General Description

The MAX761/MAX762 step-up switching regulators provide high efficiency over a wide range of load currents, delivering up to 150mA. A unique, current-limited pulse-frequency-modulated (PFM) control scheme gives the devices the benefits of pulse-width-modulated (PWM) converters (high efficiency with heavy loads), while using less than 110µA of supply current (vs. 2mA to 10mA for PWM converters). The result is high efficiency over a wide range of loads.

Features

♦ High Efficiency for a Wide Range of Load Currents

♦ 12V/150mA Flash Memory Programming Supply

♦ 110µA Max Supply Current

♦ 5µA Max Shutdown Supply Current

♦ 2V to 16.5V Input Voltage Range

♦ 12V (MAX761), 15V (MAX762) or Adjustable Output

♦ Current-Limited PFM Control Scheme

♦ 300kHz Switching Frequency

♦ Internal, 1A, N-Channel Power FET

♦ LBI/LBO Low-Battery Comparator

Applications

    Flash Memory Programming

    PCMCIA Cards

    Battery-Powered Applications

    High-Efficiency DC-DC Converters