The LTC4090EDJC#PBF is an USB Power Manager with 2A high voltage bat-track buck regulator. 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. The LTC4090 also accommodate high voltage power supplies, such as 12V AC-DC wall adapters, FireWire or automotive power. The LTC4090 provides a Bat-Track adaptive output that tracks the battery voltage for high efficiency charging from the high voltage input. The charge current is programmable and an end-of-charge status output (CHRG) indicates full charge. Also featured are programmable total charge time, an NTC thermistor input used to monitor battery temperature while charging and automatic recharging of the battery.
Seamless transition between power sources (Li-ion battery, USB and 6 to 38V external supply)
2A Output high voltage buck regulator with Bat-Track? adaptive output control
Load dependent charging guarantees accurate USB input current compliance
Full featured Li-ion battery charger
1.5A Maximum charge current with thermal limiting
NTC thermistor input for temperature qualified charging
(EN)
