1 Features
1• Operation as Slave Charger to Provide Fast
Charging in Dual Charger Operation
• Simple Configuration with Minimum BOM
• High Efficiency 3-A, 1.5-MHz Switch Mode Buck
Charge
– 92% Charge Efficiency at 3 A and 94% Charge
Efficiency at 2 A Charge Current
– Optimize for High Voltage Input (9 V / 12 V)
– Low Power PFM mode for Light Load
Operations
• Single Input to Support USB Input and Adjustable
High Voltage Adapters
– Support 3.9-V to 14-V Input Voltage Range
– Input Current Limit (100 mA to 3.25 A with 50-
mA resolution) to Support USB2.0, USB3.0
standard and High Voltage Adapters
– Wide Input Dynamic Power Management
(DPM) Range
• Highest Battery Discharge Efficiency with 5-mΩ
Battery MOSFET
• Default Charge Disabled
• Integrated ADC for System Monitor
(Input, System and Battery Voltage, Temperature,
Charge Current)
• Flexible Autonomous and I2C Mode for Optimal
System Performance
• Remote Battery Sensing
• High Integration includes all MOSFETs, Current
Sensing and Loop Compensation
• High Accuracy
– ±0.5% Charge Voltage Regulation
– ±5% Charge Current Regulation
– ±7.5% Input Current Regulation
• Safety
– Thermal Regulation and Thermal Shutdown
– Input UVLO/Overvoltage Protection
– Battery OVP
– Safety Timer

2 Applications
• Smart Phone
• Tablet PC
• Portable Internet Devices

3 Description
The bq25898C is a highly-integrated switch-mode
battery charge management and system power path
management device for single cell Li-Ion and Lipolymer
battery. The device supports high input
voltage for charging. The low impedance power path
optimizes switch-mode operation efficiency, reduces
battery charging time and extends battery life during
discharging phase. The I2C serial interface with
charging and system settings makes the device a
truly flexible solution. The bq25898C is available in a
2.8mm x 2.5mm 42-ball DSBGA package.