MAX865:Compact, Dual-Output Charge Pump

Generates Bipolar Outputs, Ideal for Space-Sensitive Applications

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
  • 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)
MAX865: Typical Operating Circuit
MAX865: Typical Operating Circuit
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titleDownload file
MAX865 Data SheetMAX865.pdf
Part NumberTopologyVIN
Unadj. VOUT
Oper. Freq.
Oper. Temp.
minmaxmaxtypSee Notes
Dual Output
1.7561.05±2xVIN0.01824-40 to +85µMAX/8$1.29 @1k
Quality and Environmental Data
Related Products
  • MAX864:Dual-Output Charge Pump with Shutdown
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX865EUANo Longer AvailableMAX865EUA+µMAX,;8 pin;15.6 mm²-40°C to +85°CNo
MAX865EUA+ActiveµMAX,;8 pin;15.6 mm²-40°C to +85°CLead Free
MAX865EUA+TActiveµMAX,;8 pin;15.6 mm²-40°C to +85°CLead Free
MAX865EUA-TNo Longer AvailableMAX865EUA+TµMAX,;8 pin;15.6 mm²-40°C to +85°CNo
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