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  4. Battery Fuel Gauge and Coulomb Counter
  5. LTC1559

Data Sheet
JP

Alternative Parts

LT1579
LT1579

300mA Dual Input Smart Battery Backup Regulator

LTC4110
LTC4110

Battery Backup System Manager

Overview

Features and Benefits

  • Not Recommended For New Designs. Contact Analog Devices for Potential Replacement.
  • Complete Battery Backup System in an SO-8, 16-Pin GN or SO Package
  • Generates Fixed Backup Voltage (3.07V/4.63V) from a Single 1.2V NiCd Button Cell
  • Automatic Main Supply to Backup Switching
  • Minimum 100mW Output Power
  • Automatic Fast Recharge of NiCd Battery
  • Programmable NiCd Trickle Charge Current
  • Smart NiCd Charger Minimizes Recharge Time and Maximizes System Efficiency After Backup
  • Onboard Power-Up and Push-Button Reset Generator
  • Performs VCC Supervisory Functions
  • Reset Assertion Guaranteed at VCC = 1V
  • Short-Circuit Protection
  • Thermal Limiting

Product Details

Not Recommended For New Designs. Contact Analog Devices for Potential Replacement.

The LTC1559 is a backup battery controller that provides all the functions necessary to implement a backup 3.3V or 5V power supply using a single NiCd cell. It includes a 1.2V to 3.07V/4.63V boost converter, an intelligent 2-stage battery charger, automatic backup switching and a microprocessor reset generator. The boost converter uses a synchronous switching architecture to achieve a typical efficiency of 70%, ensuring maximum backup lifetime from a small NiCd cell.

The on-chip NiCd charger uses an internal gas gauge to minimize fast recharge time and prevent overcharging of the backup cell, thereby improving system efficiency and extending the life of the backup cell. The LTC1559 also provides a user programmable trickle charge current to compensate for self-discharge losses in the backup cell.

The LTC1559’s automatic backup switching scheme requires minimum intervention from the host system and provides feedback to the host to minimize system loading in the backup state. Its internal VCC fault detector and reset generator eliminate the need for a separate microprocessor supervisory chip in most applications.

The LTC1559 is available in an SO-8, 16-pin GN or SO package.

Applications

  • Notebook Computers
  • Palmtop Computers/PDAs
  • Portable Instruments
  • Battery-Powered Systems

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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

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  • Data Sheets (1)
  • Reliability Data (1)
    • Document Type

    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
    LTC1559CGN-3.3#PBF Material Declaration Reliability Data 16-Lead SSOP (Narrow 0.15 Inch)
    LTC1559CGN-3.3#TRPBF Material Declaration Reliability Data 16-Lead SSOP (Narrow 0.15 Inch)
    LTC1559CGN-5#PBF Material Declaration Reliability Data 16-Lead SSOP (Narrow 0.15 Inch)
    LTC1559CGN-5#TRPBF Material Declaration Reliability Data 16-Lead SSOP (Narrow 0.15 Inch)
    LTC1559CS-3.3#PBF Material Declaration Reliability Data 16-Lead SOIC (Narrow 0.15 Inch)
    LTC1559CS-3.3#TRPBF Material Declaration Reliability Data 16-Lead SOIC (Narrow 0.15 Inch)
    LTC1559CS-5#PBF Material Declaration Reliability Data 16-Lead SOIC (Narrow 0.15 Inch)
    LTC1559CS-5#TRPBF Material Declaration Reliability Data 16-Lead SOIC (Narrow 0.15 Inch)
    LTC1559CS8-3.3#PBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
    LTC1559CS8-3.3#TRPBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
    LTC1559CS8-5#PBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
    LTC1559CS8-5#TRPBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
    Wafer Fabrication Data R370 Reliability Data

    PCN-PDN Information

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    Select Model for PCN Information
    • LTC1559CGN-3.3#PBF Production
    • LTC1559CGN-3.3#TRPBF Production
    • LTC1559CGN-5#PBF Production
    • LTC1559CGN-5#TRPBF Production
    • LTC1559CS-3.3#PBF Production
    • LTC1559CS-3.3#TRPBF Production
    • LTC1559CS-5#PBF Production
    • LTC1559CS-5#TRPBF Production
    • LTC1559CS8-3.3#PBF Production
    • LTC1559CS8-3.3#TRPBF Production
    • LTC1559CS8-5#PBF Production
    • LTC1559CS8-5#TRPBF Production

    Support & Discussions

    LTC1559 Contact ADI Technical Support »
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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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