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DATA SHEET
BQ25121A Low IQ Highly Integrated Battery Charge Management Solution for Wearables and IoT
1 Features
- Increases system operation time between charges
- Configurable 300-mA buck regulator
(2.5-V default) - 700-nA (typical) Iq
with buck converter enabled (no load)
- Configurable load switch or 100-mA 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
- Watchdog timer disabled
- Highly integrated solution with small footprint
- 2.5-mm x 2.5-mm WCSP Package and six external
components for minimal solution
- Push-button wake-up and reset with adjustable timers
- Power path management for powering the system and
charging the battery
- Power path management enables <50 nA Ship Mode battery quiescent current for
longest shelf life
- Battery charger operates from 3.4 V – 5.5 VIN (5.5-V OVP / 20-V tolerant)
- Dedicated pins for input current limit, charge current, termination current, and status output
- I2C communication control
- Charge voltage and current
- Termination threshold
- Input current limit
- VINDPM Threshold
- Timer options
- Load switch control
- System output voltage adjustment
- LDO output voltage adjustment
- Safety-Related Certification:
- TUV IEC 62368-1 Certification
2 Applications
- Smart watches and other wearable
devices
- Fitness accessories
- Health monitoring medical
accessories
- Rechargeable toys
