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MAX1682, MAX1683
Switched-Capacitor Voltage Doublers

SOT23 Voltage Doubler Needs Only two External Caps; Ultra-Small LCD Supply for PDAs and Cell Phones


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Status
Active: In Production.

Description
FULL DATA SHEET (PDF, 200kB)
Download this datasheet in PDF formatDownload   Send this datasheet to any email addressE-Mail
The ultra-small MAX1682/MAX1683 monolithic, CMOS charge-pump voltage doublers accept input voltages ranging from +2.0V to +5.5V. Their high voltage-conversion efficiency (over 98%) and low operating current (110µA for MAX1682) make these devices ideal for both battery-powered and board-level voltage-doubler applications.

Oscillator control circuitry and four power MOSFET switches are included on-chip. The MAX1682 operates at 12kHz, and the MAX1683 operates at 35kHz. A typical application includes generating a 6V supply to power an LCD display in a hand-held PDA. Both parts are available in a 5-pin SOT23 package and can deliver 30mA with a typical voltage drop of 600mV.

Key Features   Applications/Uses
  • 5-Pin SOT23 Package
  • +2.0V to +5.5V Input Voltage Range
  • 98% Voltage-Conversion Efficiency
  • 110µA Quiescent Current (MAX1682)
  • Requires Only Two Capacitors
  • Up to 45mA Output Current

 
  • Cell Phones
  • Handy Terminals
  • PDAs
  • Small LCD Panels

    Key Specifications:  Charge Pumps
    Part Number Topology VIN
    (V)
    VIN
    (V)
    ICC
    (mA)
    Unadj. VOUT
    (V)
    IOUT
    (A)
    Oper. Freq.
    (kHz)
    Package/Pins Smallest Available Pckg.
    (mm2)
    Oper. Temp.
    (°C)
    Price
    min max max typ max w/pins See Notes
    MAX1682 
    Doubler
    Unregulated
    2 5.5 0.145 +2xVIN 0.045 12
    SOT/5
    9 -40 to +85 $0.72 @1k
    MAX1683  0.31 35
    SOT/5
    $0.72 @1k
    See All Charge Pumps (48)

    Diagram
    MAX1682, MAX1683: Typical Operating Circuit
    Typical Operating Circuit

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    Document Ref.: 19-1305; Rev 2; 2001-03-23
    This page last modified: 2007-06-01


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