ACT6907

Data Sheet Rev 0, 5/2006 ACT6907 1.6MHz, 600mA Synchronous Step Down Converter in SOT23-5 FEATURES  High Efficiency - Up to 95%  Very Low 24µA Quiescent Current  Guaranteed 600mA Output Current  1.6MHz Constant Frequency Operation  Internal Synchronous Rectifier Eliminates Schottky Diode  Adjustable Output Voltages From 0.6V to VIN  Fixed Output Voltage Options Available  100% Duty Cycle Low-Dropout Operation  0.1µA Shutdown Current  Tiny SOT23-5 Package APPLICATIONS  Blue Tooth Headsets  Portable Audio Players  Mobile Phones  Wireless and DSL Modems  Digital Still Cameras  Portable Instruments GENERAL DESCRIPTION The ACT6907 is a fixed-frequency currentmode synchronous PWM step down converter that is capable of delivering 600mA of output current while achieving peak efficiency of 95%. Under light load conditions, the ACT6907 operates in a proprietary pulse skipping mode that consumes just 24µA of supply current, maximizing battery life in portable applications. The ACT6907 operates with a fixed frequency of 1.6MHz, minimizing noise in noise-sensitive applications and allowing the use of small external components. The ACT6907 is an ideal solution for applications powered by Li-Ion batteries or other portable applications that require small board space. The ACT6907 is available in a variety of fixed output voltage options, 1.5V, 1.8V, 2.5V, 2.7V, 2.8V, and 3.3V, and is also available in an adjustable output voltage version capable of generating output volta...