Description

The MAX77540 is a high-efficiency step-down converterwith two 3A switching phases. It uses an adaptive COT(constant on-time) current-mode control architecture andthe two 3A switching phases can be configured as eitherone (2Φ, 6A) or two (1Φ, 3A each) outputs. Its wide inputvoltage range enables a direct conversion for sub-1V outputsfrom 3-cell Li+ batteries, USB PD, and 12VDC supplyrails. The output voltages are preset with resistors andare further adjustable through an I2C-compatible interface.With 94% peak efficiency, low quiescent current, and compactsolution size, the MAX77540 is ideal for battery powered,space-constraint equipment.Programmable switching frequency, frequency tracking,and spread-spectrum allow easier systemoptimization for noise-sensitive applications. DedicatedEN, POK, and FPWM pins provide options for directhardware control, while more programmable options, suchas soft-start/stop and ramp-up/down slew-rates, are availablethrough I2C. An array of built-in protections insuressafe operation under abnormal operating conditions.Applications2/3-Cell Li+ and USB-C Power Delivery SystemsAudio and Video EquipmentMicroprocessors, field-programmable gate arrays (FPGAs), digital signal processors (DSPs),andapplication-specific integrated circuits (ASICs)Networking and PCIe®/redundant array of inexpensive disks (RAID) Cards