The LTC4057ES5-4.2#TRPBF is a compact, high-efficiency, linear battery charger from Linear Technology designed for single-cell lithium-ion batteries. This advanced charging solution is housed in a small SOT-23 package, making it an ideal choice for space-constrained applications such as portable devices, wearables, and IoT sensors.

Key Features

• Single Cell Charger: Specifically tailored for charging a single-cell lithium-ion battery with precision.
• Constant-Current/Constant-Voltage Operation: Utilizes a CC/CV charging profile, which is essential for maintaining the health and longevity of lithium-ion batteries.
• Programmable Charge Current: Offers flexibility in charging by allowing the user to set the charge current through a single external resistor.
• Automatic Recharge: Includes a feature to automatically initiate a new charging cycle when the battery voltage falls below a preset threshold.
• Thermal Regulation: Protects the LTC4057ES5-4.2#TRPBF from overheating by automatically reducing charge current during high temperature conditions.
• Charge Status Output: Provides a status signal that can be used to indicate charging progress or completion.
• Low Dropout Voltage: Designed to operate effectively even with a low input voltage difference, ensuring efficient charging across a range of conditions.
• No External MOSFET, Sense Resistor, or Blocking Diode Required: Simplifies the design and reduces the external component count, saving both space and cost.

Applications

The LTC4057ES5-4.2#TRPBF's compact size and feature set make it suitable for a variety of applications, including:

• Portable Electronic Devices
• Wearable Technology
• Wireless Headsets and Earbuds
• Bluetooth Devices
• Medical Devices
• Smart Sensors and IoT Devices

Quality and Reliability

Linear Technology is known for its commitment to quality and reliability, and the LTC4057ES5-4.2#TRPBF is no exception. This product is manufactured to the highest standards to ensure consistent performance and longevity, making it a reliable choice for critical and demanding applications.