LTC4099

LTC4099 I2C Controlled USB Power Manager/Charger with Overvoltage Protection Features n Switching Regulator with Bat-Track™ Adaptive Output Control Makes Optimal Use of Limited Input Power n I2C Port for Optimal System Performance and Status Information n Input Overvoltage Protection n Bat-Track Control of External Step-Down Switching Regulator Maximizes Efficiency from Automotive and Other High Voltage Sources n Instant-On Operation with Low Battery n Optional Overtemperature Battery Conditioner Improves High Temperature Battery Safety Margin n Ideal Diode Seamlessly Connects Battery When Input Power is Limited or Unavailable n Full-Featured Li-Ion/Polymer Battery Charger n 1.5A Maximum Charge Current with Thermal Limiting n Slew Control Reduces Switching EMI n 20-Lead 3mm × 4mm × 0.75mm QFN Package Applications n Media Players n Portable Navigation Devices n Smart Phones n Industrial Handhelds n Portable Medical Instruments Description The LTC®4099 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. The LTC4099 automatically limits its input current for USB compatibility. For automotive and other high voltage applications, the LTC4099 interfaces with an external switching regulator. Both the USB input and the auxiliary input controller feature Bat-Track optimized charging to provide maximum ...