MAX1680

125mA、频率可选、开关电容电压变换器

开关频率高达1MHz,允许使用小尺寸电容


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说明

The MAX1680/MAX1681 inductorless switched-capacitor voltage converters either invert an input voltage of +2.0V to +5.5V or double it while supplying up to 125mA output current. They have a selectable-frequency option that allows the use of small capacitors: 4.7µF (MAX1680), 1µF (MAX1681). With their high output current capability, these charge-pump devices are suitable replacements for inductor-based regulators, which require more expensive external components and additional board space.

The devices' equivalent output resistance (typically 3.5Ω) allows them to deliver as much as 125mA with only a 440mV drop. A shutdown feature reduces quiescent current to less than 1µA. The MAX1680/MAX1681 are available in 8-pin SO packages. For devices that deliver up to 50mA in smaller µMAX® packages, refer to the MAX860/MAX861 data sheet.
MAX1680、MAX1681:典型工作电路 MAX1680、MAX1681:典型工作电路 放大+

关键特性

  • Selectable Switching Frequencies:
    • 125kHz/250kHz (MAX1680)
    • 500kHz/1MHz (MAX1681)
  • Allow Use of Small Capacitors (1µF for the MAX1681)
  • 125mA Output Current
  • 3.5Ω Output Impedance
  • 1µA Logic-Controlled Shutdown
  • Configurable as Voltage Inverters or Doublers
  • +2.0V to +5.5V Input Voltage Range
  • Available in 8-Pin SO Packages
  • 90% Efficiency

应用

  • 接口供电
  • 本地负电源
  • MOSFET偏置
  • 运算放大器电源
Part NumberTopologyVIN
(V)
VIN
(V)
ICC
(mA)
Unadj. VOUT
(V)
IOUT
(A)
Oper. Freq.
(kHz)
Oper. Temp.
(°C)
Package/PinsBudgetary
Price
minmaxmaxtypSee Notes
MAX1680 
Doubler
Inverter
Unregulated
25.54.5
+2xVIN
-VIN
0.125250-40 to +85
SOIC (N)/8
$2.36 @1k
MAX1681 3171000
SOIC (N)/8
$2.31 @1k
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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。

技术资料

应用笔记 1876 Doubler/Inverter Charge Pumps Divide by Two
设计指南 725 DC-DC Conversion Without Inductors

质量和环境数据

产品可靠性报告: MAX1680.pdf 
无铅封装的锡(Sn)晶须报告

CAD Symbols and Footprints

  • MAX1680ESA+
  • MAX1680ESA+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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    相关资料

    类型 编号 PDF 标题
    应用笔记 1876 Doubler/Inverter Charge Pumps Divide by Two
    设计指南 725 DC-DC Conversion Without Inductors