• High Accuracy Coulomb Counter Measures Accumulated Battery Charge and Discharge
• Operation Voltage Range: 3.6V to 25V
• 12-bit ADC Measures Voltage and Current 
• 1% Voltage, Current and Charge Accuracy 
• ±64mV Sense Voltage Range for Current ADC
• High Side Sense for Current ADC
• Low Value External Current Sense Resistor
• Low Quiescent Current
• Configurable Alert Output/Charge Complete Input
• I2C Interface
• Compact DFN3×3-8 Package
• AEC-Q100 Qualified for Automotive Applications 

    --Temperature Grade 2: –40°C to +105°C 

The SY2A55209 is a gas gauge IC for multi-cell batteries in handheld and portable equipment. It senses battery terminal voltage, charging/discharging current by an internal 12-bit ADC. The wide input voltage range allows user with multi-cell batteries up to 25V. An accurate coulomb counter integrates current through a sense resistor between the battery’s positive terminal and the load/charger. The test results are stored in internal registers which is accessible via the I2C Interface.

The SY2A55209 has programmable high and low thresholds for all measured quantities. If a programmed threshold is exceeded, the device will communicate an alert using either the alert response procedure or by setting a flag in the internal status register.