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Low-Voltage Synchronous Boost Converter

Industry's Only Automotive Synchronous Boost Converter with Up to 1A of Output Current and True Shutdown and Active-Low RESET Output

Product Details

Key Features

Technical Docs

Data Sheet Low-Voltage Synchronous Boost Converter Jan 03, 2020

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Key Features

  • Synchronous Boost Converter
    • -3.8V to 5.25V Output in 50mV Steps
    • 500mA, 1A, and 2A Output Versions
  • 3.0V to 4.0V Operating Supply Voltage
  • True Output Shutdown
  • 2.2MHz Switching Operation
  • Open-Drain Reset Output Pin (Active-Low RESET)
  • Spread-Spectrum Enable Pin (EN)
  • 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 Control, Forced-PWM, and Skip Operation
      • Overtemperature and Overcurrent Protection
      • 12-Pin (3mm × 3mm) TDFN
      • 8-Pin (0.150”) SOIC (MAX20471 Only)
      • -40°C to +125°C Automotive Temperature Range

    Applications/Uses

    Description

    The MAX20471, MAX20472, and MAX20473 are highefficiency, 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, 1A, or 2A. The boost converters achieve ±1.5% output error over load, line, and temperature ranges.

    The ICs feature a 2.2MHz fixed-frequency, forced pulse-width modulation (FPWM) mode for better noise immunity and load-transient response, as well as a pulse-frequency modulation (skip) mode for increased efficiency during light-load operation. The 2.2MHz frequency operation enables 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 of the parts include true output shutdown, soft-start ramping, overcurrent limiting, and overtemperature protection.

    Technical Docs

    Data Sheet Low-Voltage Synchronous Boost Converter Jan 03, 2020

    Support & Training

    Search our knowledge base for answers to your technical questions.

    Filtered Search

    Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .