BQ25120YFPT

The BQ25120YFPT from Texas Instruments is a highly integrated battery charge management IC suitable for wearable and IoT devices. It combines essential functions including a linear charger, regulated output, load switch, manual reset with timer, and battery voltage monitor.

The device features a configurable 300mA buck regulator with a 1.8V default output and supports up to 300mA charge current for fast charging. It operates from a 3.4V to 5.5V input voltage range and includes I²C communication for control of various parameters like charge voltage, current, and termination threshold. The low quiescent current of 700nA (typical) with the buck converter enabled helps maximize battery life.

This IC is housed in a compact 25-DSBGA package, requiring minimal external components for a complete solution. It also includes power path management for system power and battery charging, enabling a ship mode with less than 50nA quiescent current for extended shelf life.

Key features include configurable load switch or 100mA LDO output, 0.5% accurate battery voltage regulation, and fault protection against over-temperature, over-voltage, and short circuits. The BQ25120YFPT is designed for applications requiring efficient battery management in space-constrained designs.