MAX20472

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


Please check latest availability status for a specific part variant.

Description

The MAX20471 and MAX20472 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, 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.
MAX20471, MAX20472: Functional Diagram MAX20471, MAX20472:Functional Diagram Enlarge+

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

    • Automotive CAN Transceivers
    • Automotive Point of Load

    See parametric specs for Step-Up Switching Regulators (102)


    Part NumberVIN
    (V)
    VIN
    (V)
    VOUT1
    (V)
    IOUT1
    (A)
    (min)(max)(min)(max)
    MAX20471 344.50.5
    MAX20472 1

    Pricing Notes:
    This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

    MAX20472EVKIT: Evaluation Kit for the MAX20472
    MAX20471EVKIT: Evaluation Kit for the MAX20471

    Tools & Models

  • EE-Sim: Design & Simulate MAX20472
  • MAX20472 SIMPLIS Schematic
  • Request Reliability Report for: MAX20472 
    Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

    Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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