STC3115IQT

Battery Management Overview

The STC3115IQT is a fuel gauge IC designed for lithium-ion and lithium-polymer battery monitoring in handheld applications. It operates within a supply voltage range of 2.7 V to 4.5 V and supports a maximum output voltage of 4.35 V. The device functions across an operating temperature range of -40°C to +85°C with a typical supply current of 45 µA. It utilizes a DFN-10 surface-mount package.

Battery Management Feature Summary

• Implements the OptimGauge algorithm combining Coulomb counting and voltage measurements for state-of-charge estimation
• Includes an internal temperature sensor for automatic compensation
• Features programmable alarm outputs for low state-of-charge and low voltage conditions
• Supports battery swap detection and robust initial open-circuit-voltage measurement

Battery Management Applications

• Handheld electronic devices
• Portable equipment requiring battery management
• IoT terminal applications

Battery Management Procurement Notes

Verify the specific suffix 'IQT' corresponds to the DFN-10 package variant when sourcing. Confirm RoHS compliance status through official documentation. Ensure compatibility with I2C interface requirements for system integration. Check datasheet for moisture sensitivity levels and reflow soldering profiles prior to assembly.

Battery Management Selection Notes

Select this component for applications requiring mixed-mode gas gauging with low power consumption. The DFN-10 package suits space-constrained designs compared to larger alternatives. Consider the 45 µA operating current for battery life optimization. Verify that the 2.7 V to 4.5 V input range aligns with the target battery chemistry and system voltage rails.

Battery Management Part Context

The STC3115IQT belongs to the STMicroelectronics STC3115 series, part of the OptimGauge family. This series focuses on providing accurate fuel gauge solutions for portable electronics. The IQT designation specifically identifies the industrial temperature grade and DFN-10 packaging configuration within the product line.

Battery Management Replacement Considerations

STC3115AIJT is a documented alternative within the same series, offering similar functionality in a CSP-12 package.