Step-down buck converter reduces space in multi-cell battery applications

Analog Devices has released the MAX77540 step-down buck converter, which provides single-stage power conversion in multi-cell battery applications, such as ARVR headsets, LMRs and DSLR cameras. The power-dense MAX77540 buck converter features 94% peak efficiency and wafer-level packaging measures 61% smaller than conventional quad flat no-lead packages.

Multi-cell battery applications require two-stage power conversion and long battery life in the smallest package possible. Traditional methods, such as using a front-end converter to step down to 5V or below, and subsequently, stepping down further to system-level voltages, are inefficient and impact the system's battery life. This approach requires an additional converter, often needing an inductor, ultimately driving a larger solution footprint and higher cost.

With the device, the design engineer can easily create a dual 3A or a single 6A output(s). Default power-on configuration only needs two external resistors, and an I²C interface allows extra control for advanced power management techniques. External frequency tracking and spread spectrum modulation give low EMI power conversions for data sensing and processing equipment.