MAX5072

2.2MHz、双输出、buck或boost转换器,带有POR和电源失效输出


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说明

MAX5072双输出DC-DC转换器,集成高端n沟道MOSFET。每路输出可单独设置为buck或boost。MAX5072设计用于xDSL调制解调器电源管理。5.5V至23V宽电压输入范围允许使用低成本AC适配器对xDSL调制解调器供电。每路输出单独可调,buck模式可低至0.8V,boost模式可高至28V,输出电压精度可达±1%。Buck模式下,转换器1和转换器2分别可输出2A和1A电流。可在200kHz至2.2MHz之间设置每个转换器的开关频率,以避免xDSL工作频带中的谐波。两路输出工作在180°异相模式,可降低输入电容波纹电流,也可降低尺寸和成本。SYNC输入简化了外部频率同步。而且,CLKOUT为转换器2的异相时钟输出,在主从配置中,可采用两个MAX5072 IC实现四相工作。

MAX5072内部数字软启动功能可降低输入浪涌电流,避免输出电压过冲,确保上电过程中输出电压单调上升。器件具有电源良好输出、上电复位,以及手动复位功能。此外,每个转换器输出可单独关断。MAX5072具有“dying gasp”输出,当输入电压降低于预设值时置低。保护功能包括buck模式输出短路保护,以及boost模式最大占空比限制和过热关断等。

MAX5072提供热增强型32引脚薄型QFN封装,在+70°C环境温度中可耗散2.7W功率。器件工作在-40°C至+85°C扩展级温度范围或-40°C至+125°C汽车级温度范围。
MAX5072L:引脚配置 MAX5072:引脚配置 放大+

关键特性

  • 4.5V至5.5V或5.5V至23V输入电压范围
  • 0.8V (buck)至28V (boost)输出电压
  • 两个独立输出DC-DC转换器,带有内部功率MOSFET
  • 每输出可单独设为buck或boost模式
  • 降压模式下,IOUT1和IOUT2分别为2A和1A
  • 180°异相工作
  • 四相工作时钟输出
  • 开关频率200kHz至2.2MHz可设
  • 数字软启动和独立转换器关断
  • SYNC输入,上电复位,手动复位和电源失效输出
  • 电流短路保护(buck)/最大占空比限制(boost)
  • 过热关断
  • 热增强型32引脚薄型QFN封装,+70°C时可耗散2.7W功率

应用

  • 负载点DC-DC转换器
  • xDSL调制解调器
  • xDSL路由器
Part NumberVIN
(V)
VIN
(V)
VOUT1
(V)
VOUT1
(V)
Output Adjust. MethodIOUT1
(A)
Switch TypePower Good SignalICC
(mA)
DC-DC OutputsOper. Freq.
(kHz)
Package/PinsBudgetary
Price
minmaxminmaxtypSee Notes
MAX5072 4.5230.828Resistor2InternalYes2.222200
See Data Sheet
$3.11 @1k
查看所有Step-Down Switching Regulators (367)

Part NumberPackage/Pins
MAX5072 
TQFN/32
查看所有Step-Up Switching Regulators (98)
Pricing Notes:
价格仅供参考,用于同类产品的比较。所提供报价为美元,需要依汇率折合成人民币。该价格将因当地关税、税率和汇率而异。有关特定订购量和指定版本的报价和供货问题,请参考:价格与供货网站或与指定代理商联系。


MAX5072EVKIT: MAX5072评估板

CAD Symbols and Footprints

  • MAX5072ETJ+
  • MAX5072ETJ+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。

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