LTC4054LES5-4.2#PBF - Linear Technology

The LTC4054LES5-4.2#PBF is a high-performance, single-cell lithium-ion battery charger integrated circuit produced by Linear Technology, which is now part of Analog Devices. This compact and efficient charging solution is designed for simplicity and ease of use, making it an ideal choice for portable electronic devices that require reliable and fast battery charging.

Key Features

• Precision Charge Voltage: The device is programmed to accurately regulate the charge voltage to 4.2V, which is the optimal charging voltage for most single-cell lithium-ion batteries.
• Integrated Pass Transistor: The LTC4054LES5-4.2#PBF includes an internal MOSFET, which eliminates the need for external power components and simplifies the design.
• Automatic Recharge: Once the charging cycle is complete, the device automatically initiates a new charge cycle if the battery voltage falls below a certain threshold, ensuring the battery remains fully charged.
• Thermal Regulation: To protect the battery and the charger from overheating, the LTC4054LES5-4.2#PBF features thermal regulation that reduces the charge current in the event of high ambient temperatures.
• Charge Current Monitoring: An output pin is available for monitoring the charge current, which allows for additional functionality such as charge termination or charge status indication.
• Low Profile: The device comes in a low-profile (1mm) thinSOT package, which is ideal for space-constrained applications.
• Lead-Free and RoHS Compliant: The LTC4054LES5-4.2#PBF is manufactured to be environmentally friendly, complying with lead-free and RoHS standards.

Applications

The LTC4054LES5-4.2#PBF is suited for a wide range of applications, particularly where space and thermal efficiency are critical. It is commonly used in:

• Cellular Telephones
• Personal Digital Assistants (PDAs)
• Digital Cameras
• MP3 Players
• USB-Powered Devices
• Portable Instruments

With its straightforward pin configuration and minimal external component requirements, the LTC4054LES5-4.2#PBF simplifies the design of battery charging circuits, saving space and cost while providing fast and safe charging for lithium-ion batteries.