MAX770CSA Datasheet PDF - Maxim Integrated

●General Description

●The MAX770–MAX773 step-up switching controllers provide 90% efficiency over a 10mA to 1A load. A unique current-limited pulse-frequency-modulation (PFM) control scheme gives these devices the benefits of pulse-width-modulation (PWM) converters (high efficiency at heavy loads), while using less than 110µA of supply current (vs. 2mA to 10mA for PWM converters).

●Features

●♦ 90% Efficiency for 10mA to 1A Load Currents

●♦ Up to 15W Output Power

●♦ 110µA Max Supply Current

●♦ 5µA Max Shutdown Current

●♦ 2V to 16.5V Input Range (MAX770/MAX771/MAX772)

●♦ Internal Shunt Regulator for High Input Voltages (MAX773)

●♦ Preset or Adjustable Output Voltages

●   MAX770: 5V or Adjustable

●   MAX771: 12V or Adjustable

●   MAX772: 15V or Adjustable

●   MAX773: 5V, 12V, 15V, or Adjustable

●♦ Current-Limited PFM Control Scheme

●♦ 300kHz Switching Frequency

●Applications

●Palmtops/Handy-Terminals

●High-Efficiency DC-DC Converters

●Battery-Powered Applications

●Positive LCD-Bias Generators

●Portable Communicators

●Flash Memory Programmers