MAX77540 Step-down converter boasts 94 % peak efficiency

MAX77540 Step-down converter boasts 94 % peak efficiency

The MAX77540 from Maxim Integrated is a high-efficiency step-down converter with two 3 A switching phases.

It uses an adaptive COT (constant on-time) current-mode control architecture, and the two 3 A switching phases can be configured as either one (2Φ, 6 A) or two (1Φ, 3 A each) outputs. Its wide input voltage range enables a direct conversion for sub-1 V outputs from 3-cell Li+ batteries, USB PD, and 12 VDC supply rails.

The output voltages are preset with resistors and are further adjustable through an I2C-compatible interface.

With 94% peak efficiency, low quiescent current, and compact solution size, the MAX77540 is ideal for battery-powered, space-constrained equipment.

Features include 4 V to 16 V input voltage for single-stage conversion and less than 55 mm2 total solution size for high power density.

Applications cover consumer, industrial automation, communications, building and infrastructure, and healthcare

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Mike is the founder and editor of, an electronics engineering community/news and project sharing platform. He studied Electronics and Physics and enjoys everything that has moving electrons and fun. His interests lying on solar cells, microcontrollers and switchmode power supplies. Feel free to reach him for feedback, random tips or just to say hello :-)

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