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MAX680, MAX681
+5V至±10V电压变换器

同时产生正、负双输出


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概述
完整的数据资料 (PDF, 85kB)
英文 Download this datasheet in PDF format下载

The MAX680/MAX681 are monolithic, CMOS, dual charge-pump voltage converters that provide ±10V outputs from a +5V input voltage. The MAX680/MAX681 provide both a positive step-up charge pump to develop +10V from +5V input and an inverting charge pump to generate the -10V output. Both parts have an on-chip, 8kHz oscillator. The MAX681 has the capacitors internal to the package, and the MAX680 requires four external capacitors to produce both positive and negative voltages from a single supply.

The output source impedances are typically 150Ω, providing useful output currents up to 10mA. The low quiescent current and high efficiency make this device suitable for a variety of applications that need both positive and negative voltages generated from a single supply.

The MAX864/MAX865 are also recommended for new designs. The MAX864 operates at up to 200kHz and uses smaller capacitors. The MAX865 comes in the smaller µMAX® package.

关键特性   应用/使用
  • 95% Voltage-Conversion Efficiency
  • 85% Power-Conversion Efficiency
  • +2V to +6V Voltage Range
  • Only Four External Capacitors Required (MAX680)
  • No Capacitors Required (MAX681)
  • 500µA Supply Current
  • Monolithic CMOS Design

 
  • 从3V锂电池产生±6V
  • +5V至±10V逻辑电源
  • 电池供电应用
  • 数据采集
  • 手持式仪表(PDA、掌上电脑)
  • 运算放大器电源
  • 面板表

    Key Specifications:   Charge Pumps
    Part Number Topology VIN (min) (V) VIN (max) (V) Operating Current, ICC (max) (mA) Unadjusted VOUT (V) IOUT (typ) (A) Operating Frequency (kHz) RoHS Available Industry Qualified Package Smallest Available Package (max w/pins) (mm2) Operating Temp. Range (°C) Price**
    MAX680  Doubler
    Dual Output
    Inverter
    Unregulated
    2 6 2 +2xVIN
    -2xVIN
    0.01 8 Yes MIL-STD-883B Ceramic DIP/8
    DICE SALES/0
    PDIP/8
    SOIC/8
    31 -40 to +85
    -55 to +125
    0 to +70
    $1.87 @ 1k
    MAX681  No  -  PDIP/14 160  
    See All Charge Pumps (50)
    Notes:
    **This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

    图表
    MAX680,MAX681:典型工作电路s
    典型工作电路

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    参考文献: 19-0896; Rev. 1; 1996-07-01
    本页最后一次更新: 2007-06-27




             


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