The MAX20356 is a highly integrated and programmable power-management solution designed for ultra-low-power wearable applications. It is optimized for size and efficiency to enhance the value of the end product by extending battery life and shrinking the overall solution size. A flexible set of power-optimized voltage regulators including multiple buck converters, a buck-boost converter, and linear regulators provide a high level of integration and the ability to create a fully optimized power architecture. The quiescent current of each regulator is ultra-low to extend battery life in always-on applications.The MAX20356 includes a complete battery-management solution with battery seal, charger, power path, and fuel gauge. Both thermal management and input protection are built into the charger. The device also includes a factory-programmable button controller with multiple inputs that are customizable to fit specific product user requirements.A low-noise, 1.5W buck-boost converter provides highly efficient and clean power conversion required for the LEDs used in optical heart-rate systems such as PPG and SPO2measurements. The MAX20356 is also equipped with a nano IQfast transient LDO, optimized for use in analog front-end (AFE) sensors. The MAX20356 is configurable through an I2C interface that allows for programming various functions and reading the device status, including the ability to read temperature and supply voltages through the monitor multiplexer.The MAX20356 is available in a 63-bump, 0.5mm pitch, 3.71mm x 4.48mm, wafer-level package (WLP) and operates over the −40°C to +85°C extended temperature range.ApplicationsWearable DevicesIoT