Analog Devices Inc./Maxim Integrated MAXM15463AMB+

Overview

MAXM15463AMB+ from Maxim Integrated is a fixed-output 3.3V, 300mA synchronous step-down DC-DC power module with integrated controller, MOSFETs, compensation, and inductor. It operates from 4.5V to 42V input, delivers ±1.5% feedback accuracy, features peak-current-mode control, and includes open-drain RESET output - designed for compact, low-noise industrial sensor and 4–20mA loop-powered systems.

For engineers reviewing the MAXM15463AMB+ datasheet, MAXM15463AMB+ pinout, MAXM15463AMB+ application, or MAXM15463AMB+ equivalent, this page provides verified electrical specifications, thermal derating data, soft-start timing (4.1ms), PFM/PWM mode selection, and validated alternative options for LDO replacement and battery-powered equipment designs.

Technical Context

The MAXM15463AMB+ employs peak-current-mode control architecture with internal compensation and fixed 4.1ms soft-start to limit inrush current. Its feedback regulation voltage is precisely 3.30V (±1.5%) when FB is connected directly to OUT, enabling stable fixed-output operation without external resistors.

It integrates an internal LDO (VCC) delivering 5V ±2.5% at up to 30mA, supports programmable EN/UVLO threshold (1.215V typ), and implements hiccup-mode overcurrent protection with thermal shutdown at +166°C (10°C hysteresis). The device complies with CISPR22 Class B conducted/radiated emissions standards.

Key Specifications

Pinout & Package

MAXM15463AMB+ uses a 10-pin uSLIC™ package (2.6mm × 3mm × 1.5mm), optimized for high-density PCB layouts and automated assembly. The low-profile module integrates all power components - no external inductor or compensation network required.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar fixed-output DC-DC power module applications.

Compared with MAXM15463AMB+, MAXM15464AMB+ offers identical performance in a drop-in 5V variant, while TFS7703-3.3 provides isolation and wider input range at the cost of size, efficiency, and non-drop-in layout compatibility.

Availability

MAXM15463AMB+ 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 lifecycle assurance, and RoHS-compliant packaging.

Supply support for MAXM15463AMB+ 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 applications - emphasizing integration, reliability, and ease of use.

The Himalaya uSLIC™ power module family, including MAXM15463AMB+, was engineered to replace discrete buck regulators and LDOs with fully integrated, thermally optimized, and EMC-compliant modules for space- and time-constrained power designs.

FAQ

What is the output voltage tolerance of the MAXM15463AMB+ under full load and temperature variation?

The MAXM15463AMB+ guarantees ±1.5% feedback regulation accuracy over load (0–300mA) and temperature (−40°C to +125°C ambient). Measured output voltage remains within 3.25V to 3.35V across all conditions, confirmed by production testing per the datasheet's FB-regulation voltage specification (3.25V to 3.35V at TA = +25°C, MODE = GND).

Can the MAXM15463AMB+ start up into a prebiased output voltage?

Yes, the MAXM15463AMB+ supports prebias startup - it safely ramps the output from an initial voltage (e.g., 2V) without injecting reverse current. This behavior is validated in the datasheet's "Startup Through Enable" waveforms (toc53, toc59, toc60) and enables use in hot-swap and redundant power architectures where the output may already be energized.

Does the MAXM15463AMB+ require external compensation components?

No, the MAXM15463AMB+ is internally compensated. All compensation networks - including type-II or type-III compensation - are integrated within the module. No external resistors or capacitors are needed on the FB node or elsewhere, reducing design risk and board area versus discrete buck controllers.

What is the thermal performance of the MAXM15463AMB+ on a standard four-layer PCB?

On a standard four-layer evaluation board, the MAXM15463AMB+ exhibits a junction-to-ambient thermal resistance (θJA) of 41.56°C/W. At 300mA output and 24V input, typical power dissipation is ~0.3W, resulting in ~12.5°C junction rise above ambient - well within the +150°C max junction limit even at +125°C ambient.

How does the RESET pin function on the MAXM15463AMB+?

The RESET pin on the MAXM15463AMB+ is an open-drain output that goes low when FB drops below 92% of its nominal value (e.g., <3.04V for 3.3V output) and returns to high-impedance 2ms after FB rises above 95.5% (e.g., >3.16V). It requires an external pullup resistor to a valid logic supply (e.g., 3.3V or 5V) to generate a clean power-good signal for system monitoring.