PMIC and Multifunction

Combining a high performance battery charger with one or more integrated DC/DC regulators, Analog Devices’ multifunction Battery Charger Plus products provide battery charging and multiple system rails in both portable and other types of products. A high level of integration is offered by the Battery Charger Plus devices in a small footprint, with small total solution size and ease of use. The on-chip DC/DC regulator(s) may be either a switching regulator for maximum efficiency and battery run time, or a linear regulator for design simplicity. Key charger features include standalone operation with onboard charge termination, high charge current accuracy and float voltage accuracy.

Analog Devices’ Multi-topology DC/DC power management products incorporate DC/DC regulators of different types and topologies. Products in this category offer two or more regulators, combining buck (step-down), boost (step-up), buck/boost (step-down / step-up), SEPIC, linear and/or inverting switching regulators in a single, compact package. Applications for these multitopology DC/DC products include split positive and negative supplies for high performance op amps, DACs, ADCs and signal conditioning circuitry, feature-rich portable, industrial or medical devices or space-constrained systems requiring multiple power supplies combined into a single, compact IC.

A power management integrated circuit (PMIC) is a highly integrated device with many functional circuit blocks onboard. The high level of integration provides many benefits, including reduced printed circuit board (PCB) space, simpler design, faster time to market, and a reduced bill of material (BoM) cost. Analog Devices’ PMICs with battery chargers or USB power managers address battery charging and provide multiple system rails in portable products, all in a compact form factor. PowerPath control allows for seamless transitions and manages power flow between different input sources such as a wall adapter, USB port, and lithium battery while preferentially providing power to the system load. Highly efficient switch-mode power battery management enables higher charge currents from both wall adapter and USB-based power sources. For this family of PMICs, standalone operation, high charge current, and float voltage accuracy and thermal regulation are key battery charger features; additionally, dc-to-dc converters include both switching and linear regulators.

Analog Devices’ USB Power Manager battery charging and management products utilize key battery charging features but also include a PowerPath circuit topology that enables managed power flow, allowing a load to be powered from both VIN and the battery, shorter charging times, instant-on operation (even with a dead battery), and offer more flexibility for the device designer. Both linear charging for simplicity, and switchmode for higher charging efficiency topologies are offered. Other key features of the USB Power Manager family include standalone operation with onboard charge termination, high voltage operation and thermal regulation.