MAX8643

3A、2MHz、降压型调节器,内置开关

尺寸最小、效率最高的3A降压型调节器,工作频率高达2.4MHz


点击查看特定型号的库存状况。

说明

MAX8643是一款高效开关稳压器,在0.6V至(0.9 × VIN)输出范围内可提供最大3A负载电流。器件工作电压为2.35V至3.6V,非常适合负载点(point-of-load)和后稳压应用。在整个负载、输入电压和温度变化范围内,器件输出电压误差低于±1%。

MAX8643采用固定频率PWM工作模式,开关频率可通过外部电阻在500kHz至2MHz范围内设置。高工作频率允许全陶瓷电容设计,同时也允许采用小尺寸外部元件。

片内低导通电阻nMOS保证在较重负载下提供高效率,并使电感值最小。相对于分立元件解决方案,该器件的布局要简单得多。便利的电路布局和引脚配置保证器件在新设计应用中的一次通过率。

MAX8643内部集成了宽带(> 14MHz)电压误差放大器。电压模式控制结构和误差放大器允许使用III型补偿方案,使环路带宽达到开关频率的20%。较宽的环路频带能够保证快速瞬态响应,只需较小的输出电容,允许全陶瓷电容设计。

MAX8643提供两个三态逻辑输入,用于选择9种不同的输出电压。这些预设的输出电压为客户提供±1%的输出电压精度,无需使用昂贵的±0.1%精密电阻。另外,通过在反馈端使用两个外部电阻(内部0.6V基准)或在REFIN输入端施加外部基准电压,可以将输出电压设置在任何用户需要的数值。MAX8643利用外部电容编程软启动时间,以减少输入浪涌电流。MAX8643采用24引脚、4mm x 4mm薄型QFN无铅封装。

关于选择合适的电容、电阻和电感方面的指南,请使用我们的在线元件选型表格
MAX8643:典型工作电路 MAX8643:典型工作电路 放大+

关键特性

  • 内置37mΩ RDS(ON) MOSFET
  • 3A连续电流输出
  • 在整个负载、输入电压和温度范围内提供±1%的输出精度
  • 2.35V至3.6V工作电压
  • 输出电压在0.6V至(0.9 × VIN)之间可调
  • 软启动抑制输入浪涌电流
  • 500kHz至2MHz可调开关频率
  • 能够使用陶瓷、聚合物以及电解输出电容
  • VID选择输出电压
    • 0.6、0.7、0.8、1.0、1.2、1.5、1.8、2.0和2.5V
  • 完整的过压和过热保护
  • DDR应用中吸入/源出电流
  • 24引脚、4mm x 4mm薄型QFN无铅封装

应用

  • ASIC/CPU/DSP核与I/O供电
  • 基站电源
  • DDR电源
  • POL
  • RAID控制电源
  • 电信与网络电源

MAX8643EVKIT: MAX8643评估板

技术资料

设计指南 5133 Power-Supply Solutions for Altera FPGAs
设计指南 5132 Power-Supply Solutions for Xilinx FPGAs

质量和环境数据

产品可靠性报告: MAX8643.pdf 
无铅封装的锡(Sn)晶须报告

CAD Symbols and Footprints

  • MAX8643AETG+
  • MAX8643AETG+T
  • MAX8643AETG/V+
  • MAX8643AETG/V+T
  • MAX8643ETG+
  • MAX8643ETG+T
  • 型号   生产流程   工艺   样本量   不合格   FIT @ 25°C   FIT @ 55°C  

    备注: 通过技术手段对故障率进行汇总,并映射到相关的材料部件号。 故障率与被测件的数量密切相关。

    质量管理体系 >
    环境管理体系 >

     
    Status:
    Package:
    Temperature:

    相关资料


    MAX20343
    Ultra-Low Quiescent Current, Low Noise 3.5W Buck-Boost Regulator

    • Extend System Run Time
    • Low, Continuous Noise Profile
    • Adaptable Load Transient Response

