview
MAX20411AAFHE/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 over load/line/temperature, featuring I²C-controlled voltage adjustment and ASIL D compliance for SoC core power in ADAS systems.
For engineers reviewing the MAX20411AAFHE/VY+ datasheet, MAX20411AAFHE/VY+ pinout, MAX20411AAFHE/VY+ application, or MAX20411AAFHE/VY+ equivalent, key selection factors include its 2.1MHz fixed-frequency PWM operation, differential remote sensing, factory-preset output voltage (1.0V), AEC-Q100 Grade 1 qualification (-40°C to +125°C), and integrated BIST diagnostics with PEC-enabled I²C interface.
Technical Context
The MAX20411AAFHE/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 switching (default) or 1.05MHz via SYNC pin configuration.
Differential remote sensing (RS+/RS−) enables accurate load-point regulation; integrated low-RDS(ON) FETs, spread-spectrum frequency modulation, and RESET output with programmable OV/UV (±1% accuracy) support robust automotive power delivery under dynamic load and EMI-constrained conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 40A peak - supports high-power SoC cores without external current sharing. |
| Input Voltage Range | 3.0V to 5.5V - compatible with automotive 3.3V/5V supply rails and post-regulation stages. |
| Output Voltage Range | 0.5V to 1.275V in 6.25mV steps - fine-grained I²C-programmable VOUT for adaptive core scaling. |
| Switching Frequency | 2.1MHz (default) - enables compact all-ceramic filter design and fast transient response. |
| Output Accuracy | ±0.75% over load/line/temperature - ensures stable SoC operation across full automotive thermal range. |
| Safety Certification | ASIL D compliant with BIST and redundant reference - meets ISO 26262 requirements for safety-critical ADAS power rails. |
| Operating Temperature | -40°C to +125°C (Grade 1) - qualified per AEC-Q100 for under-hood and domain controller environments. |
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; internal pull-down ensures default OFF state. |
| RESET | Power-Good Output | Open-drain signal indicating valid VOUT within ±5% window; supports system reset coordination. |
| RS+, RS− | Differential Sense Inputs | Enable Kelvin connection to load for ±0.75% regulation accuracy despite PCB IR drop. |
| SDA, SCL | I²C Bidirectional Interface | Supports dynamic VOUT adjustment, fault readback, and PEC-protected register access. |
| BST | Bootstrap Capacitor Connection | Drives high-side FET gate; requires 0.1µF ceramic capacitor between BST and SW pins. |
| LX | Switch Node | Connects to external inductor; high di/dt node requiring tight layout and ground stitching. |
| PGND, GND, AV | Ground Terminals | Separate power (PGND), analog (AV), and digital (GND) grounds minimize noise coupling in mixed-signal SoC supplies. |
Key Features
| Feature | Design Value |
|---|---|
| MAXQ® Power Architecture | Hybrid load-line + integrator compensation delivers >60° phase margin and <10µs load-step recovery for SoC DVFS. |
| Spread-Spectrum Modulation | Reduces peak radiated EMI by >10dB at 2.1MHz fundamental, easing CISPR 25 Class 5 compliance. |
| Programmable Soft-Start | Configurable 0.5ms–10ms ramp prevents inrush current during cold-start and hot-plug events. |
| Overtemperature Protection | Thermal shutdown at +150°C with hysteresis; auto-recovery after cooldown to +135°C. |
| Short-Circuit Protection | Current-limit foldback with hiccup mode prevents thermal runaway during sustained output faults. |
Applications
| Automotive ADAS Domain Controller | Automotive SoC Core Supply |
|---|---|
Use Scenario: Powering NVIDIA Orin or Qualcomm SA8540P SoCs in L2+/L3 ADAS ECUs with dynamic voltage/frequency scaling. IC Role / Device Role / Timing Role: Primary core rail regulator with I²C-based DVFS coordination and real-time fault telemetry. Use Value: ±0.75% output accuracy and <10µs transient response maintain SoC timing margins under 10A/µs load steps. | Use Scenario: Delivering 1.0V @ 30A to ARM Cortex-A78 clusters in zonal gateway controllers. IC Role / Device Role / Timing Role: High-current point-of-load regulator with differential remote sensing to compensate for 50mV PCB voltage drop. Use Value: Side-wettable FCQFN package enables AOI-compatible assembly and 125°C continuous operation in confined chassis spaces. |
| Automotive Radar Processor Supply | Automotive Infotainment Application Processor |
Use Scenario: Supplying TI AWR2944 mmWave radar SoC requiring clean, low-noise 1.0V core rail with fast transient immunity. IC Role / Device Role / Timing Role: Low-EMI, spread-spectrum regulated supply with RESET synchronization to radar frame timing. Use Value: 2.1MHz fixed-frequency PWM minimizes beat frequencies with radar chirp clocks while enabling all-ceramic output filtering. | Use Scenario: Powering Qualcomm Snapdragon Automotive Cockpit Platforms with multi-rail sequencing and thermal monitoring. IC Role / Device Role / Timing Role: I²C-configurable core supply supporting dynamic performance states (e.g., LPM ↔ Turbo modes). Use Value: PEC-protected I²C interface and BIST diagnostics enable functional safety validation per ISO 26262 ASIL D requirements. |
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 | 30A peak, 2.2MHz, no I²C, no BIST, ±1.0% accuracy | Lacks ASIL D diagnostics and dynamic voltage scaling; suitable for non-safety-critical auxiliary rails | Select when cost sensitivity outweighs functional safety and DVFS needs. |
| TPS659424-Q1 | Multi-rail PMIC (4 buck + LDOs), 12A max per buck, 1.2MHz, I²C + ASIL B | Integrated multi-rail solution with lower per-rail current; not a single-channel 40A replacement | Select when consolidating multiple rails into one IC outweighs peak current and transient performance requirements. |
Compared with MPQ4436-AEC1 and TPS659424-Q1, the MAX20411AAFHE/VY+ uniquely delivers 40A peak current with ASIL D compliance, ±0.75% accuracy, and I²C-programmable slew rates-making it the only option for safety-critical, high-dynamic-range SoC core supplies in next-gen ADAS.
