Linear Technology LTC4071EMS8E#PBF - Battery Charger IC

The LTC4071EMS8E#PBF from Linear Technology is a versatile and robust lithium-ion/polymer shunt battery charger system designed for small, low power applications. This IC is capable of charging and protecting single-cell batteries with a small, programmable charge current. It is housed in an MSOP-8 package, making it suitable for space-constrained applications.

The LTC4071 allows for charging from very low current sources such as energy harvesting or intermittent power supplies, with its quiescent current as low as 550nA. This makes it an excellent choice for remote applications, backup power supplies, and any system where power efficiency is critical.

Key Features:

• Low Quiescent Current: The LTC4071 features an ultra-low quiescent current of 550nA, which significantly extends battery life in standby and low-power modes.
• Wide Input Voltage Range: It operates with an input voltage range from 4.3V to 80V, making it versatile for various charging sources and conditions.
• Integrated Thermal Regulation: To protect the battery and the IC itself, the LTC4071 includes an internal thermal regulation mechanism that reduces charge current if the die temperature exceeds a preset threshold.
• Programmable Charge Current: The charge current can be set with a single external resistor, offering flexibility to accommodate different battery capacities and charging profiles.
• Power Good Output: This feature provides a signal when the input supply is above a preset threshold, indicating that the system can safely operate or charge the battery.
• Automatic Recharge: The LTC4071 automatically initiates a new charge cycle when the battery voltage falls below an internal recharge threshold, ensuring the battery remains topped up.
• Multiple Battery Chemistry Support: While optimized for Li-Ion/Polymer batteries, the charger can be used with other battery chemistries by adjusting the float voltage with external resistors.

The LTC4071EMS8E#PBF is not just a simple charger; it is a power management solution that ensures long-term reliability and safety for your battery-powered systems. Its small size, combined with its power efficiency and configurability, make it a top choice for engineers and designers working on portable, wearable, or energy-harvesting technology.