General Description

The MAX783 is a system-engineered power-supply controller for notebook computers or similar battery-powered equipment. It provides two high-performance step-down (buck) pulsewidth modulators (PWMs) for +3.3V/+5V and dual PCMCIA VPP outputs powered by an integral flyback winding controller. Other functions include dual, low-dropout, micropower linear regulators for CMOS/RTC back up, and two precision lowbattery-detection comparators.

Features

♦ Dual PWM Buck Controllers (+3.3V and +5V)

♦ Dual PCMCIA VPP Outputs (0V/3.3V/5V/12V)

♦ Two Precision Comparators or Level Translators

♦ Power-Ready Status Output (RDY5)

♦ 95% Efficiency

♦ Optimized for 6-Cell Applications

♦ 420µA Quiescent Current;

    70µA in Standby (linear regulators alive)

    25µA Shutdown Current

♦ 5.5V to 30V Input Range

♦ Small SSOP Package

♦ Fixed Output Voltages Available:

    3.3V (standard)

    3.45V (High-Speed Pentium™)

    3.6V (PowerPC™)

Applications

    Notebook Computers

    Portable Data Terminals

    Communicating Computers

    Pen-Entry Systems