| Description & Applications | Battery Charger and Step-Down Converter for Portable Applications The AAT2556 is a fully integrated 500mA battery charger plus a 250mA step-down converter. The input voltage range is 4V to 6.5V for the battery charger and 2.7V to 5.5V for the step-down converter.It offers an integrated pass device, reverse blocking protection,high current accuracy and voltage regulation. The charging current is programmable. In addition to standard features, the device offers over-voltage, current limit,and thermal protection.Applications： Bluetooth Headsets Cellular Phones Handheld Instruments MP3 and Portable Music Players PDAs and Handheld Computers Portable Media Players |