General Description

The MAX774/MAX775/MAX776 inverting switching regulators deliver high efficiency over three decades of load current. A unique current-limited, pulse-frequency-modulated (PFM) control scheme provides the benefits of pulse-width modulation (high efficiency with heavy loads), while using less than 100µA of supply current (vs. 2mA to 10mA for PWM converters). The result is high efficiency over a wide range of loads.

Features

♦ 85% Efficiency for 5mA to 1A Load Currents

♦ Up to 5W Output Power

♦ 100µA Max Supply Current

♦ 5µA Max Shutdown Current

♦ 3V to 16.5V Input Range

♦ -5V (MAX774), -12V (MAX775), -15V (MAX776), or Adjustable Output Voltage

♦ Current-Limited PFM Control Scheme

♦ 300kHz Switching Frequency

Applications

    LCD-Bias Generators

    High-Efficiency DC-DC Converters

    Battery-Powered Applications

    Data Communicators