The LTC4099 USB power manager and Li-Ion/Polymer battery charger seamlessly manages power distribution from multiple sources in portable applications. It is differentiated from other USB power managers by its bidirectional I2C port that allows the host microprocessor to control and monitor all aspects of the USB power management and battery charging processes.
The LTC4099 is a high efficiency USB power manager and Li-Ion/Polymer battery charger that seamlessly manages power distribution from multiple sources in portable applications. It features a bidirectional I2C port allowing the host microprocessor to control and monitor all aspects of USB power management and battery charging processes.
| Package Type | 20-lead ultrathin plastic QFN package |
|---|---|
| Package Dimensions | 8mm x 5mm x 0.55mm |
| Default Float Voltage | 4.1V or 4.2V |
| Safety Timer Interval Range | One to eight hours |
It keeps the output voltage approximately 300mV above the battery voltage to allow the charger to operate very efficiently.
It detects an external high voltage buck regulator and controls its output to within approximately 300mV of the battery voltage.