Introducing the LT4054ES42: A High-Performance Linear Charger

The LT4054ES42 is a cutting-edge linear charger for single-cell lithium-ion batteries, developed by Linear Technology. It stands out with its compact design and efficient charging capabilities, making it an ideal choice for portable applications. This advanced charger is engineered to offer a simple yet powerful solution for managing the charging process, ensuring that your devices are powered reliably and safely.

Key Features

• Optimized Charging: The LT4054ES42 is optimized for single-cell lithium-ion batteries, providing a constant-current/constant-voltage charge characteristic with a maximum charge current of 800mA. This ensures that your battery is charged quickly and efficiently.
• Adjustable Charge Current: Users can set the charge current from 100mA to 800mA by selecting the appropriate resistor value, offering flexibility for different battery capacities and thermal environments.
• Integrated Thermal Regulation: To protect against overheating, the LT4054ES42 includes an internal thermal feedback loop that regulates the charge current to maintain a safe temperature during operation.
• Automatic Recharge: Once the charging process is complete, the charger automatically initiates a new charge cycle if the battery voltage falls below a certain threshold, keeping your device ready to go at all times.
• Charge Status Indication: The charger provides a status output that can be used to drive an LED, indicating whether the battery is charging or fully charged.
• Low Dropout Voltage: The low dropout voltage of the LT4054ES42 maximizes charging efficiency, especially in low input voltage scenarios.
• Preserved Battery Energy: A low quiescent current ensures minimal battery drain when the charger is not actively charging or when the input supply is removed.

Applications

The LT4054ES42 is versatile and can be used in a variety of portable electronic devices, including:

• Personal Digital Assistants (PDAs)
• Cellular Phones
• Digital Cameras
• MP3 Players
• Portable Medical and Fitness Equipment

With its robust feature set and straightforward implementation, the LT4054ES42 from Linear Technology provides a reliable and efficient solution for your charging needs, ensuring your devices are always powered up and ready for use.