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Compact, Dual-Output Charge Pump

Generates Bipolar Outputs, Ideal for Space-Sensitive Applications

Product Details

Key Features

Parametric specs for Charge Pumps
Topology Doubler
Dual Output
Inverter
Unregulated
VIN (V) (min) 1.75
VIN (V) (max) 6
IOUT (A) (typ) 0.018
Unadj. VOUT (V) ±2xVIN
IQ (mA) (max) 1.05
Switching Frequency (kHz) 24
Oper. Temp. (°C) -40 to +85
Package/Pins UMAX/8
Budgetary
Price (See Notes)
1.54
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Simplified Block Diagram

Technical Docs

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Parameters

Parametric specs for Charge Pumps
Topology Doubler
Dual Output
Inverter
Unregulated
VIN (V) (min) 1.75
VIN (V) (max) 6
IOUT (A) (typ) 0.018
Unadj. VOUT (V) ±2xVIN
IQ (mA) (max) 1.05
Switching Frequency (kHz) 24
Oper. Temp. (°C) -40 to +85
Package/Pins UMAX/8
Budgetary
Price (See Notes)
1.54

Key Features

  • 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)

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 3 Ni Cells or 1 Li+ Cell
  • VCO and GaAsFET Supplies

Description

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.

Simplified Block Diagram

MAX865: Typical Operating Circuit MAX865: Typical Operating Circuit Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .

Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.