Analog Devices Inc./Maxim Integrated

The MAX20355 is a Power Line Communication (PLC) master with ModelGaugeTMm5 EZ fuel gauge and buckboost converter. The MAX20355 and MAX20357 provide a complete system solution for charging and data transfer between a charging case and a battery-powered device over a single contact.The PLC interface is capable of 100kpbs throughput while simultaneously providing 400mA of total charging/system current. A 4Mbaud half-duplex dataonly UART mode provides an easy and fast method for firmware updates, debugging interface, and factory modes.MAX20355 utilizes a 3.3W buck-boost converter with dynamic voltage scaling (DVS) to automatically manage the charging voltage based on the slave device MAX20357 control signal.Additional features include comprehensive slave device insertion and removal notifications, moisture detection, overcurrent protection, and 8kV contact rated ESD protection on the PLC outputs.APPLICATIONSTWS HeadphonesAugmented Reality GlassesWearable Devices

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

The MAX20361 is a fully integrated solution for harvesting energy from single-/multi-cell solar sources. The device includes an ultra-low quiescent current (360nA) boost converter that is capable of starting from input voltages as low as 225mV (typ). In order to maximize the power extracted from the source, the MAX20361 implements a proprietary maximum power point tracking (MPPT) technique that allows efficient harvesting from 15μW to over 300mW of available input power.The MAX20361 also features an integrated charging and protection circuit that is optimized for Li-ion batteries, but can also be used to charge supercapacitors, thin-film batteries, or traditional capacitors. The charger features a programmable charging cut-off voltage with thresholds programmable through I2C interface as well as temperature shutoff.The MAX20361 is available in a 12-bump, 0.4mm pitch, 1.63mm x 1.23mm wafer-level package (WLP).ApplicationsWearable FitnessMedical DevicesIndustrial IoT SensorsAsset Tracking DevicesWireless Sensor Networks