MAX1683:Switched-Capacitor Voltage Doublers

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

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
  • 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
MAX1682, MAX1683: Typical Operating Circuit
MAX1682, MAX1683: Typical Operating Circuit
Applications/Uses
  • Cell Phones
  • Handy Terminals
  • PDAs
  • Small LCD Panels
DataSheet
titleDownload file
MAX1682-MAX1683 Data SheetMAX1682-MAX1683.pdf
Parametrics
Part NumberTopologyVIN
(V)
VIN
(V)
ICC
(mA)
Unadj. VOUT
(V)
IOUT
(A)
Oper. Freq.
(kHz)
Oper. Temp.
(°C)
Package/PinsBudgetary
Price
minmaxmaxtypSee Notes
MAX1682Doubler
Unregulated
25.50.145+2xVIN0.04512-40 to +85SOT/5$0.71 @1k
MAX16830.3135SOT/5
Quality and Environmental Data
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX1683EUK+ActiveSOT,;5 pin;9 mm²-40°C to +85°CLead Free
MAX1683EUK+TActiveSOT,;5 pin;9 mm²-40°C to +85°CLead Free
MAX1683EUK-TNo Longer AvailableMAX1683EUK+TSOT,;5 pin;9 mm²-40°C to +85°CNo
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