BQ25121 Overview
The bq2512x is a highly integrated battery charge management IC that integrates the most mon functions for wearable devices: Linear charger, regulated output, load switch, manual reset with timer, and battery voltage monitor. The integrated buck converter is a high efficiency, low IQ switcher using DCS control that extends light load efficiency down to 10-µA load currents.
BQ25121 Key Features
- 1 Increases System Operation Time Between Charges
- Configurable 300-mA Buck Regulator (1.8-V Default)
- 700 nA (typical) Iq with Buck Converter Enabled (No Load)
- Configurable Load Switch or 100mA LDO Output (Load Switch by Default)
- Up to 300-mA Charge Current for Fast Charging
- 0.5% Accurate Battery Voltage Regulation (Configurable from 3.6 V to 4.65 V in 10-mV Steps)
- Configurable Termination Current Down to 500 µA
- Simple Voltage Based Battery Monitor
- Highly Integrated Solution with Small Footprint
- 2.5 mm x 2.5 mm WCSP Package and 6 External ponents for Minimal Solution