    MAX20006E
    36V, 220kHz to 2.2MHz, 4A/6A/8A Fully Integrated Automotive Step-Down Converters

    • Multiple Functions for Small Size
    • High Precision
    • Robust for the Automotive Environment

    MAX20004E
    36V, 220kHz to 2.2MHz, 4A/6A/8A Fully Integrated Automotive Step-Down Converters

    • Multiple Functions for Small Size
    • High Precision
    • Robust for the Automotive Environment

    MAX20008E
    36V, 220kHz to 2.2MHz, 4A/6A/8A Fully Integrated Automotive Step-Down Converters

    • Multiple Functions for Small Size
    • High Precision
    • Robust for the Automotive Environment

    MAX17630
    4.5V to 36V, 1A, High-Efficiency, Synchronous Step-Down DC-DC Converter

    • Reduces External Components and Total Cost
    • Reduces Number of DC-DC Regulators to Stock
    • Reduces Power Dissipation

    MAX20011
    Automotive Single 8A/12A Step-Down Converter with High Efficiency

    • High-Efficiency DC-DC Converter
    • Up to 12A peak output current:
    • Differential Remote Voltage Sensing

    MAX15158Z
    High-Voltage Multiphase Boost Controller

    • Wide Operating Range
    • Integration Reduces Design Footprint
    • Robust Fault Protection Improves Quality and Reliability

    MAX20079
    Automotive 36V 3.5A Buck Converter with 3.5μA IQ

    • Synchronous DC-DC Converter with Integrated FETs
    • Small Solution Size Saves Space
    • PGOOD Output and High-Voltage EN Input Simplify Power Sequencing

    MAX20026, MAX20026S
    Automotive Quad, Low-Voltage Step-Down DC-DC Converters with Low-Noise LDO

    • High-Integration Shrinks Solution Size
    • Performance Designed for Automotive Point-of-Load Regulation
    • Low-Noise Features Improve EMI Performance

    MAX20026S
    Automotive Quad, Low-Voltage Step-Down DC-DC Converters with Low-Noise LDO

    • High-Integration Shrinks Solution Size
    • Performance Designed for Automotive Point-of-Load Regulation
    • Low-Noise Features Improve EMI Performance

    MAX20801
    MPP Tracking DC-DC Converter

    • Performs MPPT on 20-24 Series Connected PV Cells
    • Fast MPPT Reacts Quickly to Changing Conditions
    • Integrated Voltage-Limiting Clamps Output Voltage

    MAX20800
    MPP Tracking DC-DC Converter

    • Performs MPPT on 20-24 Series Connected PV Cells
    • Fast MPPT Reacts Quickly to Changing Conditions
    • Integrated Voltage-Limiting Clamps Output Voltage

    MAX20059
    72V, 1A, Automotive Synchronous Step-Down DC-DC Converter

    • Synchronous DC-DC Converters with Integrated FETs
    • Flexibility
    • Active-Low RESET Output and EN Input (26V max) Simplify Power Sequencing

    MAX20058
    60V, 1A, Automotive Synchronous Step-Down DC-DC Converter

    • Synchronous DC-DC Converters with Integrated FETs
    • Flexibility
    • Active-Low RESET Output and EN Input (26V max) Simplify Power Sequencing

