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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

产品详情

主要特征

简化框图

Technical Docs

数据资料 Low-Voltage Synchronous Boost Converter Jan 03, 2020

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主要特征

  • 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

    应用/用途

    描述

    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.

    简化框图

    Technical Docs

    数据资料 Low-Voltage Synchronous Boost Converter Jan 03, 2020

    支持和培训

    在Maxim的知识库中搜索技术问题的答案

    过滤搜索

    Maxim的专业工程师团队也会为您解答相应的技术问题,请访问Maxim的 支持中心