Analog Devices Inc./Maxim Integrated MAXM15462AMB+T

Overview

MAXM15462AMB+T from Maxim Integrated is an adjustable-output, synchronous step-down DC-DC power module integrating controller, MOSFETs, compensation, and inductor in a single uSLIC™ package. It operates from 4.5V to 42V input, delivers up to 300mA output current, features ±1.5% feedback accuracy, 4.1ms fixed soft-start, and peak-current-mode control - enabling compact, robust power supplies for space-constrained industrial sensors and 4–20mA loop-powered devices.

For engineers reviewing the MAXM15462AMB+T datasheet, MAXM15462AMB+T pinout, MAXM15462AMB+T application, or MAXM15462AMB+T equivalent, key selection criteria include its 0.9V–5V adjustable output range, open-drain RESET output with 95.5% rising threshold, programmable EN/UVLO, PFM/PWM mode selection, and compliance with CISPR22 Class B emissions.

Technical Context

The MAXM15462AMB+T employs peak-current-mode control architecture with internal compensation, eliminating external loop components. Its fixed 4.1ms soft-start reduces inrush current, while prebias startup supports powered outputs during enable sequencing.

It integrates a 5V LDO (VCC) with 4.75V–5.25V output and 13–50mA current limit, and uses an open-drain RESET pin that asserts low when FB falls below 92% of regulation voltage, with 2ms delay after recovery. The MODE pin selects between fixed-frequency PWM (MODE = GND) and light-load PFM operation (MODE floating).

Key Specifications

Pinout & Package

MAXM15462AMB+T is housed in a low-profile, thermally enhanced 10-pin uSLIC™ package (2.6mm × 3mm × 1.5mm), compatible with standard reflow processes and optimized for high-density PCB layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar step-down power module applications.

Compared with MAXM15463AMB+T and MAXM15464AMB+T, the MAXM15462AMB+T provides design flexibility through its adjustable output, enabling single-BOM support for multiple voltage variants and future-proofing against changing system requirements - at the cost of two external resistors.

Availability

MAXM15462AMB+T is available at Aetrix Electronics and suitable for industrial sensors and encoders, 4–20mA current-loop powered sensors, and HVAC and building control systems requiring stable component supply, long-term manufacturability, and guaranteed lifecycle support.

Supply support for MAXM15462AMB+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

Maxim Integrated, now part of Analog Devices, designs high-performance analog and mixed-signal ICs for industrial, automotive, and communications markets.

The Himalaya uSLIC™ power module product line targets space-constrained, thermally demanding applications - delivering fully integrated, easy-to-use DC-DC solutions that replace complex discrete buck designs with plug-and-play reliability.

FAQ

What is the output voltage adjustment range for MAXM15462AMB+T?

The MAXM15462AMB+T supports an adjustable output voltage range from 0.9V to 5V, set via an external resistor divider connected between the OUT and FB pins. The internal feedback reference is 0.90V ±1.5%, enabling precise regulation across this range. This flexibility allows the MAXM15462AMB+T to serve diverse rail requirements - such as 1.8V for microcontroller cores or 3.3V for digital interfaces - without redesigning the power stage.

Does MAXM15462AMB+T require external compensation components?

No, the MAXM15462AMB+T is internally compensated and requires no external compensation components. Its peak-current-mode control architecture integrates all necessary compensation circuitry, allowing designers to omit traditional Type II or Type III compensation networks. This simplifies layout, reduces BOM count, and eliminates tuning effort - making the MAXM15462AMB+T truly plug-and-play for most 300mA step-down applications.

How does the RESET pin on MAXM15462AMB+T function?

The RESET pin on MAXM15462AMB+T is an open-drain power-good output that goes high-impedance when FB rises above 95.5% of its regulation voltage and pulls low when FB falls below 92%. A 2ms delay is applied after FB recovery before RESET asserts high-impedance. This behavior enables reliable system-level power sequencing and fault detection. External pull-up is required, and the MAXM15462AMB+T's RESET timing is fully specified across temperature and load conditions.

Can MAXM15462AMB+T operate with prebiased outputs?

Yes, the MAXM15462AMB+T supports prebias startup - it can safely start up into an already-biased output without damaging downstream circuitry or causing output overshoot. This capability is confirmed in typical operating waveforms (e.g., toc53, toc54, toc59, toc60), where startup occurs with 2V prebias on VOUT. Prebias tolerance makes the MAXM15462AMB+T suitable for hot-swap and redundant power architectures common in industrial control systems.

What is the thermal performance of MAXM15462AMB+T on a standard PCB?

On a four-layer evaluation board with natural convection, the MAXM15462AMB+T exhibits a junction-to-ambient thermal resistance (θ_JA) of 41.56°C/W. Its rated ambient operating range is –40°C to +125°C, with junction temperature limited to +150°C. Derating curves (e.g., toc86) confirm 300mA output is sustainable up to +105°C ambient at 2.5V output - validating suitability for sealed, fanless enclosures in HVAC and industrial environments.