Switching Power Manager With USB On-the-Go + Triple Step-Down DC/DCs

The LTC3576 LTC3576-1 are highly integrated power management and Battery Charger ICs for Li-Ion/Polymer battery applications. They each include a high ef ciency, bidirectional switching PowerPath manager with auto- matic load prioritization, a Battery Charger an ideal Diode a controller for an external high voltage Switching Regulator and three general purpose Step-down Switching Regulators with I 2C adjustable output voltages. The internal switch- ing Regulators automatically limit input current for USB compatibility and CAN also generate 5V at 500mA for USB on-the-go applications when powered from the battery. Both the USB and external Switching Regulator power paths feature Bat-Track optimized charging to provide maximum power to the application from supplies as high as 38V. An overvoltage circuit protects the LTC3576 LTC3576-1 from damage due to high voltage on the VBUS or WALL pins with just two external components. The LTC3576 LTC3576-1 are available in a low pro le 38-pin (4mm 6mm 0.75mm) QFN package. By Linear Technology Corporation