LTC4053EMSE-4.2 - Standalone Linear Li-Ion Battery Charger with Thermal Regulation

The LTC4053EMSE-4.2 is a highly integrated battery charger manufactured by Linear Technology, designed for single-cell lithium-ion batteries. This advanced charger provides a simple and efficient charging solution, making it an ideal choice for portable electronic devices such as smartphones, digital cameras, and MP3 players.

Key features of the LTC4053EMSE-4.2 include its ability to charge from a USB port or an external power supply. The charger operates over a wide input voltage range and can deliver up to 800mA of continuous charge current (adjustable with an external resistor). Its small form factor and minimal external component requirements make it a perfect fit for space-constrained applications.

The LTC4053EMSE-4.2 incorporates a precise end-of-charge control that terminates the charge cycle when the charge current falls to 10% of the programmed value after the final float voltage is reached. This ensures the battery is charged safely and efficiently. Additionally, the charger features a float voltage accuracy of ±1%, providing a consistent and reliable charge every time.

For safety, the LTC4053EMSE-4.2 has built-in thermal regulation that maximizes the charge rate without the risk of overheating. It automatically reduces the charge current if the die temperature rises to a preset threshold, protecting both the battery and the charger. Other safety features include automatic recharge, overvoltage protection, and a charge status output that can directly drive an LED.

The device is available in a compact 10-lead MSOP package, making it easy to integrate into a variety of designs. With its comprehensive set of features and protections, the LTC4053EMSE-4.2 stands out as a robust and reliable solution for charging lithium-ion batteries efficiently and safely.

Whether you are designing a new piece of portable electronics or looking to upgrade an existing product, the LTC4053EMSE-4.2 from Linear Technology offers a compact, high-performance charging solution that will extend the life and reliability of your lithium-ion powered devices.