Synchronous rectification: Up to 95%efficiency

 Single inductor

 Fixed frequency operation with battery voltages above, below or equal to the output Quiescent current??300μA

 Up to 600mA continuous output current

 1.8V to 5.5V input and output voltage range

 Programmable oscillator frequency from 350kHz to 1.5MHz

 No Shottky Diodes required

 VOUT disconnected from VIN during shutdown

 Shutdown current: IQ??1μA

 Package: small thermally enhanced 10-pin MSOP Application

 Digital cameras

 Palmtop computers

 MP3/MP4 players

 Handheld instruments
Description
The HX8001 is high efficiency, fixed frequency, Buck-Boost DC/DC converters which operates from input voltages above,below or equal to the output voltage. The devices are suitable for single lithium-ion, multicell alkaline or NiMH applications where the output voltage is within the battery voltage range.
The switching frequencies up to 1.5 MHz could be fixed by employing an external resistor, and the oscillator could be synchronized to an external clock. the quiescent current is 300 μA, and this feature maximizing the battery life in portable applications.
Other features include a 1 μA shutdown,soft-start control, thermal shutdown and
current limit. The HX8001 converters are available in the 10-pin thermally enhanced