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  2. Power Monitor, Control, and Protection
  3. Sequencers, Trackers, and Margining Controllers
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  5. LTC2923

Data Sheet
JP
User Guides
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Overview

Features and Benefits

  • Flexible Power Supply Tracking
  • Tracks Both Up and Down
  • Power Supply Sequencing
  • Supply Stability is Not Affected
  • Controls Two Supplies Without Series FETs
  • Controls a Third Supply With a Series FET
  • Adjustable Ramp Rates
  • Electronic Circuit Breaker
  • Available in 10-Lead MS and 12-Lead (4mm × 3mm) DFN Packages

Product Details

The LTC2923 provides a simple solution to power supply tracking and sequencing requirements. By selecting a few resistors, the supplies can be configured to ramp-up and ramp-down together or with voltage offsets, time delays or different ramp rates.

By introducing currents into the feedback nodes of two independent switching regulators, the LTC2923 causes their outputs to track without inserting any pass element losses. Because the currents are controlled in an openloop manner, the LTC2923 does not affect the transient response or stability of the supplies. Furthermore, it presents a high impedance when power-up is complete, effectively removing it from the DC/DC circuit.

For systems that require a third supply, one supply can be controlled with a series FET. This optional series FET can also control a supply that does not allow direct access to its feedback resistors (e.g., a power module) or a supply whose output cannot be forced to ground (e.g., a 3-terminal linear regulator). When the FET is used, an electronic circuit breaker provides protection from short-circuit conditions.

Applications

  • VCORE and VI/O Supply Tracking
  • Microprocessor, DSP and FPGA Supplies
  • Servers
  • Communication Systems

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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 (5)
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    Tools & Simulations

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    Product Recommendations

    LTC2923 Companion Parts

    Recommended Related Parts

    Design Resources

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    Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
    LTC2923CDE#PBF Material Declaration Reliability Data 12-Lead DFN (4mm x 3mm w/ EP)
    LTC2923CDE#TRPBF Material Declaration Reliability Data 12-Lead DFN (4mm x 3mm w/ EP)
    LTC2923CMS#PBF Material Declaration Reliability Data 10-Lead MSOP
    LTC2923CMS#TRPBF Material Declaration Reliability Data 10-Lead MSOP
    LTC2923IDE#PBF Material Declaration Reliability Data 12-Lead DFN (4mm x 3mm w/ EP)
    LTC2923IDE#TRPBF Material Declaration Reliability Data 12-Lead DFN (4mm x 3mm w/ EP)
    LTC2923IMS#PBF Material Declaration Reliability Data 10-Lead MSOP
    LTC2923IMS#TRPBF Material Declaration Reliability Data 10-Lead MSOP
    Wafer Fabrication Data R413 Reliability Data

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    Select Model for PCN Information
    • LTC2923CMS#PBF Production
    • LTC2923CMS#TRPBF Production
    • LTC2923IMS#PBF Production
    • LTC2923IMS#TRPBF Production

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