LTC4064EMSE#PBF

LTC4064 is a standalone linear charger optimized for prolonging the life of 1-cell Li-ion batteries in battery backup applications. By charging to a float voltage of 4V instead of 4.2V or 4.1V, this device decelerates the aging process and capacity degradation when the battery is unused for long periods of time but must be in a ready state. An external capacitor programs a safety timer to terminate the charge cycle while the charge current is set externally with a single resistor. When the input supply is removed, it automatically enters a low current sleep mode, dropping the battery drain current to less than 3µA. Additional safety features designed to maximize battery lifetime and reliability include NTC temperature sensing and low battery charge conditioning (trickle charging). It is used in applications such as file servers, RAID systems, storage products, Li-ion battery back-up.

• Automatic recharge, programmable charge termination timer
• No MOSFET, sense resistor or blocking diode required
• Thermistor input for temperature qualified charging
• Programmable charge current with 7% accuracy
• C/10 charge current detection output, charges directly from USB port
• Charge current monitor useful for gas gauging
• VCC supply voltage from 4.25V to 6.5V
• VCC supply current is 1mA typical at (TA = 25°C, VCC = 5V)
• Operating temperature range from -40°C to 85°C
• Package style is 10-lead plastic MSOP

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party