I²C 1-cell 1A linear battery charger with integrated buck-boost, DVS buck, LDOs, ADC and power path

The BQ25190 is a highly

integrated battery management unit that integrates the most commonly used functions

for wearable devices: a linear charger with power path, one step-down switching

converter (Buck), one buck-boost switching converter (Buck-boost), two LDOs (LDO1

and LDO2), manual reset with timer (MR) , multi-channel

analog-to-digital converter (ADC), as well as four multifunctional general-purpose

input/outputs (GPIO).

The integrated charger supports charge

current from 5mA to

1A that enables quick and accurate charging while providing a regulated

voltage to the system. The regulated system voltage (VSYS) can be

configured through I2C based on the recommended operating conditions of

the downstream system loads. Other operation parameters such as the input current

limit, charge current, Buck converters’ output voltages, Buck-boost converters’

output voltage, and LDOs’ output voltages are also programmable through the

I2C interface.

The BQ25190 features low quiescent current during

operation and shutdown, which enables longer battery life.