Linear Technology's LTC4065EDC#PBF: Compact USB Power Manager and Li-Ion/Polymer Battery Charger

The LTC4065EDC#PBF from Linear Technology is a highly integrated power management and battery charger IC designed for single-cell lithium-ion or lithium-polymer batteries. This compact solution is tailored for portable USB-powered devices, combining the functionality of a power manager, battery charger, and protection circuit in a tiny 2mm x 2mm DFN package. Its small footprint and the minimal number of external components required make it an ideal choice for space-constrained applications.

The device offers a programmable charging current up to 950mA, allowing for fast and efficient charging of batteries from a USB port or a dedicated charger. The LTC4065EDC#PBF automatically adjusts the charge current based on the capabilities of the power source, ensuring safe and optimal charging under various conditions. With its wide input voltage range from 4.25V to 6.5V, it can accommodate a variety of USB specifications and external power supplies.

Featuring a charge current monitor, the LTC4065EDC#PBF allows for accurate measurement of the battery charge current, which can be used for gas gauging or to monitor charging progress. The end-of-charge control is signaled by an onboard charge termination timer, providing a clear indication when the battery reaches full capacity.

Safety is paramount in battery charging, and the LTC4065EDC#PBF includes several protection features. It has automatic recharge, thermal regulation to prevent overheating, and a shutdown mode that reduces battery drain when not in use. Additionally, it offers undervoltage lockout, automatic recharge, and C/10 charge termination to ensure the battery is charged safely and efficiently.

The LTC4065EDC#PBF is also characterized by its low-profile (0.75mm) package and its ability to operate over a wide temperature range, making it suitable for a diverse range of portable applications including digital cameras, MP3 players, PDAs, smartphones, and other USB-powered gadgets. With its ease of integration and comprehensive feature set, the LTC4065EDC#PBF stands out as a robust and versatile charging solution for modern portable electronics.

For designers and engineers looking to incorporate a reliable and compact charging solution into their USB-powered devices, the LTC4065EDC#PBF from Linear Technology offers an excellent balance of performance, size, and ease of use.