LTC4088

LTC4088 High Efficiency Battery Charger/USB Power Manager Features n Switching Regulator Makes Optimal Use of Limited Power Available from USB Port to Charge Battery and Power Application n 180mΩ Internal Ideal Diode Plus Optional External Ideal Diode Controller Seamlessly Provides Low Loss Power Path When Input Power is Limited or Unavailable n Full Featured Li-Ion/Polymer Battery Charger n VBUS Operating Range: 4.25V to 5.5V (7V Absolute Maximum—Transient) n 1.2A Maximum Input Current Limit n 1.5A Maximum Charge Current with Thermal Limiting n Bat-Track™ Adaptive Output Control n Slew Control Reduces Switching EMI n Low Profile (0.75mm) 14-Lead 4mm × 3mm DFN Package Applications n Media Players n Digital Cameras n GPS n PDAs n Smart Phones Description The LTC®4088 is a high efficiency USB PowerPath™ controller and Li-Ion/Polymer battery charger. It includes a synchronous switching input regulator, a full-featured battery charger and an ideal diode. Designed specifically for USB applications, the LTC4088’s switching regulator automatically limits its input current to either 100mA, 500mA or 1A for wall-powered applications via logic control. The switching input stage provides power to VOUT where power sharing between the application circuit and the battery charger is managed. Unlike linear PowerPath controllers, the LTC4088’s switching input stage can use nearly all of the 0.5W or 2.5W available from the USB port with minimal power dissipation. This feature allows the LTC4...