General Description
The MAX17761, high-efficiency, high-voltage, synchronous step-down DC-DC converter with integrated MOSFETs operates over a 4.5V to 76V input. The converter can deliver up to 1A current. Output voltage is programmable from 0.8V up to 90% of VIN. The feedback voltage regulation accuracy over -40°C to +125°C is ±1.5%.

Benefits and Features
● Reduces External Components and Total Cost
    • No Schottky—Synchronous Operation
    • Internal Compensation Components
    • All-Ceramic Capacitors, Compact Layout
● Reduces Number of DC-DC Regulators to Stock
    • Wide 4.5V to 76V Input
    • Output Adjustable from 0.8V up to 90% of VIN
    • Delivers up to 1A Over Temperature
    • 200kHz to 600kHz Adjustable Frequency with External Clock Synchronization
    • Programmable Current Limit
● Reduces Power Dissipation
    • Peak Efficiency > 90%
    • PFM Mode Enables Enhanced Light-Load Efficiency
    • Auxiliary Bootstrap LDO for Improved Efficiency
    • 5μA Shutdown Current
● Operates Reliably in Adverse Industrial Environments
    • Adjustable Soft-Start and Prebiased Power-Up
    • Built-in Output-Voltage Monitoring with RESET
    • Programmable EN/UVLO Threshold
    • Monotonic Startup into Prebiased Load
    • Overtemperature Protection
    • High Industrial -40°C to +125°C Ambient Operating Temperature Range/-40°C to +150°C Junction Temperature Range

Applications
● Industrial Control Power Supplies
● General-Purpose Point-of-Load
● Distributed Supply Regulation
● Basestation Power Supplies
● Wall Transformer Regulation
● High-Voltage, Single-Board Systems