30V Internal Switch LCD Bias Supply

The MAX1605 boost converter contains a 0.5A internal switch in a tiny 6-pin SOT23 package. The IC operates from a +2.4V to +5.5V supply voltage, but can boost battery voltages as low as 0.8V up to 30V at the output.

The MAX1605 uses a unique control scheme providing the highest efficiency over a wide range of load conditions. An internal 0.5A MOSFET reduces external component count, and a high switching frequency (up to 500kHz) allows for tiny surface-mount components. The current limit can be set to 500mA, 250mA, or 125mA, allowing the user to reduce the output ripple and component size in low-current applications.

Additional features include a low quiescent supply current and a shutdown mode to save power. The MAX1605 is ideal for small LCD panels with low current requirements, but can also be used in other applications. A MAX1605EVKIT evaluation kit (EV kit) is available to help speed up design time.

Applications

* Cell Phones/Cordless Phones * Handy Terminals * LCD Bias Generators * Organizers * Palmtop Computers * PDAs and Other Handheld Devices

* Adjustable Output Voltage up to 30V

* 20mA at 20V from a Single Li+ Battery

* 88% Efficiency

* Up to 500kHz Switching Frequency

* Selectable Inductor Current Limit (125mA, 250mA, or 500mA)

* 18µA Operating Supply Current

* 0.1µA Shutdown Current

* Avaiable in Two Small Packages

* 6-Pin TDFN

* 6-Pin SOT23