LTC3714

PRODUCTION

Intel Compatible, Wide Operating Range, Step-Down Controller with Internal Op Amp

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Overview

  • 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

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
LTC3714
Intel Compatible, Wide Operating Range, Step-Down Controller with Internal Op Amp
Figure 1. High Efficiency Step-Down Converter Transient Response of 8A to 23A Output Load Step Product Package 1
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

Design Note 1

Technical Articles 1

Data Sheet

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
Circuit Monitors 1
LTC2960
RECOMMENDED FOR NEW DESIGNS 36V Nano-Current Two-Input Voltage Monitor
Power System Management (PSM) & Sequencers 1
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Protection Switches & Controllers 1
LT4363
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Switching Regulators & Controllers 1
LTC3880
RECOMMENDED FOR NEW DESIGNS Dual Output PolyPhase Step-Down DC/DC Controller with Digital Power System Management
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Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

  • LTC3714
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Evaluation Kits

eval board
schematic 1
DC371A

LTC3714EG | Intel's Notebook Processor Power Supply, 7.5V to 24V Input, 0.6V to 1.75VOUT @ 20A

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Product Details

DC371A: Demo Board for the LTC3714 Intel Compatible, Wide Operating Range, Step-Down Controller with Internal Op Amp.


 
DC371A
LTC3714EG | Intel's Notebook Processor Power Supply, 7.5V to 24V Input, 0.6V to 1.75VOUT @ 20A
DC371A - Schematic

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