General Description

The MAX787/MAX788/MAX789 are monolithic, bipolar, pulse-width modulation (PWM), switch-mode, step-down DC-DC regulators. Each is rated at 5A. Very few external components are needed for standard operation because the power switch, oscillator, feedback, and control circuitry are all on-chip. Employing a classic buck topology, these regulators perform high-current step-down functions.

Features

♦ Input Range: Up to 40V

♦ 5A On-Chip Power Switch

♦ Fixed Outputs: 5V (MAX787)

                      3.3V (MAX788)

                      3V (MAX789)

♦ 100kHz Switching Frequency

♦ Excellent Dynamic Characteristics

♦ Few External Components

♦ 8.5mA Quiescent Current

♦ TO-220 Package

Applications

  Distributed Power from High-Voltage Buses

  High-Current, High-Voltage Step-Down

  Multiple-Output Buck Converter