MAX1708

高频、大功率、低噪声、升压型DC-DC转换器


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说明

MAX1708为大功率、升压型DC-DC转换器建立了一种新的、节省空间的标准。它利用内部功率MOSFET,能够将0.7V至5V电源电压转换为一个固定的输出电压(3.3V或5V)或可调节的输出电压(2.5V至5.5V),输出功率高达10W。

固定频率PWM工作模式确保开关噪声频谱限制在600kHz基频及其谐波范围内,允许通过简单的后置滤波器降低噪声。外部时钟同步功能可进一步限制噪声频谱。静态功耗低于1mW、可有效延长电池供电系统的工作时间。

两个控制输入端(ONA、/ONB)允许通过一个简单的单稳态按钮开关进行通、断控制,也可采用传统的通/断逻辑控制。MAX1708还提供可编程的软启动和电流限制,为进行灵活设计、优化电池供电的性能。最大开关额定电流均方值为5A。如需更高开关额定电流(10A)的器件,请参考MAX1709数据资料。
MAX1708:典型工作电路 MAX1708:典型工作电路 放大+

关键特性

  • 内置5A功率MOSFET
  • 3.3V输入时可提供5V、2A输出
  • 固定的3.3V或5V输出或可调节输出(2.5V至5.5V)
  • 输入电压范围可低至0.7V
  • 低功耗
    • 1mW静态功率
    • 关断模式下1µA电流
  • 低噪声、恒定工作频率(600Hz)
  • 可同步的开关频率(350kHz至1000kHz)
  • 小尺寸QSOP封装

应用

  • 手持通信装置的3.6V或5V RF PA
  • 本地2.5V至3.3V或5V转换器
  • 本地3.3V至5V转换器
  • 路由器、服务器、工作站、卡架
Part NumberVIN
(V)
VIN
(V)
VOUT1
(V)
VOUT1
(V)
Preset VOUT
(V)
IOUT1
(A)
Output Adjust. MethodSwitch TypeShutdown Mode Supply Current
(µA)
DC-DC OutputsOper. Freq.
(kHz)
Package/PinsBudgetary
Price
minmaxminmaxtypSee Notes
MAX1708 0.752.55
3.3
5
2
Preset
Resistor
Internal11350
QSOP/16
$4.85 @1k
查看所有Step-Up Switching Regulators (95)
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。


MAX1708EVKIT: MAX1708评估板

技术资料

应用笔记 4406 Power Supply Features Low VIN and VOUT

质量和环境数据

产品可靠性报告: MAX1708.pdf 
无铅封装的锡(Sn)晶须报告
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:

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    类型 编号 PDF 标题
    应用笔记 4406 Power Supply Features Low VIN and VOUT
    类型 编号 标题
    评估板3095MAX1708EVKIT MAX1708评估板