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Analog Devices Inc./Maxim Integrated MAX42410AFOB+
- Part No.:
- MAX42410AFOB+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 17-PowerWFQFN
- Datasheet:
-
MAX42410AFOB+.pdf
- Description:
- IC REG BUCK ADJ 10A 17FC2QFN
- Quantity:
- Payment:
- Shipping:
Inventory:636
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Product details
Overview
MAX42410AFOB+ from Analog Devices is a fully integrated 36V, 10A synchronous buck converter with internal high-side and low-side MOSFETs, 1.5MHz fixed switching frequency, 0.8V–6V programmable output voltage, and dual-phase capability enabling up to 20A systems. It delivers high efficiency (93.9% at 12VIN/3.3VOUT) in industrial point-of-load power delivery.
For engineers reviewing the MAX42410AFOB+ datasheet, MAX42410AFOB+ pinout, MAX42410AFOB+ application, or MAX42410AFOB+ equivalent, key selection considerations include its 10A current rating, 1.5MHz/400kHz frequency optioning via part number, 36ns minimum on-time for high step-down ratios, dual-phase synchronization interface, and thermally enhanced 3.5mm × 3.75mm FC2QFN package with symmetric SUP/PGND layout for EMI control.
Technical Context
The MAX42410AFOB+ implements average current-mode control with a 36ns minimum on-time, enabling stable operation across wide input-to-output voltage ratios (e.g., 36VIN to 3.3VOUT). Its dual-phase architecture uses SYNCOUT-to-SYNC interconnection and shared VEA nodes to achieve dynamic current sharing and 180° out-of-phase switching between controller and target ICs.
It integrates a 1.8V BIAS linear regulator with 2.2μF output capacitance requirement, supports forced PWM or skip-mode via SYNC pin logic level, and features cycle-by-cycle overcurrent protection with hiccup-mode short-circuit recovery. Thermal shutdown activates at +175°C with 20°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 36V - supports wide industrial DC bus inputs including 24V and 36V nominal rails. |
| Max Output Current | 10A - rated continuous RMS current per phase; enables single-chip 10A PoL without external FETs. |
| Switching Frequency | 1.5MHz (fixed) - allows compact 0.68μH inductors and reduces output ripple vs. lower-frequency alternatives. |
| Output Voltage Range | 0.8V to 6V - programmable via external resistor divider; optimized for core voltages and intermediate bus regulation. |
| Quiescent Current | 20μA in skip mode - enables ultra-low-power standby in battery-backed or always-on industrial systems. |
| Min On-Time | 36ns - supports high step-down ratios (e.g., 36V→3.3V at ~9% duty cycle) without pulse skipping instability. |
| Thermal Resistance θJA | 27°C/W (on 4-layer eval board) - enables 10A operation with minimal heatsinking in compact layouts. |
| Protection Features | Overtemperature shutdown (+175°C), hiccup-mode short-circuit, cycle-by-cycle current limit - ensures robust field reliability without external supervision. |
Pinout & Package
The MAX42410AFOB+ is housed in a thermally enhanced 3.5mm × 3.75mm, 17-pin FC2QFN package with exposed PGND paddle for efficient heat dissipation and symmetric SUP/PGND pin placement to minimize high-current loop area and improve EMI performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN | Enable Input | High-voltage compatible (up to 42V) logic input; drives IC into shutdown (4μA IQ) when low. |
| BST | Bootstrap Supply | Connects 0.1μF ceramic capacitor to LX to generate gate drive voltage for internal high-side FET. |
| SUP (Pins 3, 9) | IC & High-Side Supply | Dual-input pins internally connected; bypassed with 0.1μF + 4.7μF ceramics for low-noise gate drive and bias supply. |
| PGND (Pins 4, 5, 7, 8) | Power Ground | Four dedicated low-impedance ground terminals for high-current return paths; must be tied together and connected to thermal pad. |
| LX | Switch Node | Connection to buck inductor; high-impedance when disabled; requires tight layout to minimize EMI and switching losses. |
| BIAS | Internal LDO Output | 1.8V regulated output powering internal circuitry; requires ≥2.2μF ceramic capacitor to GND for stability. |
| FB | Voltage Feedback Input | Monitors output via resistor divider; 0.8V reference with ±1.5% accuracy enables precise regulation across temperature. |
| OUT | Output Sense Input | Direct connection to output rail for accurate voltage sensing; improves load regulation vs. remote-sense alternatives. |
| VEA | Error Amplifier Output | Exposed node for dual-phase current sharing; connects controller and target VEA pins to balance phase currents. |
| PGOOD | Open-Drain Status | Asserts low during soft-start or if VOUT drops below 93% of setpoint; requires external pull-up to BIAS or VOUT. |
| SYNC | Mode Control / Sync In | Logic-level input: high = forced PWM, low = skip mode, external clock = sync source; configures operating mode. |
