LTC4099EUDC#PBF

LTC4099 is an I²C controlled high efficiency USB PowerPath™ controller and full-featured Li-ion/polymer battery charger. It seamlessly manages power distribution from multiple sources including USB, a wall adapter and a Li-ion/polymer battery. It automatically limits its input current for USB compatibility. For automotive and other high voltage applications, this device interfaces with an external switching regulator. Both the USB input and the auxiliary input controller feature Bat-Track optimized charging to provide maximum power to the application and reduced heat in high power density applications. The I²C port allows digital control of important application parameters including input current limit, charge current and float voltage. Several status bits can also be read back via I²C. It is used in applications such as media players, portable navigation devices, smart phones, industrial handhelds, portable medical instruments etc.

• Input overvoltage protection
• Instant-on operation with low battery
• Ideal diode seamlessly connects battery when input power is limited or unavailable
• 1.5A maximum charge current with thermal limiting
• Slew control reduces switching EMI
• Input supply voltage from 4.35V to 5.5V
• Input quiescent current is 6mA typical at (100mA mode, TA = 25°C)
• Switching frequency is 2.25MHz typical at (TA = 25°C, VBUS = 5V)
• Operating temperature range from -40°C to 85°C
• Package style is 20-lead plastic QFN

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