The PCA9420/21 are highly integrated power management ICs (PMICs), targeted to provide power management solution for low-power microcontroller applications or other similar applications powered by Li-ion battery and/or 5 V adapter non-portable applications. These devices integrate 2x buck converters, 2x LDOs with programmable output voltage range. PCA9420 also integrates a linear battery charger capable of charging up to 315 mA current with I²C programmable constant current (CC) and constant voltage (CV) values. The chips are offered in 2.09 mm x 2.09 mm, 5 x 5 bump, 0.4 mm pitch WLCSP package; and 3 mm x 3 mm, 24-pin QFN package.