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Analog Devices / Maxim Integrated MAX17761 Synchronous Step-Down DC-DC Converter

Analog Devices MAX17761 Synchronous Step-Down DC-DC Converter is a high-efficiency, high-voltage converter with integrated MOSFETs. The converter operates over a 4.5V to 76V input and delivers up to a 1A current. The output voltage is programmable from 0.8V to 90% of VIN. The MAX17761 has a feedback voltage regulation accuracy of over -40°C to +125°C is ±1.5%. The device features a peak-current-mode control architecture and can be operated in either the pulse-width modulation (PWM) or pulse-frequency modulation (PFM) control schemes. The Analog Devices MAX17761 is housed in a 12-pin (3x3mm) TDFN package.

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 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

Block Diagram

Block Diagram - Analog Devices / Maxim Integrated MAX17761 Synchronous Step-Down DC-DC Converter

Evaluation Kit

Analog Devices / Maxim Integrated MAX17761EVKIT 5V Output Evaluation Kit

Used to evaluate the MAX17761 synchronous step-down DC-DC converter.

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Published: 2017-12-06 | Updated: 2023-04-11