Analog Devices MAX17681A | Demoboard MAXREFDES1167

Description

The MAX17681/MAX17681A is a high-voltage, high-efficiency, iso-buck DC-DC converter designed to provide isolated power up to 5W. The device operates over a wide 4.5V to 42V input and uses primary-side feedback to regulate the output voltage. The MAX17681/MAX17681A uses peak-current-mode control. Low-resistance, on-chip MOSFETs ensure high efficiency at full load while simplifying the PCB layout.

Features

• Reduces External Components and Total Cost
• No Optocoupler
• 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 5W Output Power
• Reduces Power Dissipation
• Peak Efficiency > 90%
• 0.9μA (typ) Shutdown Current
• Operates Reliably in Adverse Industrial Environments
• Peak and Sink Current-Limit Protection
• Robust Secondary-Side Output Overcurrent Protection (MAX17681A)
• ±1.7% Feedback Accuracy
• Programmable EN/UVLO Threshold
• Adjustable Soft-Start
• Overtemperature Protection
  • -40°C to +125°C Operation

Typical applications

• Isolated Power Supplies in Medical Equipment, Floating Power Supply Generation
• Isolated Fieldbus Interfaces, PLC I/O Modules

More information

• Datasheet
• IC product information