MAX5073

2.2MHz、双输出、buck或boost转换器,内置功率MOSFET


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说明

MAX5073双输出DC-DC转换器,集成高边n沟道功率MOSFET。各路输出可单独设置为buck或boost转换器。器件可工作在5.5V至23V宽电压输入范围。在buck模式,各路输出可编程为低至0.8V,boost模式可高达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。各转换器的开关频率可在200kHz至2.2MHz之间编程,以避免无线设备中的差拍干扰并减小供电电源的尺寸。两路输出工作在180°异相模式,可降低输入电容的波纹电流、尺寸和成本。SYNC输入简化了外部频率同步。并且,CLKOUT输出为第2个转换器提供异相时钟,在主从配置中,可采用两片MAX5073 IC实现四相工作。

MAX5073包括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。各转换器可单独关断,带有电源就绪输出。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。

MAX5073提供热增强型28引脚薄型QFN封装,在+70°C环境温度中可耗散2.7W功率。器件额定工作于-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。
MAX5073:功能框图 MAX5073:功能框图 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
  • 两个独立输出的DC-DC转换器,带有内部功率MOSFET
  • 各路输出可单独配置为buck或boost模式
  • 降压模式下,IOUT1和IOUT2分别为2A和1A
  • 180°异相工作
  • 时钟输出用于四相工作
  • 开关频率可编程为200kHz至2.2MHz
  • 数字软启动和同步输入
  • 独立的转换关断和电源就绪输出
  • 短路保护(buck)/最大占空比限制(boost)
  • 过热关断
  • 热增强型28引脚薄型QFN封装,+70°C时可耗散2.7W功率

应用

  • 网络线卡
  • 负载点DC-DC转换器
  • 以太网供电后置调节器,用于PD
  • 电信线卡
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
MAX5073 5.5230.828Resistor2InternalYes2.222200
TQFN/28
$3.11 @1k
查看所有Step-Down Switching Regulators (367)

Part NumberPackage/Pins
MAX5073 
See Data Sheet
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。

CAD Symbols and Footprints

  • MAX5073ATI+
  • MAX5073ATI+T
  • MAX5073ETI+
  • MAX5073ETI+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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