Overview

Features and Benefits

  • Multiple Functions for Small Size
    • Synchronous Boost Converter
      • 3.8V to 5.25V Output in 50mV Steps
      • 500mA and 1AOutput Versions
    • 3V to 4V Operating Supply Voltage
    • True Output Shutdown
    • 2.2MHz Operation for the MAX20471, MAX20472
    • 2.0MHz Operation for the MAX20472B
    • Open-Drain Reset Output Pin (Active-Low RESET)
    • Spread-Spectrum Enable Pin (SSEN)
  • High Precision
    • ±1.5% Output-Voltage Accuracy
    • 93V ±2% Undervoltage Monitoring
    • 107V ±2% Overvoltage Monitoring
    • Good Load-Transient Performance
    • Robust for the Automotive Environment
      • Current-Mode, Forced-PWM, and Skip Operation
      • Overtemperature and Short-Circuit Protection
      • 12-Pin (3mm × 3mm) TDFN
      • 12-Pin (3mm × 3mm) SWTDFN
      • 8-Pin (0.150”) SOIC (MAX20471 Only)
      • -40°C to +125°C Automotive Temperature Range

    Product Details

    The MAX20471, MAX20472, and MAX20472B are high-efficiency low-voltage DC-DC converters that boost a 3.0V to 4.0V input supply to between 3.8V and 5.25V (factory-configurable) at 500mA or 1A. The boost converters achieve ±1.5% output error over load, line, and temperature range.

    The devices feature a 2.2MHz (2.0MHz for MAX20472B) fixed-frequency PWM mode for better noise immunity and load-transient response, and a pulse-frequency modulation mode (skip) for increased efficiency during light-load operation. The 2.2MHz/2.0MHz frequency operation allows for the use of all ceramic capacitors and minimizes external components. The programmable spread-spectrum frequency modulation minimizes radiated electromagnetic emissions. Integrated low RDS(ON) switches improve efficiency at heavy loads, which make the layout a much simpler task with respect to discrete solutions.

    Other features include true shutdown, soft-start, overcurrent, and overtemperature protections.

    Applications

    • Automotive CAN Transceivers
    • Automotive Point of Load

    Product Categories

    Product Lifecycle icon-recommended Production

    At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

    Evaluation Kits (2)

    Tools & Simulations

    EE-Sim® DC-DC Tool

    The EE-Sim DC-DC Converter Tool uses your requirements to quickly create a complete power design including a schematic, BOM with commercially available parts, and time and frequency domain simulations. Your customized schematic can be downloaded for further analysis in the standalone EE-Sim OASIS Simulator , featuring SIMPLIS and SIMetrix SPICE engines.

    EESim-Pdp-Spotlight

    Design Resources

    ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

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