1 Features

Single chip solution to charge wearable accessories from adapter or battery
High-efficiency, 1.5-MHz, synchronous switch-mode buck charger
- 95.5% charge efficiency at 0.5 A and 94.5% efficiency at 1 A
- ±0.5% charge voltage regulation (10-mV step)
- I²C programmable JEITA profile of charge voltage, current and temperature thresholds
- Low termination current with high accuracy 20 mA±10 mA
- Small inductor form factor of 2.5 x 2.0 x 1.0 mm³
Boost mode with output from 4.6 V to 5.15 V
- 94% boost efficiency at 1-A output
- Integrated control to switch between Charge and Boost mode
- PMID_GOOD pin control external PMOS FET for protection against fault conditions
Single input supporting USB input, high-voltage adapter, or wireless power
- Support 4-V to 13.5-V input voltage range with 22-V absolute max input rating
- Programmable input current limit (IINDPM) with I²C (100 mA to 3.2 A, 100-mA/step)
- Maximum power tracking by input voltage limit (VINDPM) up to 5.4 V
- VINDPM threshold automatically tracks battery voltage
Narrow VDC (NVDC) power path management
- System instant-on with no battery or deeply discharged battery
Flexible I²C configuration and autonomous charging for optimal system performance
High integration includes all MOSFETs, current sensing and loop compensation
Low R_DSON 19.5-mΩ BATFET to minimize charging loss and extend battery run time
- BATFET control for Ship mode, and full system reset with and without adapter
7-µA low battery leakage current in Ship mode
9.5-µA low battery leakage current with system standby
High accuracy battery charging profile
- ±6% charge current regulation
- ±7.5% input current regulation
- Remote battery sensing to charge faster
- Programmable top-off timer for full battery charging
Safety Related Certifications:
- IEC 62368-1 CB Certification