Maxim Integrated MAX17681 | Demoboard MAX17681EVKIT

Description

The MAX17681 is a high-voltage, high-efficiency, iso-buck 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.

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 Adverse Industrial Environments ◦Peak and Sink Current-Limit Protection
• ±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
• Isolated Fieldbus Interfaces
• PLC I/O Modules
• Smart Meters
• Floating Power Supply Generation

More information

• Datasheet
• IC product information