Availability
MAX20411AAFHE/VY+ is available at Aetrix Electronics and suitable for automotive ADAS domain controllers, SoC core power delivery, and radar processor supply applications requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.
Supply support for MAX20411AAFHE/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 power delivery for advanced driver-assistance systems and AI-enabled SoCs, emphasizing ASIL D compliance, ultra-fast transient response, and integration of diagnostics and programmability in a compact FCQFN package.
FAQ
What output voltage is factory-preset on the MAX20411AAFHE/VY+?
The MAX20411AAFHE/VY+ is factory-preset to 1.0V output voltage. 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 boot-up voltage remains 1.0V unless reprogrammed via I²C after power-on.
Does the MAX20411AAFHE/VY+ support both 2.1MHz and 1.05MHz switching frequencies?
Yes, the MAX20411AAFHE/VY+ operates at 2.1MHz by default. Pulling the SYNC pin low selects 1.05MHz operation. This dual-frequency capability allows designers to optimize between EMI performance (lower frequency) and component size/transient response (higher frequency), without changing external components or firmware.
Is the MAX20411AAFHE/VY+ pin-compatible with other variants in the MAX20411 family?
Yes, all MAX20411 variants-including MAX20411A (16A), MAX20411B (22A), MAX20411C (30A), and MAX20411D (40A)-share identical 21-pin side-wettable FCQFN packages and pinouts. The MAX20411AAFHE/VY+ uses the same footprint and layout as other members, enabling scalable current design with no PCB revision required.
What safety diagnostics does the MAX20411AAFHE/VY+ provide for ASIL D compliance?
The MAX20411AAFHE/VY+ integrates built-in self-test (BIST) for internal voltage references and comparators, redundant reference paths, parity error checking (PEC) on I²C transactions, and programmable overvoltage/undervoltage protection with ±1% accuracy. These features collectively satisfy diagnostic coverage requirements for ISO 26262 ASIL D in automotive power safety islands.
Can the MAX20411AAFHE/VY+ operate with all-ceramic output capacitors?
Yes, the MAX20411AAFHE/VY+ is designed for all-ceramic output capacitor configurations. Its 2.1MHz fixed-frequency PWM control, combined with current-mode architecture and MAXQ® compensation, ensures stability with low-ESR ceramic capacitors-eliminating the need for electrolytic or tantalum types and reducing board area and lifetime reliability risks.
MAX20411AAFHE/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:
- 16A
- 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)
MAX20411AAFHE/VY+ FAQ
1.How can I place an order for MAX20411AAFHE/VY+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20411AAFHE/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 MAX20411AAFHE/VY+ reliable?
The price and inventory of MAX20411AAFHE/VY+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20411AAFHE/VY+ is usually 5 days.
3.What payment methods are accepted for MAX20411AAFHE/VY+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20411AAFHE/VY+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20411AAFHE/VY+?
MAX20411AAFHE/VY+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20411AAFHE/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 MAX20411AAFHE/VY+?
For technical support, including MAX20411AAFHE/VY+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20411AAFHE/VY+ requirements.
6.How does Aetrix verify that MAX20411AAFHE/VY+ is sourced from the original manufacturer or authorized distributors?
All MAX20411AAFHE/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 MAX20411AAFHE/VY+ meets industry standards.
7.What is the process for return or replacement of MAX20411AAFHE/VY+?
All MAX20411AAFHE/VY+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20411AAFHE/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 MAX20411AAFHE/VY+ part is unused and in its original packaging.
Return procedure for MAX20411AAFHE/VY+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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