ANALOG DEVICES LTC4090EDJC#PBF USB Interface, USB Power Manager, 4.35 V, 5.5 V, DFN-EP, 22 Pins

LTC4090 is a USB power manager plus high voltage Li-ion/polymer battery chargers. 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 accommodates high voltage power supplies, such as 12V AC/DC wall adapters, Firewire, or automotive power. It provides a Bat-Track 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 (CHRG) indicates full charge. It is used in applications such as HDD-based media players, personal navigation devices, other USB-based handheld products, automotive accessories etc.

• USB input supply voltage from 4.35V to 5.5V
• On-resistance VIN to VOUT is 0.215W typ at (IOUT = 80mA, TA = 25°C)
• Input bias current is 1mA max at (IBAT = 0, TA = 25°C)
• Maximum input current limit is 2.4A typ at (TA = 25°C)
• Load dependent charging from USB input guarantees current compliance
• Full featured Li-ion battery charger
• NTC thermistor input for temperature qualified charging
• Switch VCESAT is 500mV typ at (SW = 2A, TA = 25°C)
• Operating temperature range from -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