MAX17552, MAX17552A

60V、100mA、超小尺寸、高效率、 同步降压型DC-DC转换器,空载耗流为22μA

60V、低IQ同步降压稳压器实现高效率


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说明

MAX17552是一款内置MOSFET, 高效、高压、同步降压型的DC-DC转换器,可工作在4V至60V输入电压范围。 转换器在0.8V至0.9 x VIN输出电压范围内,可提供高达100mA的输出电流。在-40°C至+125°C工作温度范围,输 出电压精度为不低于±1.75%。
器件采用峰值电流模式控制架构,有一个MODE引脚,可 用于选择脉宽调制(PWM)或脉冲频率调制(PFM)工作模式。 PWM工作模式在任何负载条件下都保持固定工作频率, 非常适用于对开关频率变化敏感的应用。PFM工作模式消除了负向电感电流以及轻载时使用跳脉冲以提高效率。 PFM模式下,转换器的空载耗流仅为22μA。低导通电阻的内置MOSFET确保满载时高效率,同时也简化了PCB的设计。
器件具有可编程开关频率,以优化方案尺寸和效率。可编程软启动功能降低用户浪涌电流。一个EN/UVLO引脚允许用户在输入电压达到相应要求值时开启/关断器件。开漏RESET引脚可以监控输出电压。器件工作在-40°C至 +125°C工业级温度范围,有10引脚(3mm x 2mm) TDFN 和10引脚(3mm x 3mm) μMAX®两种很小的封装。提供仿真模型。
MAX17552: Typical Application Circuit MAX17552: Typical Application Circuit 放大+

关键特性

  • 减少外部元器件,降低总体成本
    • 无需肖特基二极管——同步整流工作高效、低成本
    • 内部补偿
    • 内部固定的5.1ms或可编程软启动
    • 可全用陶瓷电容,使紧凑布局
  • 缩减DC-DC稳压器库存清单
    • 4V至60V宽输入电压范围
    • 0.8V至0.9 x VIN输出电压可调节
    • 提供高达100mA负载电流
    • 100kHz至2.2MHz可调节开关频率范围,带外同步
    • 可配置PFM和强制PWM两种工作模式
  • 降低功耗
    • 22μA空载电流
    • 峰值效率>90%
    • PFM特性使轻载时效率高
    • 1.2μA (典型值)关断电流
  • 能在恶劣工业环境下可靠工作
    • 峰值限流保护
    • 有内置输出电压监测的开漏RESET输入引脚
    • 可编程EN/UVLO门限
    • 启动时单调进入预偏置输出
    • 过热保护
    • 高工业级-40°C至+125°C工作范围/ -40°C至+150°C结温范围

应用

  • 4–20mA电流环供电传感器
  • 电池供电设备
  • 通用负载点电源
  • 替代高压LDO
  • HVAC与楼宇控制
  • 工业传感器和过程控制
Part NumberVIN
(V)
VIN
(V)
VOUT1
(V)
VOUT1
(V)
Output Adjust. MethodIOUT1
(A)
Switch TypeSynchronous SwitchingPower Good SignalDC-DC OutputsOper. Freq.
(kHz)
Design ToolsPackage/PinsBudgetary
Price
minmaxminmaxSee Notes
MAX17552 4600.854Resistor0.1InternalYesYes12200EE-Sim
TDFN/10
UMAX/10
$1.16 @1k
查看所有Step-Down Switching Regulators (389)
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。


MAX17552AUBEVKIT: Evaluation Kit for the MAX17552 (µMAX) in 5V Output-Voltage Application
MAX17552ATBEVKIT: Evaluation Kit for the MAX17552 (TDFN) in 5V Output Voltage Applications

工具和模型

  • EE-Sim: MAX17552 设计和仿真
  • MAX17552 SIMPLIS Schematic
  • 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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