1. Products
  2. Power Management
  3. Switching Regulators
  4. Step-Down (Buck) Regulators
  5. External Power Switch Buck Controllers
  6. ADP1822


Features and Benefits

  • Wide power input voltage range: 1 V to 24 V
  • Chip supply voltage range: 3.7 V to 5.5 V
  • Wide output voltage range: 0.6 V to 85% of input voltage
  • 1% accuracy, 0.6 V reference voltage
  • Output voltage margining control
  • Output voltage tracking
  • All N-channel MOSFET
  • 300 kHz, 600 kHz, or up to 1.2 MHz synchronized frequency
  • No current sense resistor required
  • Power-good output
  • Programmable soft start with reverse current protection
  • Current-limit protection

Product Details

The ADP1822 is a versatile and inexpensive synchronous voltage-mode PWM step-down controller. It drives an all N-channel power stage to regulate an output voltage as low as 0.6 V.

The ADP1822 regulated output can track another power supply and can be dynamically adjusted up or down with the controller’s margining-control inputs, making it ideal for high reliability applications. It is well suited for a wide range of high power applications, such as DSP power and processor core power in telecommunications, medical imaging, high performance servers, and industrial applications. It operates from a 3.7 V to 5.5 V supply with power input voltage ranging from 1.0 V to 24 V.

The ADP1822 can operate at any frequency between 300 kHz and 1.2 MHz, either by synchronizing with an external source or an internally generated, logic-controlled clock of 300 kHz or 600 kHz. It includes an adjustable soft start to allow sequencing and quick power-up while preventing input inrush current. Output reverse-current protection at startup prevents excessive output voltage excursions. The adjustable, virtually lossless current-limit scheme reduces external part count and improves efficiency.

The ADP1822 operates over the −40°C to +125°C junction temperature range and is available in a 24-lead QSOP package.


  • Telecommunications and networking systems
  • High performance servers
  • Medical imaging systems
  • DSP core power supplies
  • Microprocessor core power supplies
  • Mobile communication base stations
  • Distributed power

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits (1)

Tools & Simulations

Design Tools

ADP182x Buck Designer Tool

Microsoft Excel download tool from ADIsimPower to generate a power supply design complete with a schematic, bill of materials, and performance specifications.

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.

Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
ADP1822ARQZ-R7 Material Declaration Reliability Data 24-Lead QSOP
Wafer Fabrication Data

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Sample & Buy

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Evaluation Boards

Pricing displayed is based on 1-piece.

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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.