General Description
The MAX1802 provides a complete power-supply solution for digital still cameras and video cameras by integrating two high-efficiency step-down DC-DC converters and three auxiliary step-up controllers. This complete solution is targeted for applications that use either three to four alkaline cells or two lithium-ion (Li+) cells.

Features
♦ 2.5V to 11V Input Voltage Range
♦ Main DC-DC Controller
    94% Efficiency
    +2.7V to +5.5V Adjustable Output Voltage
    Up to 100% Duty Cycle
    Independent Shutdown
♦ Core DC-DC Converter
    94% Efficiency
    Up to 500mA Load Efficiency
    Output Voltage Adjustable Down to 1.25V
    Independent Shutdown
♦ Three Auxiliary DC-DC Controllers
    Adjustable Maximum Duty Cycle
    Independent Shutdown
♦ Power, Oscillator, and Reference Outputs to Drive
    External Slave Controllers (MAX1801)
♦ Up to 1MHz Switching Frequency
♦ 3µA Supply Current in Shutdown Mode
♦ Internal Soft-Start
♦ Overload Protection for All DC-DC Converters
♦ Compact 32-Pin TQFP Package

Applications
    Digital Still Cameras
    Digital Video Cameras
    Hand-Held Devices
    Internet Access Tablets
    PDAs
    DVD Players