General Description

The MAX1800 provides a complete power-supply solution for digital still cameras and video cameras. The device integrates a high-efficiency main step-up DC-DC converter, three auxiliary step-up controllers, and an uncommitted gain block that drives an external P-channel MOSFET for a linear regulator. The MAX1800 is targeted for applications that use either two or three primary cells or a single lithium-ion (Li+) battery.

Features

? +0.7V to +5.5V Input Voltage Range

? Main DC-DC Converter

95 Efficiency

+2.7V to +5.5V Adjustable Output Voltage

1.5A Load Current

? Uncommitted Gain Block for Linear Regulator

? Three Independent Auxiliary Step-Up Controllers Adjustable Maximum Duty Cycle

? Oscillator and Reference Outputs to Drive External Slave Controllers (MAX1801)

? Power-Ready Output

? Up to 1MHz Switching Frequency

? 1μA Supply Current in Shutdown Mode

? Internal Soft-Start Control

? Overload Protection for all DC-DC Converters

? Compact 32-Pin TQFP Package (5mm x 5mm body)

Applications

Digital Still Cameras

PDAs

Digital Video Cameras

DVD Players

Hand-Held Devices

Internet Access Tablets