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  5. LTC2922

Data Sheet
CN | JP
User Guides
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Overview

Features and Benefits

  • Tracks Multiple Supplies with MOSFET Switches
  • Monitors 5 Input Voltages Including VCC
  • Guaranteed Threshold Accuracy: ±1% at 0.5V
  • Automatic Remote Sense Switching
  • Adjustable Supply Ramp Rate
  • Overvoltage Monitor
  • Adjustable Electronic Circuit Breaker
  • Adjustable Power-Good Delay
  • Available for VCC Supply Voltages of 5V, 3.3V and 2.5V
  • Available in 16-Pin Narrow SSOP (LTC2921 Series) and 20-Pin TSSOP (LTC2922 Series)

Product Details

The LTC2921 and LTC2922 monitor up to five supplies and force them to track on power-up in multiple supply systems. Using external N-channel pass transistors, the supplies can be ramped up at an adjustable rate. Automatic remote sense switching allows the DC/DC converters to compensate for series voltage drops in the wiring. An incorrect level on one or more of the supplies triggers disconnect of all supplies. Tight 1% accuracy and glitch immunity on the low 0.5V monitoring level ensure no false error disconnects.

The LTC2921 and LTC2922 each feature an adjustable electronic circuit breaker to protect the VCC supply against short circuits. Capacitance at the TIMER pin programs the delays in the monitoring sequence.

The LTC2921 includes three remote sense switches in a 16-pin narrow SSOP package, while the LTC2922 includes five remote sense switches in a 20-pin TSSOP package. Both parts are available for VCC supply voltages of 5V, 3.3V, and 2.5V.

Applications

  • Desktop Computers
  • Plug-In Cards
  • Telecom Infrastructure
  • Supply Sequencing
  • Instruments

Product Categories

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This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

Evaluation Kits (3)

Documentation & Resources

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  • Data Sheets (1)
  • Reliability Data (1)
  • User Guides (1)
  • Technical Articles (2)
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    Tools & Simulations

    LTspice

    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.

    LTspice

    Models for the following parts are available in LTspice:

    LTC2922
    LTC2922-2.5
    LTC2922-3.3

    Product Recommendations

    LTC2922 Companion Parts

    Recommended Related Parts

    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
    LTC2922CF#PBF Material Declaration Reliability Data 20-Lead TSSOP
    LTC2922CF#TRPBF Material Declaration Reliability Data 20-Lead TSSOP
    LTC2922CF-2.5#PBF Material Declaration Reliability Data 20-Lead TSSOP
    LTC2922CF-2.5#TRPBF Material Declaration Reliability Data 20-Lead TSSOP
    LTC2922CF-3.3#PBF Material Declaration Reliability Data 20-Lead TSSOP
    LTC2922CF-3.3#TRPBF Material Declaration Reliability Data 20-Lead TSSOP
    LTC2922IF#PBF Material Declaration Reliability Data 20-Lead TSSOP
    LTC2922IF#TRPBF Material Declaration Reliability Data 20-Lead TSSOP
    LTC2922IF-2.5#PBF Material Declaration Reliability Data 20-Lead TSSOP
    LTC2922IF-2.5#TRPBF Material Declaration Reliability Data 20-Lead TSSOP
    LTC2922IF-3.3#PBF Material Declaration Reliability Data 20-Lead TSSOP
    LTC2922IF-3.3#TRPBF Material Declaration Reliability Data 20-Lead TSSOP
    Wafer Fabrication Data R493 Reliability Data

    PCN-PDN Information

    Select a model from the dropdown below to subscribe to PCN/PDN notifications and view past notifications as well.

    Select Model for PCN Information
    • LTC2922CF-3.3#PBF Production
    • LTC2922CF-3.3#TRPBF Production
    • LTC2922IF-3.3#PBF Production
    • LTC2922IF-3.3#TRPBF Production

    Support & Discussions

    LTC2922 Contact ADI Technical Support »
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    LTC2922 Contact ADI Technical Support » LTC2922 Ask your question »

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