PCA9420AUKZ

The PCA9420 is a highly-integrated Power Management IC (PMIC), targeted to provide a full power management solution for low power microcontroller applications or other similar applications.

The device consists of a linear battery charger capable of charging up to 315 mA current. It has an I2C programmable Constant Current (CC) and Constant Voltage (CV) values for flexible configuration. Various built-in protection features such as input overvoltage protection, overcurrent protection, thermal protection, etc. are also provided for safe battery charging. It also features JEITA compliant charging.

The device also integrates two step-down (buck) DC/DC converters which have I2C programmable output voltage. Both buck regulators have integrated high-side and lowside switches and related control circuitry, to minimize the external component counts; a Pulse-Frequency Modulation (PFM) approach is utilized to achieve better efficiency under light load condition. Other protection features such as overcurrent protection, under-voltage lockout (UVLO), etc. are also provided. By default, the input for these regulators is powered by either VIN or VBAT, whichever is greater.

In addition, two on-chip LDO regulators are provided to power up various voltage rails in the system.

Other features such as FM+ I2C-bus interface, chip enable, interrupt signal, etc. are also provided.