Compact power management unit targets Bluetooth headsets and other portables

This post is sponsored by Texas Instruments. New from Texas Instruments, the TPS65720 is a small power management unit aimed at Bluetooth headsets and other portable low-power consumer end products. The device contains a USB-friendly Lithium-Ion battery charger, a high-efficiency step-down converter, a low dropout linear regulator and additional supporting functions and is controlled by an I2C interface. Several settings can be customized by the use of non-volatile memory which is factory programmed. The 2.25MHz step-down converter enters a low power mode at light load for maximum efficiency across the widest possible range of load currents. For low noise applications the devices can be forced into fixed frequency PWM mode using the I2C compatible interface. The device allows the use of small inductors and capacitors to achieve a small solution size. The PS65720 provides an output current of up to 200mA on the DC-DC converter. The TPS65720 also integrates one 200mA LDO. The LDO operates with an input voltage range between 1.8V and 5.6V allowing it to be supplied from the output of the step-down converter or directly from the system voltage. The TPS65720 comes in a small 25-ball wafer chip scale package (WCSP) with 0.4mm ball pitch or a 4mm × 4mm QFN package with a 0.4mm pitch (TPS65721).