GENERAL DESCRIPTION

The ML4863 is a flyback controller designed for use in multi-cell battery powered systems such as PDAs and notebook computers. The flyback topology is ideal for systems where the battery voltage can be either above or below the output voltage, and where multiple output voltages are required.

FEATURES

■ Variable frequency current mode control and synchronous rectification for high efficiency

■ Minimum external components

■ Guaranteed start-up and operation over a wide input voltage range (3.15V to 15V)

■ High frequency operation (>200kHz) minimizes the size of the magnetics

■ Flyback topology allows multiple outputs in addition to the regulated 5V

■ Built-in overvoltage and current limit protection