MAX20471

RECOMMENDED FOR NEW DESIGNS

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

Data Sheet (Rev. 16) Product Selection Table
Part Models
12
1ku List Price
Starting From $1.08
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Part Details

  • 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
    MAX20471
    Low-Voltage Synchronous Boost Converter
    MAX20471, MAX20472:Functional Diagram
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    Documentation

    Data Sheet 1

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    Tools & Simulations

    EE-Sim Power® Tools 1

    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.

    Start EE-Sim Now

    SIMPLIS Models 1

    Evaluation Kits

    MAX20471EVKIT

    Evaluation Kit for the MAX20471

    Buy Now View Details

    Features and Benefits

    • 3.0V to 4.0V Operating Supply Voltage
    • 3.8V to 5.25V Fixed Output
    • 500mA Output Version Populated; Compatible with 1A and 2A Output Versions
    • 2.2MHz Operation
    • Feedback Injection Point to Test Stability
    • Robust for the Automotive Environment
      • Current Mode, Forced-PWM and Skip Operation
      • Overtemperature and Short-Circuit Protection
      • -40°C to +125°C Operating Range
    • Proven PCB Layout
    • Fully Assembled and Tested

    Product Details

    The MAX20471 evaluation kit demonstrates the performance of the MAX20471, which is part of the MAX20471–MAX20473 series of high-efficiency, low-voltage DC-DC converters. The converter ICs boost a 3.0V to 4.0V input supply to between 3.8V and 5.25V at up to 500mA. The boost converters achieve ±1.5% output error over load, line, and temperature range.

    The IC features a 2.2MHz fixed-frequency forced-PWM (FPWM) 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 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 and make the layout a much simpler task with respect to discrete solutions.

    The regulator includes True Shutdown™, soft-start, overcurrent, and overtemperature protections.

    Applications

    • Automotive CAN Transceivers
    • Automotive Point of Load

    MAX20472EVKIT

    Evaluation Kit for the MAX20472/MAX20472B

    Buy Now View Details

    Features and Benefits

    • 3.0V to 4.0V Operating Supply Voltage
    • 3.8V to 5.25V Fixed Output
    • 1A Output Version Populated; Compatible with 500mA and 2A Output Versions
    • 2.2MHz Operation for the MAX20472
    • 2.0MHz Operation for the MAX20472B
    • Feedback Injection Point to Test Stability
    • Robust for the Automotive Environment
      • Current Mode, Forced-PWM and Skip Operation
      • Overtemperature and Short-Circuit Protection
      • -40°C to +125°C Operating Range
    • Proven PCB Layout
    • Fully Assembled and Tested

    Product Details

    The MAX20472 evaluation kit demonstrates the performance of the MAX20472 and MAX20472B, which is part of the MAX2047x series of high-efficiency, low-voltage DC-DC converters. The converter ICs boost a 3.0V to 4.0V input supply to between 3.8V and 5.25V at up to 1A. The boost converters achieve ±1.5% output error over load, line, and temperature range.

    The IC features a 2.2MHz (2.0MHz for the MAX20472B) fixed-frequency forced-PWM (FPWM) 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 or 2.0MHz 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 and make the layout a much simpler task with respect to discrete solutions.

    The regulator includes True Shutdown™, soft-start, overcurrent, and overtemperature protections.

    Applications

    • Automotive CAN Transceivers
    • Automotive Point of Load
    MAX20471EVKIT
    Evaluation Kit for the MAX20471
    MAX20472EVKIT
    Evaluation Kit for the MAX20472/MAX20472B

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