| SYNCOUT | 180° Clock Output | Outputs inverted clock in FPWM mode; used to synchronize second IC in dual-phase configuration. |
| GND | Analog Ground | Separate analog reference; connected to PGND at single star point to avoid noise coupling into feedback path. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-phase scalability | Two MAX42410AFOB+ ICs deliver up to 20A with dynamic current sharing and 180° phase interleaving-reducing input/output ripple by ~50% vs. single-phase. |
| Ultra-low light-load IQ | 20μA quiescent current in skip mode enables >1-year battery life in always-on sensor nodes or industrial controllers with intermittent wake cycles. |
| Dropout operation | 96% max duty cycle allows regulation down to VOUT ≈ 0.96 × VIN, supporting applications like 24V-to-23V post-regulation in legacy industrial equipment. |
| EMI-optimized pinout | Symmetric SUP and PGND pin placement creates balanced high-current loops that cancel magnetic fields-reducing radiated emissions without added filtering. |
| Robust protection suite | Integrated hiccup-mode short-circuit response, thermal shutdown with 20°C hysteresis, and cycle-by-cycle current limiting eliminate need for external fault management circuitry. |
| Small solution size | 3.5mm × 3.75mm FC2QFN footprint with 1.5MHz operation enables total solution area < 150mm² for 10A PoL-ideal for space-constrained PLC modules and motor drives. |
Applications
| Industrial PLC I/O Modules | Factory Automation Sensors |
|---|---|
Use Scenario: Powering isolated analog input/output channels and digital I/O banks in modular programmable logic controllers operating from 24V DC rails. IC Role / Device Role / Timing Role: Primary 10A buck regulator delivering stable 3.3V/5V to microcontrollers, ADCs, and isolated gate drivers within each I/O slot. Use Value: Dual-phase capability allows redundant 10A/phase design for hot-swappable modules; dropout mode maintains regulation during brownouts common in factory floor power distribution. | Use Scenario: Providing clean, low-noise 3.3V power to MEMS accelerometers, temperature transmitters, and IO-Link masters in harsh industrial environments. IC Role / Device Role / Timing Role: Point-of-load converter located adjacent to sensor signal chain; operates in skip mode during sleep cycles to extend battery or energy-harvesting runtime. Use Value: 20μA quiescent current and 36ns min-on-time enable direct 24V-to-3.3V conversion without pre-regulator-reducing component count and BOM cost by 30% vs. two-stage solutions. |
| Motor Drive Control Boards | Distributed DC Power Systems |
Use Scenario: Generating gate driver and MCU supply rails on compact servo drive control boards where thermal density and EMI are critical constraints. IC Role / Device Role / Timing Role: High-efficiency 10A buck supplying 15V to isolated gate drivers and 3.3V to ARM Cortex-M7 MCU; synchronized to system clock via SYNC pin. Use Value: 1.5MHz switching and symmetric SUP/PGND layout reduce conducted EMI below CISPR-32 Class A limits-eliminating need for ferrite beads or common-mode chokes. | Use Scenario: Scalable power building block in distributed architectures such as modular robotics, automated guided vehicles (AGVs), and rail signaling systems. IC Role / Device Role / Timing Role: One MAX42410AFOB+ per subsystem (e.g., vision camera, motion controller, safety PLC); configured in dual-phase for centralized 20A power hubs. Use Value: Pin-to-pin compatibility with MAX42405/06 family enables seamless upgrade from 5A/6A to 10A designs without PCB rework-accelerating time-to-market for higher-power variants. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-current buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX42410AFOA+T | Same 10A rating and 36V input, but 400kHz switching frequency and 0.8V–10V output range. | Better suited for higher-output-voltage applications (e.g., 12V intermediate bus) and designs prioritizing efficiency over size. | Select MAX42410AFOA+T when output >6V is required or when lower switching loss outweighs PCB area constraints. |
| LM61480RQR | Texas Instruments 10A buck with 4.5–36V input, 1.5MHz option, but no dual-phase sync or VEA sharing; 25μA IQ in PFM mode. | Lacks native dual-phase coordination-requires external current-sharing circuitry for >10A; less integrated for scalable power systems. | Choose LM61480RQR only if dual-phase operation is unnecessary and TI's WEBENCH ecosystem is preferred for design support. |
Compared with MAX42410AFOA+T, the MAX42410AFOB+ trades wider output voltage range for higher-frequency operation and smaller magnetics; versus LM61480RQR, it provides superior integration for multi-phase systems through dedicated SYNCOUT/VEA interfaces and lower quiescent current-reducing system-level complexity and component count in scalable industrial power designs.
Availability
MAX42410AFOB+ is available at Aetrix Electronics and suitable for industrial automation, distributed DC power systems, and motor drive control boards requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for MAX42410AFOB+ 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 digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets with precision power, sensing, and signal chain solutions.
The MAX42408/MAX42410 product line was designed specifically for high-density, high-reliability industrial point-of-load regulation-emphasizing thermal robustness, dual-phase scalability, ultra-low IQ, and EMI resilience in harsh electromagnetic environments.
FAQ
What is the maximum output current rating of the MAX42410AFOB+?
The MAX42410AFOB+ is rated for 10A continuous output current under typical thermal conditions (θJA = 27°C/W on 4-layer board). This rating assumes proper PCB layout with adequate copper pour and thermal vias under the PGND paddle. Derating applies above +70°C ambient; full 10A operation is guaranteed from –40°C to +125°C junction temperature.
Does the MAX42410AFOB+ support dual-phase operation, and how is it configured?
Yes, the MAX42410AFOB+ supports dual-phase operation to deliver up to 20A. Configuration requires one IC as controller (SYNC tied high) and the other as target (SYNCOUT connected to BIAS). The controller's SYNCOUT drives the target's SYNC pin, establishing 180° phase shift. VEA pins are connected to enable dynamic current sharing, while separate FB dividers maintain output accuracy per phase.
What is the purpose of the VEA pin on the MAX42410AFOB+?
The VEA pin on the MAX42410AFOB+ is the internal voltage-loop error amplifier output. In dual-phase configurations, connecting the VEA pins of controller and target ICs forces shared voltage regulation and enables precise dynamic current balancing between phases. In single-phase use, VEA is left unconnected and has no functional role.
Can the MAX42410AFOB+ operate in dropout mode, and what is its maximum duty cycle?
Yes, the MAX42410AFOB+ supports dropout operation with a maximum duty cycle of 96%. This allows regulation when VOUT approaches VIN (e.g., 24V input → 23V output), making it suitable for applications requiring minimal voltage drop across the regulator, such as maintaining power during brownout conditions in industrial control systems.
What are the key thermal characteristics of the MAX42410AFOB+ package?
The MAX42410AFOB+ uses a 3.5mm × 3.75mm FC2QFN package with exposed PGND thermal pad. Its junction-to-ambient thermal resistance is 27°C/W on a 4-layer evaluation board and 38.6°C/W on a JEDEC-standard board. The junction-to-case (θJC) is 8.5°C/W (eval board) and 7.7°C/W (JEDEC), confirming efficient heat transfer through the bottom paddle when properly soldered to a large copper area with ≥6 thermal vias.
MAX42410AFOB+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 17-PowerWFQFN
- Packaging:
- Tray
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 36V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 6V
- Current - Output:
- 10A
- Frequency - Switching:
- 1.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 17-FC2QFN (3.5x3.75)
MAX42410AFOB+ FAQ
1.How can I place an order for MAX42410AFOB+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX42410AFOB+ 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 MAX42410AFOB+ reliable?
The price and inventory of MAX42410AFOB+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX42410AFOB+ is usually 5 days.
3.What payment methods are accepted for MAX42410AFOB+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX42410AFOB+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX42410AFOB+?
MAX42410AFOB+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX42410AFOB+ 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 MAX42410AFOB+?
For technical support, including MAX42410AFOB+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX42410AFOB+ requirements.
6.How does Aetrix verify that MAX42410AFOB+ is sourced from the original manufacturer or authorized distributors?
All MAX42410AFOB+ 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 MAX42410AFOB+ meets industry standards.
7.What is the process for return or replacement of MAX42410AFOB+?
All MAX42410AFOB+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX42410AFOB+, 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 MAX42410AFOB+ part is unused and in its original packaging.
Return procedure for MAX42410AFOB+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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