STC3115


STMicroelectronics' new battery charge indicators provide reliable runtimes for mobile devices

The STC3115 includes the hardware functions required to implement a low-cost gas gauge for battery monitoring. The STC3115 uses current sensing, Coulomb counting and accurate measurements of the battery voltage to estimate the state-of-charge (SOC) of the battery. An internal temperature sensor simplifies implementation of temperature compensation.

An alarm output signals a low SOC condition and can also indicate low battery voltage. The alarm threshold levels are programmable.

The STC3115 offers advanced features to ensure high-performance gas gauging in all application conditions.


Healthcare and Wellness
Key Features
  • OptimGaugeTM algorithm
  • 0.25% accuracy battery voltage monitoring
  • Coulomb counter and voltage-mode gas gauge operations
  • Robust initial open-circuit-voltage (OCV) measurement at power up with debounce delay
  • Low battery level alarm output with programmable thresholds
  • Internal temperature sensor
  • Battery swap detection
  • Low power: 45 μA in power-saving mode, 2 μA max in standby mode
  • 1.4 x 2.0 mm 10-bump CSP package

STC3115 Series

Manufacturer Part Number Description Available Quantity Datasheets
STC3115IJT IC GAS GAUGE LI-ION/POL 10CSP 2818
STC3115AIJT IC GAS GAUGE W/ALARM 10CSP 2494

Eval Board

Manufacturer Part Number Description Available Quantity Datasheets
STEVAL-ISB014V2 BOARD EVAL FOR STC3115 6