1. Products
  2. Power Management
  3. Switching Regulators
  4. Step-Down (Buck) Regulators
  5. External Power Switch Buck Controllers
  6. LTC3822-1


Features and Benefits

  • Dual N-Channel MOSFET Synchronous Drive
  • No Current Sense Resistor Required
  • Optimized for 3.3VIN and Li-Ion Applications
  • Constant Frequency Current Mode Operation for Excellent Line and Load Transient Response
  • ±1% 0.6V Reference
  • Low Dropout Operation: 99% Duty Cycle
  • Phase-Lockable or Adjustable Frequency: 250kHz to 750kHz
  • Internal Soft-Start Circuitry
  • Tracking and Adjustable Soft-Start Input
  • Selectable Maximum Peak Current Sense Threshold
  • Selectable Burst Mode®/Forced Continuous/Pulse Skipping Mode at Light Load
  • Digital RUN Control Pin
  • Output Overvoltage Protection
  • Micropower Shutdown: IQ = 7.5µA
  • Tiny Thermally Enhanced 12-Pin (3mm × 3mm) DFN or 16-Pin Narrow SSOP Packages

Product Details

The LTC3822-1 is a synchronous step-down switching regulator controller that drives external N-channel power MOSFETs using few external components. The constant frequency current mode architecture with MOSFET VDS sensing eliminates the need for sense resistors and improves efficiency.

Burst Mode operation provides high efficiency at light loads. The 99% maximum duty cycle provides low dropout operation, extending operating time in battery-powered systems.

The operating frequency can be programmed up to 750kHz, allowing the use of small surface mount inductors and capacitors. For noise sensitive applications, the LTC3822-1 can be synchronized to an external clock from 250kHz to 750kHz.

The LTC3822-1 is available in the tiny footprint thermally enhanced 12-pin DFN package or 16-pin narrow SSOP package.

LTC3822 Internal soft-start, 34µA in sleep mode
LTC3822-1 External soft start, selectable pulse skip/Burst Mode operation, power good (SSOP-16 package only), 105µA in sleep mode


  • Single Cell Li-Ion Powered Systems
  • 3.3VIN Systems

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


LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

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Step 2: Click on the link in the section below to download a demonstration circuit.

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Models for the following parts are available in LTspice:


Product Recommendations

LTC3822-1 Companion Parts

Recommended Related Parts

Recommended Suggested Oscillator

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
LTC3822EDD-1#PBF Material Declaration Reliability Data 12-Lead DFN (3mm x 3mm w/ EP)
LTC3822EDD-1#TRPBF Material Declaration Reliability Data 12-Lead DFN (3mm x 3mm w/ EP)
LTC3822EGN-1#PBF Material Declaration Reliability Data 16-Lead SSOP (Narrow 0.15 Inch)
LTC3822EGN-1#TRPBF Material Declaration Reliability Data 16-Lead SSOP (Narrow 0.15 Inch)
Wafer Fabrication Data R421 Reliability Data

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Sample & Buy

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Evaluation Boards

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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.