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.