LTC4089EDJC#TRPBF

LTC4089 is an USB power manager plus high voltage Li-Ion battery charger. This device controls the total current used by the USB peripheral for operation and battery charging. Battery charge current is automatically reduced such that the sum of the load current and the charge current does not exceed the programmed input current limit. It also accommodate high voltage power supplies, such as 12V AC-DC wall adapters, Firewire, or automotive power. It provides an adaptive output that tracks the battery voltage for high efficiency charging from the high voltage input. It provides a fixed 5V output from the high voltage input to charge single cell Li-Ion batteries. The charge current is programmable and an end-of-charge status output indicates full charge. constant-current/constant-voltage operation with thermal feedback to maximize charging rate without risk of overheating. It is used in applications such as portable USB devices, GPS receivers, cameras, MP3 players, PDAs etc.

• Seamless transition between power sources: Li-Ion battery, USB, and 6V to 36V external supply
• Load dependent charging from USB input guarantees current compliance
• Selectable 100% or 20% current limit (e.g., 500mA/100mA) from USB input
• Preset 4.2V charge voltage with 0.8% accuracy
• C/10 charge current detection output
• NTC thermistor input for temperature qualified charging
• USB input supply voltage is 4.35V to 5.5V
• Input bias current is 1mA typical at (TA = 25°C, HVIN = 12V, BOOST = 17V)
• Operating temperature is -40°C to 85°C
• Package style is 22-lead plastic DFN

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