LTC4089EDJC

The LTC4089EDJC is an integrated circuit from LT designed for battery management applications. This component offers crucial protection features such as under-voltage lockout (UVLO) for both current limit and charger circuits, each with a typical hysteresis of 125mV. It also includes a suspend mode, which reduces current draw from the IN pin to 50µA, aligning with USB power specifications. The NTC thermistor input allows for battery temperature qualification, enabling hold mode when temperatures are too hot (around 50°C) or too cold (around 0°C), with approximately 3°C hysteresis to prevent oscillation. The device supports USB and 5V wall adapter power inputs. Its design focuses on protecting the battery and ensuring reliable charging cycles.

This IC is suitable for various power management systems where precise battery monitoring and control are essential. The suspend mode is particularly useful for low-power standby operations. The NTC thermistor feature provides an added layer of safety by preventing charging under extreme temperature conditions. The device's internal under-voltage lockout circuits ensure stable operation by disabling charging and current limit functions until input and output voltages reach safe thresholds.