MX5701（DC-DC升压IC）

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.