LTC4054E Battery Management SMD IC SOT-23-5

LTC4054E Battery Management SMD IC SOT-23-5

The LTC4054E is a complete, linear charger designed for single-cell lithium-ion batteries, offering a constant-current/constant-voltage charging method. It’s housed in a small, thin SOT-23-5 package, ideal for space-constrained applications. Its compact design and low component count make it highly suitable for portable electronics, where size and efficiency are crucial.

This charger is capable of delivering up to 800mA charge current (with proper thermal management) and features thermal regulation to prevent overheating. It operates with a fixed 4.2V output voltage, maintaining high accuracy for safe charging. The device includes various power-saving features, including automatic recharge and low current shutdown modes when the input supply is removed.

The LTC4054E requires minimal external components, eliminating the need for MOSFETs, sense resistors, and blocking diodes, simplifying design and saving space. It also provides critical protections, such as undervoltage lockout, thermal feedback, and charge termination upon reaching full charge, ensuring safe and reliable battery management.

Features:

• No need for external MOSFET or sense resistor.
• Thermal regulation to prevent overheating.
• Programmable charge current up to 800mA.
• Automatic recharge when battery voltage drops.
• Fixed 4.2V charge voltage with ±1% accuracy.
• Low power consumption in shutdown (25µA).
• Charge current monitoring output.

Specifications:

Pinout Diagram:

Footprint Diagram:

Applications:

• Cellular Phones.
• PDAs and MP3 Players.
• Bluetooth Applications.
• Charging Docks and Cradles.

Package Contents:

• 1x LTC4054E Battery Management SMD IC SOT-23-5

LTC4054-4.2 Datasheet