MAX864:Dual-Output Charge Pump with Shutdown

Generates Bipolar Outputs

The MAX864 CMOS, charge-pump, DC-DC voltage converter produces a positive and a negative output from a single positive input, and requires only four capacitors. The charge pump first doubles the input voltage, then inverts the doubled voltage. The input voltage ranges from +1.75V to +6.0V. The internal oscillator can be pin-programmed from 7kHz to 185kHz, allowing the quiescent current, capacitor size, and switching frequency to be optimized. The 55Ω output impedance permits useful output currents up to 20mA. The MAX864 also has a 1µA logic-controlled shutdown. The MAX864 comes in a 16-pin QSOP package that uses the same board area as a standard 8-pin SOIC. For more space-sensitive applications, the MAX865 is available in an 8-pin µMAX® package, which uses half the board area of the MAX864.

Key Features
  • Requires Only Four Capacitors
  • Dual Outputs (Positive and Negative)
  • Low Input Voltages: +1.75V to +6.0V
  • 1µA Logic-Controlled Shutdown
  • Selectable Frequencies Allow Optimization of Capacitor Size and Supply Current
MAX864: Typical Operating Circuit
MAX864: Typical Operating Circuit
Applications/Uses
  • Data Acquisition
  • LCD Panels
  • Low-Cost Split Supply for Low-Voltage
  • Low-Voltage GaAsFET Bias in Wireless Handsets
  • Split Supply for Analog Circuitry
  • Split Supply from 2 to 4 Ni Cells or 1 Li+ Cell
  • VCO and GaAsFET Supplies
DataSheet
titleDownload file
MAX864 Data SheetMAX864.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
MAX864Doubler
Dual Output
Inverter
Unregulated
1.7561±2xVIN0.035185-40 to +85QSOP/16$1.50 @1k
Quality and Environmental Data
Related Products
  • MAX865:Compact, Dual-Output Charge Pump
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX864EEENo Longer AvailableMAX864EEE+QSOP,;16 pin;30.9 mm²-40°C to +85°CNo
MAX864EEE+ActiveQSOP,;16 pin;30.9 mm²-40°C to +85°CLead Free
MAX864EEE+TActiveQSOP,;16 pin;30.9 mm²-40°C to +85°CLead Free
MAX864EEE-TNo Longer AvailableMAX864EEE+TQSOP,;16 pin;30.9 mm²-40°C to +85°CNo
MAX864.pdf MAX864
MAX864.pdf MAX864
MAX864.pdf MAX864
MAX864.pdf MAX864
MAX864.pdf MAX864