    MAXM15066
    4.5V to 60V, 300mA Step-Down uSLIC Power Module

    • Easy to Use
    • High Efficiency
    • Flexible Design

    MAXM15067
    4.5V to 60V, 300mA Step-Down uSLIC Power Module

    • Easy to Use
    • High Efficiency
    • Flexible Design

    MAXM15065
    4.5V to 60V, 300mA Step-Down uSLIC Power Module

    • Easy to Use
    • High Efficiency
    • Flexible Design

    MAXM17904
    4.5V to 24V, 300mA Himalaya uSLIC Step-Down Power Module

    • Easy to Use
    • High Efficiency
    • Flexible Design

    MAXM17905
    4.5V to 24V, 300mA Himalaya uSLIC Step-Down Power Module

    • Easy to Use
    • High Efficiency
    • Flexible Design

    MAXM17906
    4.5V to 24V, 300mA Himalaya uSLIC Step-Down Power Module

    • Easy to Use
    • High Efficiency
    • Flexible Design

    MAX20048
    Automotive 40V, 55µA IQ, 2.2MHz, H-Bridge Buck-Boost Controller

    • Meets Stringent Automotive Quality and Reliability Requirements
    • Efficient Solution in a Small Solutions Size
    • Low Quiescent Current Helps Designers Meet Stringent OEM Current Requirements

    MAX20010C
    Automotive Single 6A Step-Down Converters

    • Fully Integrated, Synchronous 6A DC-DC Converter Enables Small Solution Size
    • High-Precision Voltage Regulator for Applications Processors
    • Low-Noise Feature Reduces EMI

    MAX20010D
    Automotive Single 6A Step-Down Converters

    • Fully Integrated, Synchronous 6A DC-DC Converter Enables Small Solution Size
    • High-Precision Voltage Regulator for Applications Processors
    • Low-Noise Feature Reduces EMI

    MAX20039
    Automotive, 2V to 36V, 2.2MHz, 0.6A/1.2A Buck-Boost Converters with Integrated H-Bridge Architecture

    • Meets Stringent Automotive Quality and Reliability Requirements
    • Low Quiescent Current Helps Designers Meet Stringent OEM Current Requirements (B and D version only)
    • High Switching Frequency Allows Use of Small External Components

    MAX20040
    Automotive, 2V to 36V, 2.2MHz, 0.6A/1.2A Buck-Boost Converters with Integrated H-Bridge Architecture

    • Meets Stringent Automotive Quality and Reliability Requirements
    • Low Quiescent Current Helps Designers Meet Stringent OEM Current Requirements (B and D version only)
    • High Switching Frequency Allows Use of Small External Components

    MAX20029B
    Automotive Quad/Triple/Quad Low-Voltage Step-Down DC-DC Converters

    • Quad Step-Down DC-DC Converters with Integrated FETs
    • Operate from 3.0V to 5.5V Supply Voltage
    • 1.0V to 4.0V Fixed or Adjustable Output Voltage

    MAX20029, MAX20029B, MAX20029C
    Automotive Quad/Triple/Quad Low-Voltage Step-Down DC-DC Converters

    • Quad Step-Down DC-DC Converters with Integrated FETs
    • Operate from 3.0V to 5.5V Supply Voltage
    • 1.0V to 4.0V Fixed or Adjustable Output Voltage

    MAX20029C
    Automotive Quad/Triple/Quad Low-Voltage Step-Down DC-DC Converters

    • Quad Step-Down DC-DC Converters with Integrated FETs
    • Operate from 3.0V to 5.5V Supply Voltage
    • 1.0V to 4.0V Fixed or Adjustable Output Voltage

    MAX77827
    5.5V输入、1.8A/3.1A开关升/降压转换器,6μA IQ

    • 1.8V至5.5V输入电压范围
    • 2.3V至5.3V单电阻可调节输出电压
    • 1.6A最大输出电流(3.1A ILIM选项,降压模式)

    MAXM15465
    4.5V至42V、300mA、喜马拉雅uSLIC降压型电源模块

    • 容易使用
    • 高效
    • 灵活的设计

    MAXM15466
    4.5V至42V、300mA、喜马拉雅uSLIC降压型电源模块

    • 容易使用
    • 高效
    • 灵活的设计

    MAXM15467
    4.5V至42V、300mA、喜马拉雅uSLIC降压型电源模块

    • 容易使用
    • 高效
    • 灵活的设计

    类型 编号 PDF 标题
    设计指南 5133 Power-Supply Solutions for Altera FPGAs
    设计指南 5132 Power-Supply Solutions for Xilinx FPGAs
    类型 编号 标题
    评估板5332MAX8643EVKIT MAX8643评估板