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5V/3.3V/3V 2A Step-Down, PWM, Switch-Mode DC-DC Regulators

Product Details

Key Features

Simplified Block Diagram

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Key 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/Uses

  • Distributed Power from High-Voltage Buses
  • High-Current, High-Voltage Step-Down Applications
  • Multiple-Output Buck Converter

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.

These regulators have excellent dynamic and transient response characteristics, while featuring cycle-by-cycle current limiting to protect against overcurrent faults and short-circuit output faults. They also have a wide 8V to 40V input range.

Each regulator is available in a 5-pin TO-220 package. These devices have a preset 100kHz oscillator frequency and a preset current limit of 2.6A. See the MAX724/ MAX726 data sheet for more applications information.

Simplified Block Diagram

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .