LTC4054ES5-4.2#TRMPBF - Standalone Linear Li-Ion Battery Charger

The LTC4054ES5-4.2#TRMPBF is a high-quality linear battery charger IC designed and manufactured by Linear Technology, now part of Analog Devices, for single-cell lithium-ion batteries. This compact, SOT-23 packaged integrated circuit is an ideal charging solution for portable electronic devices due to its simplicity, efficiency, and space-saving design.

Key Features:

• Automatic Recharge: The LTC4054ES5-4.2#TRMPBF automatically initiates a new charging cycle when the battery voltage falls below a preset threshold, ensuring that the battery stays fully charged.
• Charge Current: It offers programmable charge current up to 800mA through an external resistor, allowing for flexibility in designing for various battery capacities.
• Charge Termination: The device includes an automatic termination feature upon charge completion, signaled by the status pin, which helps to prevent overcharging and extend battery life.
• Thermal Regulation: To protect against overheating, the LTC4054ES5-4.2#TRMPBF has a thermal regulation feature that reduces charge current if the die temperature rises to a potentially unsafe level.
• No External MOSFET, Sense Resistor or Blocking Diode Required: This simplifies the design and minimizes the external component count, leading to a cost-effective and space-efficient charging solution.
• Presets for 4.2V Li-Ion Cells: The charging voltage is fixed at 4.2V, which is suitable for most Li-Ion cells, ensuring a proper and safe charging cycle.
• Small Package: The SOT-23 package is ideal for space-constrained applications, making it a popular choice for handheld and wearable devices.

Applications:

The LTC4054ES5-4.2#TRMPBF is widely used in a variety of applications, including:

• Portable Electronic Devices
• Cellular Telephones
• Digital Cameras
• MP3 Players
• USB-Powered Gadgets

With its precision end-of-charge voltage, negligible battery drain when the input supply is removed, and the ability to withstand up to 10V on the input, the LTC4054ES5-4.2#TRMPBF stands out as a robust and reliable choice for managing the charging requirements of Li-Ion batteries in a wide array of portable devices.