Linear Technology LTC4058XEDD-4.2#PBF Battery Charger

The LTC4058XEDD-4.2#PBF is a high-efficiency, standalone linear battery charger manufactured by Linear Technology, designed to charge single-cell lithium-ion batteries. Its compact design and advanced features make it an ideal solution for portable devices where space is at a premium and performance is paramount.

Key Features

• Input Voltage Range: The device operates from an input voltage range of 4.25V to 6.5V, making it versatile for various power supply configurations.
• Charge Current: The LTC4058XEDD-4.2#PBF can deliver up to 750mA of charge current, which can be programmed via a single resistor.
• Precision End-of-Charge Control: The charger has a precision end-of-charge control with ±1% charge voltage accuracy, ensuring the battery is charged safely and efficiently to its peak capacity.
• Thermal Regulation: To protect the battery and the charger from overheating, it features thermal regulation that maximizes the charge rate without risk of overheating.
• No External MOSFET, Sense Resistor or Blocking Diode Required: This simplifies the design and reduces the overall component count and board space.

Charging Safety and Efficiency

The LTC4058XEDD-4.2#PBF incorporates a number of safety features to protect both the charger and the battery during the charging process. These include automatic recharge, an over-temperature charge suspension, and a charge current monitor for gas gauging. Additionally, the device has a C/10 charge termination and an optional shutdown mode, which reduces the supply current to 25uA, further enhancing battery life.

Applications

Due to its compact size and comprehensive feature set, the LTC4058XEDD-4.2#PBF is ideally suited for a wide range of portable electronic applications. These include handheld instruments, Bluetooth earpieces, portable medical equipment, and other small battery-powered devices where efficient charging is critical.

Package and Quality

The charger comes in a small 10-pin DFN package (3mm x 3mm), which is lead-free and RoHS compliant. Linear Technology ensures high-quality standards, making the LTC4058XEDD-4.2#PBF a reliable choice for designers looking to integrate a robust charging solution into their applications.