Step-down converter boasts 94 % peak efficiency

18th January 2022
Mick Elliott

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

The device is in stock at distributor Digi-Key Electronics

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