1 Features
* Wide input voltage Range: 0.9V~5.5V
* Wide Output Voltage Range: 1.8V~5.0V
* Up to 450mA Output Current
* 400KHz Typical Switching Frequency
* 7.5μA Low Quiescent Supply Current
* High Efficiency up to 93%
* No External Diode or FETs Needed
* Over Current Protection
2 Applications
* Cellular Phones
* LCD Bias Supplies
* Portable Applications
* Wireless Mouse/Keyboard
3 Description
The MX5701 is a compact, PFMmode, andstep-up DC-DC converter with lowquiescentcurrent, low-noise boost convertersareintended for low-voltage systems that oftenneed a locally generated high voltage. Theinternal synchronous rectifier reduces cost andPCB space by eliminating the needfor anexternal Schottky diode. The duty cyclefactoris automatically switched according totheloadcurrent.The start-up voltage is guaranteedbelow 1V.The APW7079 is suitable for portablebattery-powered applications. Consuminglowquiescent current and an optimizedcontrolscheme allows the device to operateat veryhigh efficiency over the entire loadcurrentrange.