LTC4068EDD-4.2#PBF

The LTC4068EDD-4.2#PBF is a complete constant-current/constant-voltage linear charger for single-cell lithium-ion batteries, designed by Analog Devices. It is ideally suited for portable applications due to its DFN package and low external component count, working within USB power specifications.

Key features include a programmable charge current up to 950mA and a preset charge voltage of 4.2V with ±1% accuracy. The device incorporates thermal regulation to maximize charge rate without overheating and automatically recharges the battery. It terminates the charge cycle when the charge current drops below a programmed threshold after reaching the final float voltage.

This charger IC requires no external MOSFET, sense resistor, or blocking diode. It includes features such as charge current monitor output, undervoltage lockout, automatic recharge, and status pins for charge termination and input voltage presence. The LTC4068EDD-4.2#PBF is available in a low-profile 8-DFN package measuring 3mm x 3mm x 0.75mm, making it suitable for space-constrained designs.

Applications include cellular telephones, PDAs, MP3 players, and Bluetooth devices. The device operates within a temperature range of -40°C to 85°C and mounts via surface mount technology.