MAX1681:125mA、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

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.

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
MAX1680、MAX1681:典型工作电路
MAX1680、MAX1681:典型工作电路
应用
  • 接口供电
  • 本地负电源
  • MOSFET偏置
  • 运算放大器电源
数据手册DataSheet
语言下载文件备注
英文MAX1680-MAX1681.pdfRev 0; 07/1997
关键参数
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 +85SOIC(N)/8$2.29 @1k
MAX16813171000SOIC(N)/8
技术资料
质量和环境数据
相关产品
  • MAX860:50mA、频率可选的开关电容电压变换器
订购型号
型号状况推荐替代产品封装温度RoHS/无铅
MAX1681C/D停止供货DICE SALES,;NA引脚;DICE;0°C至+70°C参考数据资料
MAX1681ESA停止供货MAX1681ESA+SOIC(N),;8引脚;30.9mm²-40°C至+85°CRoHS/无铅:否
MAX1681ESA+生产中SOIC(N),;8引脚;30.9mm²-40°C至+85°CRoHS/无铅:无铅
MAX1681ESA+T生产中SOIC(N),;8引脚;30.9mm²-40°C至+85°CRoHS/无铅:无铅
MAX1681ESA-T停止供货MAX1681ESA+TSOIC(N),;8引脚;30.9mm²-40°C至+85°CRoHS/无铅:否
MAX1680-MAX1681.pdf MAX1681
Charge Pump Converts -5V to +5V MAX1681
Relay Driver Requires Only 25% Power MAX1681
Doubler/Inverter Charge Pumps Divide by Two MAX868
Charge Pump Doubles Negative Voltage MAX1681
DC-DC Conversion Without Inductors MAX871
Properties of the Charge-Pump Voltage Splitter MAX1697
MAX1681.pdf MAX1681
MAX1680-MAX1681.pdf MAX1681