General Description

The MAX727/MAX728/MAX729 are monolithic, bipolar, pulse-width modulation (PWM), switch-mode, step-down DC-DC regulators. Each is rated at 2A. 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

♦ 2A On-Chip Power Switch

♦ Fixed Outputs: 5V (MAX727)

   3.3V (MAX728)

   3V (MAX729)

♦ 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 Applications

   Multiple-Output Buck Converter