LTC4054LES5-4.2#TRMPBF - Standalone Linear Li-Ion Battery Charger

The LTC4054LES5-4.2#TRMPBF is a highly compact, standalone linear battery charger designed by Linear Technology for single-cell lithium-ion batteries. This efficient integrated circuit (IC) is tailored to simplify the charging process for portable electronic devices, making it an ideal solution for space-constrained applications such as personal digital assistants (PDAs), cellular phones, digital cameras, and MP3 players.

Key Features

• Precision Charging: The LTC4054LES5-4.2#TRMPBF provides a precise end-of-charge voltage of 4.2V, ensuring the lithium-ion battery is charged to its optimal voltage level, enhancing the overall lifespan and performance of the battery.
• Programmable Charge Current: The charge current can be programmed up to 800mA, allowing for flexibility in charging speed and efficiency based on the specific requirements of the application.
• Automatic Recharge: The device includes an automatic recharge feature, initiating a new charging cycle when the battery voltage falls below a certain threshold, keeping your device's battery topped up without manual intervention.
• Thermal Regulation: To protect against overheating, the LTC4054LES5-4.2#TRMPBF incorporates an internal thermal regulation mechanism that automatically reduces the charge current in the event of excessive temperature rise.
• Charge Termination: The IC terminates the charge cycle when the charging current drops below a preset level after the final float voltage is reached, ensuring energy efficiency and preventing overcharging.
• No External MOSFET, Sense Resistor, or Blocking Diode Required: This IC is designed to minimize external component count, which simplifies the design and reduces overall system cost.
• Small Package: Available in a small SOT-23 package, the LTC4054LES5-4.2#TRMPBF saves valuable board space and is suitable for compact designs.

Applications

The LTC4054LES5-4.2#TRMPBF is versatile and can be used across a variety of applications where efficient charging and space economy are crucial. It is particularly well-suited for portable electronic devices that require reliable and consistent charging without the need for complex circuitry.

Conclusion

Linear Technology's LTC4054LES5-4.2#TRMPBF simplifies the charging process for lithium-ion batteries by integrating all necessary functions into a single chip. With its precision charging capabilities, programmable current, and robust safety features, this battery charger IC stands out as a superior solution for designers looking to optimize their portable power management systems.