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MAX17681 - Iso-Buck DC-DC Converter

General Description

The MAX17681 is a high-voltage, high-efficiency, isobuck DC-DC converter designed to provide isolated power up to 3W.

The device operates over a wide 4.5V to 42V input and uses primary-side feedback to regulate the output voltage.

The MAX17681 uses peak-current-mode control.

Key Features

  • Reduces External Components and Total Cost.
  • No Opto-Coupler.
  • Synchronous Primary Operation.
  • All-Ceramic Capacitors, Compact Layout.
  • Reduces Number of DC-DC Regulators to Stock.
  • Wide 4.5V to 42V Input.
  • 0.9V to 0.96 x VIN Primary Output Voltage.
  • Delivers Up to 3W Output Power.
  • Reduces Power Dissipation.
  • Peak Efficiency > 90%.
  • 0.9μA (typ) Shutdown Current.
  • Operates Reliably in Ad.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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MAX17681 4.5V to 42V Input, High-Efficiency, Iso-Buck DC-DC Converter General Description The MAX17681 is a high-voltage, high-efficiency, isobuck DC-DC converter designed to provide isolated power up to 3W. The device operates over a wide 4.5V to 42V input and uses primary-side feedback to regulate the output voltage. The MAX17681 uses peak-current-mode control. The low-resistance, on-chip MOSFETs ensure high efficiency at full load while simplifying the PCB layout. The device is available in a compact 10-pin (3mm x 2mm) TDFN package. Simulation models are available. Applications ●● Isolated Fieldbus Interfaces ●● PLC I/O Modules ●● Smart Meters ●● Isolated Power Supplies in Medical Equipment ●● Floating Power Supply Generation Ordering Information appears at end of data sheet.