Analog Devices Inc./Maxim Integrated MAX42410AFOA+T

Overview

MAX42410AFOA+T from Analog Devices is a fully integrated 36V, 10A synchronous buck converter with internal high-side and low-side MOSFETs, 400kHz fixed switching frequency, 0.8V–10V programmable output voltage, and dual-phase capability supporting up to 20A when paired. It delivers high efficiency (up to 95.6% at 12V_IN/3.3V_OUT) in industrial point-of-load power supplies.

For engineers reviewing the MAX42410AFOA+T datasheet, MAX42410AFOA+T pinout, MAX42410AFOA+T application, or MAX42410AFOA+T equivalent, key selection criteria include its 10A continuous output current at 400kHz, 10μA quiescent current in skip mode, PGOOD monitoring, thermal shutdown protection, and FC2QFN-17 package with symmetric SUP/PGND layout for EMI control.

Technical Context

The MAX42410AFOA+T implements average current-mode control with 36ns minimum on-time, enabling stable operation across wide input-output voltage ratios (e.g., 36V_IN to 3.3V_OUT). Its dual-phase architecture uses VEA node coupling and 180° out-of-phase SYNCOUT to achieve dynamic current sharing between controller and target ICs.

It integrates a 1.8V BIAS linear regulator with 2.2μF output capacitor requirement, supports dropout operation via >96% duty cycle, and features cycle-by-cycle current limiting with hiccup-mode short-circuit protection. The EN input enables shutdown with 4μA quiescent current, while SYNC pin selects forced PWM, skip mode, or external clock synchronization.

Key Specifications

Pinout & Package

MAX42410AFOA+T is housed in a 3.5mm × 3.75mm, 17-pin FC2QFN package with exposed thermal pad. Symmetric SUP and PGND pin placement reduces loop inductance and improves EMI performance. All PGND pins (pins 4, 5, 7, 8, and 9) must be connected together; SUP pins (3 and 9) are internally tied.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-current buck converter applications.

Compared with MAX42408AFOA+T, the MAX42410AFOA+T provides 2A higher current capability in identical footprint and feature set; versus LM61480RQR, it offers native dual-phase scalability, lower IQ, and superior EMI layout advantages - making it the preferred choice for 10A+ industrial PoL systems demanding reliability and design reuse.

Availability

MAX42410AFOA+T is available at Aetrix Electronics and suitable for industrial automation, distributed DC power systems, and ruggedized motor drive controllers requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for MAX42410AFOA+T 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 MAX424xx family targets high-density industrial point-of-load regulation, emphasizing thermal efficiency, EMI robustness, and scalable multi-phase architectures - directly addressing challenges in PLCs, motor drives, and modular power systems.

FAQ

What is the maximum output current rating of the MAX42410AFOA+T?

The MAX42410AFOA+T is rated for 10A continuous output current at 400kHz switching frequency, as confirmed in the Electrical Characteristics table (ILIM = 11.9–16A typical/maximum). This rating assumes proper thermal management using the FC2QFN-17 package's exposed thermal pad and recommended PCB copper area per Analog Devices' layout guidelines. Derating applies above +70°C ambient.

Does the MAX42410AFOA+T support dual-phase operation, and how is it configured?

Yes, the MAX42410AFOA+T supports dual-phase operation up to 20A total load. Configuration requires one IC as controller (SYNC tied high) and another as target (SYNCOUT connected to BIAS). The controller's SYNCOUT drives the target's SYNC pin at 180° phase offset, while VEA pins are connected to enable dynamic current sharing. No external components are needed beyond standard bypass capacitors.

What is the quiescent current of the MAX42410AFOA+T in skip mode?

The MAX42410AFOA+T achieves 10μA quiescent current in skip mode, as stated in the General Description and verified in the Electrical Characteristics table (ISUP = 20μA typical under light-load PWM, with skip mode reducing it further). This ultra-low IQ is enabled by pulling the SYNC pin low and is critical for battery-powered industrial sensors and always-on control systems.

Can the MAX42410AFOA+T operate in dropout mode, and what is its maximum duty cycle?

Yes, the MAX42410AFOA+T supports dropout operation with a maximum duty cycle of 96%, allowing regulation when VOUT approaches VSUP (e.g., 24V input to 23V output). This capability is explicitly documented in the Electrical Characteristics table under "Maximum Duty Cycle" and enables reliable operation during input brownouts common in industrial 24V DC systems.

What package type and pin count does the MAX42410AFOA+T use?

The MAX42410AFOA+T uses a 3.5mm × 3.75mm FC2QFN-17 package with 17 pins and an exposed thermal pad. This package is confirmed in the Package Information section (Outline Number 21-100699) and Pin Configurations diagram. Its symmetric SUP/PGND layout and multiple ground pins are optimized for thermal dissipation and EMI reduction in high-current applications.