Analog Devices Inc./Maxim Integrated MAX26406AFODY+T

Overview

MAX26406AFODY+T from Analog Devices is a fully integrated, synchronous Silent Switcher® buck converter delivering up to 6A continuous output current with 3V–36V input range and fixed 5V or 3.3V output (or adjustable 0.8V–10V). It features 2.1MHz/400kHz fixed switching frequency, 10μA no-load quiescent current in skip mode, and 99% dropout operation-designed for automotive infotainment power rails and industrial 24V point-of-load regulation.

For engineers reviewing the MAX26406AFODY+T datasheet, MAX26406AFODY+T pinout, MAX26406AFODY+T application, or MAX26406AFODY+T equivalent, key selection criteria include its FC2QFN-17 package thermal performance (θJB = 10.2°C/W), dual-phase current-sharing capability via VEA/SYNCOUT, ±1% output accuracy in FPWM mode, and spread-spectrum EMI reduction with ±3% frequency modulation.

Technical Context

The MAX26406AFODY+T implements average current-mode control with internal slope compensation, enabling robust noise immunity and precise dynamic current sharing in dual-phase configurations. Its MAXQ® power architecture delivers high phase margin and transient response without external compensation.

It integrates high-side (45mΩ typ) and low-side (22mΩ typ) DMOS FETs, a 1.8V BIAS regulator, PGOOD monitoring, and programmable soft-start (2.5ms typ). Operation includes forced-PWM (SYNC = BIAS) and ultra-low-IQ skip mode (SYNC = GND), with hiccup-mode short-circuit protection and thermal shutdown at 165°C.

Key Specifications

Pinout & Package

MAX26406AFODY+T is housed in a 3.5mm × 3.75mm, 17-pin FC2QFN package with exposed thermal pad (PGND-connected) for low-impedance heat transfer and symmetrical VIN/PGND pin layout optimized for EMI suppression.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous buck converter applications.

Compared with LM61460QWRNXTQ1 and TPS546B24RVFT, the MAX26406AFODY+T uniquely combines 36V operation, Silent Switcher EMI performance, and hardware-based dual-phase current sharing in a 3.5mm × 3.75mm package-enabling compact, robust, and scalable power delivery where input voltage range, thermal density, and electromagnetic compatibility are co-critical.

Availability

MAX26406AFODY+T is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial 24V PLCs, telecom small-cell base stations, and server management controllers requiring stable component supply across extended temperature and high-reliability environments.

Supply support for MAX26406AFODY+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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, industrial automation, automotive, and communications markets.

The MAX26406AFODY+T belongs to the MAX264xx Silent Switcher® buck converter family, engineered specifically for high-density, low-EMI power conversion in automotive and industrial applications where input voltage range, thermal efficiency, and regulatory compliance are non-negotiable.

FAQ

What is the maximum continuous output current of the MAX26406AFODY+T?

The MAX26406AFODY+T delivers up to 6A continuous output current under typical thermal conditions (TA ≤ +70°C, 4-layer board). At higher ambient temperatures or with limited airflow, output current must be derated per the thermal resistance data (θJB = 10.2°C/W); for example, at TA = +85°C, maximum sustainable current is ~4.8A assuming 40°C rise above ambient.

Does the MAX26406AFODY+T support adjustable output voltages?

Yes, the MAX26406AFODY+T supports adjustable output voltages from 0.8V to 10V using an external resistor divider connected between OUT, FB, and GND. For fixed outputs, connect FB directly to BIAS to select factory-configured 3.3V or 5.0V. The feedback reference voltage is 0.800V ±1.6%, enabling precise regulation across temperature and load.

How does the MAX26406AFODY+T achieve low EMI performance?

The MAX26406AFODY+T achieves low EMI through Analog Devices' Silent Switcher® architecture: integrated dual-loop layout with symmetrical hot-loop routing, spread-spectrum frequency modulation (±3% dither), and FC2QFN package with symmetrical VIN/PGND pin arrangement. These features collectively reduce peak radiated emissions by >20dB, enabling CISPR 25 Class 5 compliance without shielding or ferrites.

Can the MAX26406AFODY+T operate in dual-phase configuration?

Yes, the MAX26406AFODY+T supports dual-phase operation using the VEA and SYNCOUT pins. One device acts as controller (SYNC = BIAS), generating a 180° out-of-phase clock on SYNCOUT; the second acts as target (SYNCOUT connected to BIAS), with VEA pins tied together for dynamic current sharing. This configuration delivers up to 12A with <5% current mismatch under transient loads.

What protection features are built into the MAX26406AFODY+T?

The MAX26406AFODY+T includes overtemperature shutdown (165°C, 20°C hysteresis), hiccup-mode short-circuit protection (25ms off-time), overcurrent limiting (7.5A–10A depending on variant), input UVLO (2.95V rising), and BIAS UVLO (1.58V). All protections are fully integrated-no external components required-and remain active across the full -40°C to +125°C operating range.