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MAX865
Compact, Dual-Output Charge Pump

Generates Bipolar Outputs, Ideal for Space-Sensitive Applications


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Description
FULL DATA SHEET (PDF, 90kB)
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The MAX865 is a CMOS charge-pump DC-DC converter in an ultra-small µMAX® package. It produces positive and negative outputs 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 +1.5V to +6.0V.

The internal oscillator is guaranteed to be between 20kHz and 38kHz, keeping noise above the audio range while consuming minimal supply current. A 75Ω output impedance permits useful output currents up to 20mA.

The MAX865 comes in a 1.11mm-high, 8-pin µMAX package that occupies half the board area of a standard 8-pin SOIC. For a device with selectable frequencies and logic-controlled shutdown, refer to the MAX864 data sheet.

Key Features   Applications/Uses
  • 1.11mm-High µMAX Package
  • Compact: Circuit Fits in 0.08in2
  • Requires Only Four Capacitors
  • Dual Outputs (positive and negative)
  • +1.5V to +6.0V Input Voltage
  • 20kHz (min) Frequency (above the audio range)

 
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    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 Package Smallest Available Package (max w/pins) (mm2) Operating Temp. Range (°C) Price**
    MAX865  Doubler
    Dual Output
    Inverter
    Unregulated
    1.75 6 1.05 ±2xVIN 0.018 24 Yes uMAX/8 16 -40 to +85 $1.30 @ 1k
    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.

    Diagram
    MAX865: Typical Operating Circuit
    Typical Operating Circuit

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    Document Ref.: 19-0472; Rev 1; 1997-05-01
    This page last modified: 2008-07-14



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