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  6. LTC3714

Data Sheet
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Overview

Features and Benefits

  • True Current Mode with Ultrafast Transient Response
  • Stable with Ceramic COUT
  • tON(MIN) < 100ns for Operation from High Input Ranges
  • Supports Active Voltage Positioning
  • No Sense Resistor Required
  • 5-Bit VID Programmable Output Voltage: 0.6V to 1.75V
  • Dual N-Channel MOSFET Synchronous Drive
  • Programmable Output Offsets
  • Power Good Output Voltage Monitor
  • Wide VIN Range: 4V to 36V
  • ±1% 0.6V Reference
  • Adjustable Frequency
  • Programmable Soft-Start
  • Output Overvoltage Protection
  • Optional Short-Circuit Shutdown Timer
  • Forced Continuous Control Pin
  • Logic Controlled Micropower Shutdown: IQ ≤ 30μA
  • Available in 0.209" Wide 28-Lead SSOP Package

Product Details

The LTC3714 is a synchronous step-down switching regulator controller for CPU power. An output voltage between 0.6V and 1.75V is selected by a 5-bit code (Intel mobile VID specification). The controller uses a constant on-time, valley current control architecture to deliver very low duty cycles without requiring a sense resistor. Operating frequency is selected by an external resistor and is compensated for variations in VIN and VOUT.

Discontinuous mode operation provides high efficiency operation at light loads. A forced continuous control pin reduces noise and RF interference and can assist secondary winding regulation by disabling discontinuous mode when the main output is lightly loaded. Internal op amp allows programmable offsets to the output voltage during power saving modes.

Fault protection is provided by internal foldback current limiting, an output overvoltage comparator and optional short-circuit shutdown timer. Soft-start capability for supply sequencing is accomplished using an external timing capacitor. The regulator current limit level is user programmable. Wide supply range allows operation from 4V to 36V at the input.

Applications

  • Power Supply for Mobile Pentium® Processors and Transmeta Processors
  • Notebook and Portable Computers

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Evaluation Kits (1)

Documentation & Resources

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  • Data Sheets (1)
  • Reliability Data (1)
  • User Guides (1)
  • Design Notes (1)
  • Technical Articles (1)
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    Product Recommendations

    LTC3714 Companion Parts

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    Design Resources

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    Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
    LTC3714EG#PBF Material Declaration Reliability Data 28-Lead SSOP
    LTC3714EG#TRPBF Material Declaration Reliability Data 28-Lead SSOP
    Wafer Fabrication Data R384 Reliability Data

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    • LTC3714EG#PBF Production
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