Step-down buck converter is for multi-cell batteries
Single stage power conversion in multi-cell battery applications is provided with the MAX77540 step-down buck converter. Examples of use are AR / VR headsets, land mobile radios and digital single-lens reflex (DSLR) cameras. The power-dense MAX77540 buck converter features 94 per cent peak efficiency and wafer level packaging that measures 61 per cent smaller than traditional quad flat no-lead (QFN) 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 5.0V or below, and subsequently, stepping down further to system level voltages, are inefficient and therefore impact the battery life of the system. This approach requires an additional converter, which often requires an inductor, ultimately driving a larger footprint and higher cost.
According to Analog Devices, the MAX77540 can create either dual 3.0A or a single 6.0A output(s). Default power on configuration only requires two external resistors, and an I²C interface allows further control for advanced power management techniques. External frequency tracking and spread spectrum modulation provide low EMI power conversions for data sensing and processing equipment
Wide 4.0V to 16V input voltage range and two 3.0A switching phases provide single step conversions to core voltages from USB-C rails and 2S and 3S multi-cell batteries.
Wafer level package measures 61 per cent (2.5 times) smaller than traditional QFN packaging to fit in the most space-constrained applications.
The MAX77540 is available now in a 2.51 x 2.31mm 30-bump wafer-level package (WLP).
The MAX77540EVKIT evaluation board is also available now.