MAX25660

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Automotive Low-Noise Synchronous Buck-Boost Converter

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产品技术资料帮助

ADI公司所提供的资料均视为准确、可靠。但本公司不为用户在应用过程中侵犯任何专利权或第三方权利承担任何责任。技术指标的修改不再另行通知。本公司既没有含蓄的允许，也不允许借用ADI公司的专利或专利权的名义。本文出现的商标和注册商标所有权分别属于相应的公司。
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概述

  • Meets Stringent Automotive Quality and Reliability Requirements
    • 3.6V to 36V Operating Input Voltage Range Allows Operation in Cold-Crank Conditions
    • Tolerates Input Transients up to 42V
    • Low Audible Noise for 6A Load Transients
    • 9A or 10.8A Typical Input Current Limit
    • Loop Bandwidth Adjustment for Fast Transients
    • -40°C to +125°C Grade 1 Automotive Temperature Range
  • AEC-Q100 Qualified High Integration and Thermally Enhanced Package Reduces BOM Cost and Board Space
    • 2.1MHz/400kHz Switching Frequency Options
    • Thermally Enhanced, 22-Pin FC2QFN Package
    • 5μA Maximum Shutdown Current
  • Protection Features Improve System Reliability
    • Supply Undervoltage Lockout and Thermal Protection

    The MAX25660 is a small, synchronous, buck-boost converter with integrated H-bridge switches. This IC provides a fixed-output regulation voltage and an externally adjustable output voltage in the 2.75V to 14V range with an input voltage above, below, or equal to the output regulation voltage. The MAX25660AFFA has a 9A (typ) input current limit, while the MAX25660AFFB has a 10.8A (typ) input current limit. Both versions can support continuous load currents up to 6A, which depends on the input-to-output voltage ratio and operating frequency. It also has a wide input voltage range of 3.6V to 36V. The MAX25660 features automatic loop bandwidth adjustment that automatically changes the loop bandwidth, which depends on the operating mode. This allows for a very fast transient response time when in Buck mode, which reduces audible noise caused by large changes in the load.

    The MAX25660 has two switching frequency options: 2.1MHz and 400kHz. The 2.1MHz high switching frequency allows for small external components and reduced output ripple, and guarantees no AM band interference, while the 400kHz switching frequency offers better efficiency and relieves the power consumption concern. The IC also includes spreadspectrum frequency modulation to minimize electromagnetic interference (EMI).

    The MAX25660 features a power-good (PGOOD) indicator, undervoltage lockout, overvoltage protection, cycle-by-cycle current limit, and thermal shutdown. The IC is available in a small, 4.25mm x 4.25mm x 0.75mm, 22-pin FC2QFN package.

    APPLICATIONS

    • Display Applications
    • Tail-Light and Front-Light Applications
    • Point-of-Load Power Supplies
MAX25660
Automotive Low-Noise Synchronous Buck-Boost Converter
MAX25660 Simple Block Diagram
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参考资料

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技术文章 2

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评估套件

eval board
schematic 1
schematic 2
schematic 3
MAX25660评估板

MAX25660 评估套件

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特性和优点

  • 集成功率场效应管的降压-升压转换器
  • 降压、降压-升压和升压区域之间的无缝过渡
  • 4.5V 至 36V 输入电源范围
  • 7V 输出，高达 5A 的输出电流
  • 限流和断续模式
  • 输出使能/低功耗模式
  • PGOOD 电压监视器输出

产品详情

MAX25660评估套件(EV kit)是完全组装并经过测试的应用电路，可简化MAX25660 400kHz和2.1MHz、36V降压-升压转换器的评估。所有安装的组件均符合汽车标准。

该 EV 套件标配已安装 400kHz 选配。通过更换电路板上的几个元件，也可以使用 2.1MHz 选项。
MAX25660评估板
MAX25660 评估套件
MAX25660EVKIT Board Photo Angle View MAX25660EVKIT Board Photo Top View MAX25660EVKIT Board Photo Bottom View

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