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  2. Power Management
  3. Switching Regulators
  4. Step-Down (Buck) Regulators
  5. External Power Switch Buck Controllers
  6. LTC3773

Data Sheet
PDF
JP
User Guide
2 View All

Overview

Features and Benefits

  • Current Mode Controller with On-board MOSFET Drivers
  • Programmable Power Up/Down Tracking
  • Wide VIN Range: 3.3V to 36V (VCC = 5V)
  • ±1% 0.6V VFB Accuracy Over Temperature
  • Power Good Output Voltage Monitor
  • Phase-Lockable or Adjustable Frequency: 160kHz to 700kHz
  • OPTI-LOOP® Compensation Minimizes COUT
  • Current Foldback and Overvoltage Protection
  • Selectable Continuous, Discontinuous or Burst Mode® Operation at Light Load
  • Programmable Phase Operation
  • Available in 5mm × 7mm QFN and 36-Lead
  • SSOP Packages

Product Details

The LTC3773 is a high performance, 3-phase, triple output synchronous step-down switching regulator controller with output voltage power up/down tracking capability. The controller allows for sequential, coincident or ratiometric tracking.

This 3-phase controller drives its output stages with 120° phase separation at frequencies of up to 700kHz per phase minimizing the RMS input current. Light load efficiency can be maximized by using selectable Burst Mode operation. The 0.6V precision reference supports output voltages from 0.6V to 5V.

Fault protection features include output overvoltage, input undervoltage lockout plus current foldback under short-circuit or overload conditions.

Applications

  • Servers, Telecom, Industrial Power Supplies
  • General Purpose Multiple Rail DC/DC
  • FPGA and DSP Requirements

Product Categories

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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 (2)

Documentation & Resources

  • View All (5)
  • Data Sheet (1)
  • Reliability Data (1)
  • User Guide (2)
  • Design Note (1)
    • Document Type

    Tools & Simulations

    LTspice

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    LTspice

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    LTC3773

    Product Recommendations

    LTC3773 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
    LTC3773EG#PBF Material Declaration Reliability Data 36-Lead SSOP
    LTC3773EG#TRPBF Material Declaration Reliability Data 36-Lead SSOP
    LTC3773EUHF#PBF Material Declaration Reliability Data 38-Lead QFN (5mm x 7mm w/ EP)
    LTC3773EUHF#TRPBF Material Declaration Reliability Data 38-Lead QFN (5mm x 7mm w/ EP)
    Wafer Fabrication Data R384 Reliability Data

    PCN-PDN Information

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    Select Model for PCN Information
    • LTC3773EG#PBF Production
    • LTC3773EG#TRPBF Production

    Support & Discussions

    LTC3773 Contact ADI Technical Support »
    LTC3773 Ask your question »
    LTC3773 Contact ADI Technical Support » LTC3773 Ask your question »

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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.

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