Analog Devices MAX17687

Description

The Rainier series of isolated DC-DC products enable small, efficient solutions with a lower BOM. The MAX17687 is a high-voltage, high-efficiency, iso-buck DC-DC converter designed to provide isolated power up to 10W. The device operates over a wide 4.5V to 60V input voltage range and uses primary-side feedback to regulate the output voltage. It delivers primary peak current up to 3.2A and regulates primary output voltage to within ±1.2%.The device features peak-current-mode control with pulse-width modulation (PWM) scheme. The low-resistance, on-chip MOSFETs ensure high efficiency at full load and simplify the layout.A programmable soft-start feature allows users to reduce input inrush current. The device also incorporates an output enable/undervoltage lockout pin (EN/UVLO) that allows the user to turn on the part at the desired input-voltage level. An open-drain RESET pin provides a delayed power-good signal to the system upon achieving successful regulation of the primary output voltage.The device operates from -40°C to +125°C and is available in a compact 20-pin (4mm x 4mm) TQFN package.Simulation models are available.

Features

• Eliminates External Components and Reduces TotalCost
• Synchronous Primary Operation for High Efficiencyand Reduced Cost
• All-Ceramic Capacitors, Ultra-Compact Layout
• Supports Numerous Isolated DC-DC Applications
• Wide 4.5V to 60V Input Voltage Range
• Delivers up to 3.2A Peak Current
• 100kHz to 500kHz Adjustable Frequency with External Synchronization
• Available in a 20-Pin, 4mm x 4mm TQFN Package
• Reduces Power Dissipation
• Peak Efficiency > 90%
• Shutdown Current = 2.8μA (typ)
• Operates Reliably in Adverse Industrial Environments
• Hiccup-Mode Current Limit, Sink Current Limit, andAuto-Retry Startup
• Programmable EN/UVLO Threshold
• Adjustable Soft-Start
• -40°C to +125°C Ambient Operating TemperatureRange
• -40°C to +150°C Junction Temperature Range

Typical applications

• Floating Power Supply Generation, Isolated Power Supplies
• Communication Hub in Smart Meters, Industrial Process Control
• Isolated Power Supplies in Medical Equipment

More information

• Datasheet
• IC product information