High-Side Power Supply

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The MAX1822 high-side supply, using a regulated charge pump, generates a regulated output voltage 11V greater than the input supply voltage to power high-side switching and control circuits. The MAX1822 allows low-resistance N-channel MOSFETs (FETs) to be used in circuits that normally require costly, less efficient P-channel FETs and PNP transistors. The high-side output also eliminates the need for logic FETs in +5V and other low-voltage switching circuits.

A +3.5V to +16.5V input supply range and a typical quiescent current of only 150µA make the MAX1822 ideal for a wide range of line- and battery-powered switching and control applications where efficiency is crucial. Also provided is a logic-level power-ready output (PR) to indicate when the high-side voltage reaches the proper level.

The MAX1822 comes in an 8-pin SO package and requires three inexpensive external capacitors. The MAX1822 is a pin-for-pin replacement to the MAX622.
MAX1822: Typical Operating Circuit MAX1822: Typical Operating Circuit Enlarge+

Key Features

  • +3.5V to +16.5V Operating Supply Voltage Range
  • Output Voltage Regulated to VCC + 11V (typ)
  • 150µA (typ) Quiescent Current
  • Power-Ready Output


  • Battery Management
  • H-Switches
  • High-Side Power Control with N-Channel FETs
  • Low-Dropout Voltage Regulators
  • Portable Computing
  • Power Switching from Low Supply Voltages
  • Stepper Motor Drivers
Part NumberConfig.VSUPPLY
Package/PinsOper. Temp.
See Notes
MAX1822 High-Side N Drive3.5 to 16.5
SOIC (N)/8
-40 to +85$2.08 @1k
See All MOSFET Drivers (41)
Pricing 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 and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Technical Documents

Tutorial 5133 Power-Supply Solutions for Altera FPGAs
Tutorial 5132 Power-Supply Solutions for Xilinx FPGAs

Quality and Environmental Data

Product Reliability Reports: MAX1822.pdf 
Lead-Free Package Tin (Sn) Whisker Reports

CAD Symbols and Footprints

  • MAX1822EPA
  • MAX1822EPA+
  • MAX1822ESA
  • MAX1822ESA+
  • MAX1822ESA+T
  • MAX1822ESA-T
  • Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

    Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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