Linear Technology's LTC4055EUF#TRPBF USB Power Manager and Li-Ion Charger

The LTC4055EUF#TRPBF is a highly integrated power management and battery charger IC designed by Linear Technology to specifically address the needs of USB-powered portable devices. This compact, efficient solution is ideal for charging single-cell lithium-ion batteries and provides a seamless interface between USB power, wall adapter supply, and the battery charging function.

Key Features

• USB Compatibility: The device complies with USB specifications, allowing for standardized charging from any USB port.
• Integrated PowerPath™ Control: It features Linear Technology's PowerPath control which intelligently manages power distribution between the battery and the load.
• Programmable Charge Current: The LTC4055EUF#TRPBF allows for programmable charge current up to 950mA, making it versatile for various battery capacities.
• Automatic Load Prioritization: The IC automatically gives load priority to the system load over battery charging, ensuring device operation even with a weak battery when connected to USB.
• Safety Features: It includes multiple safety features such as overvoltage protection, thermal regulation, and a timer for charge termination to ensure safe and reliable operation.
• Thermal Feedback: Thermal feedback regulates the charge current to limit the temperature rise during operation, which enhances the safety and longevity of the device.
• Thin QFN Package: The LTC4055EUF#TRPBF comes in a compact, low-profile (0.75mm) 16-lead QFN package, ideal for space-constrained applications.

Applications

The versatile nature of the LTC4055EUF#TRPBF makes it suitable for a wide range of portable devices, including:

• Smartphones and PDAs
• Digital Cameras
• Portable Media Players
• Handheld GPS Systems
• USB-Powered Gadgets

With its advanced features, the LTC4055EUF#TRPBF from Linear Technology stands out as a comprehensive power management solution that simplifies the design of USB-powered devices while ensuring efficient charging and safe operation. Its integration capabilities enable designers to minimize component count, save board space, and reduce overall system cost, making it an excellent choice for modern portable electronics.