USB Li-Ion charger in a 3x3 TQFN
The MAX14578AEETE+T is a dedicated USB Li-Ion battery charger IC from Analog Devices, packaged in a 16-TQFN (3x3 mm) with exposed pad for thermal management. It targets single-cell Lithium Ion packs at a 4.2V float voltage, drawing from a USB supply rail up to 5.5V.
Surface-mount on a 16-WFQFN with exposed pad — the 3x3 mm footprint and 0.5 mm pitch require a solder stencil aperture sized for the pad geometry, not the package outline. CT suits prototype or low-volume builds.