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  4. USB Power Manager (PowerPath, Battery Charger)
  5. LTC4098

Data Sheet
PDF
JP
User Guides
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Overview

Features and Benefits

  • Switching Regulator with Bat-Track™ Adaptive Output Control Makes Optimal Use of Limited Power Available from USB Port to Charge Battery and Power Application
  • Overvoltage Protection Guards Against Damage
  • Bat-Track External Step-Down Switching Regulator Control Maximizes Efficiency from Automotive, Firewire and Other High Voltage Input Sources
  • 180mΩ Internal Ideal Diode Plus External Ideal Diode Controller Seamlessly Provide Low Loss PowerPath™ when Input Power is Limited or Unavailable
  • Preset 4.2V Charge Voltage with 0.5% Accuracy (4.1V for LTC4098-1)
  • 4.1V Float Voltage (LTC4098-1) Improves Battery Life and High Temperature Safety Margin
  • Instant-On Operation with Discharged Battery
  • 700mA Maximum Load Current from USB Port
  • 1.5A Maximum Charge Current with Thermal Limiting
  • 20-Lead 3mm × 4mm × 0.75mm QFN Package

Product Details

The LTC4098/LTC4098-1 are high efficiency USB Power-Path controllers and full-featured Li-Ion/Polymer battery chargers. They seamlessly manage power distribution from multiple sources including USB, wall adapter, automotive, Firewire or other high voltage DC/DC converters, and a Li-Ion/Polymer battery.

The LTC4098/LTC4098-1’s internal switching regulator automatically limits its input current for USB compatibility. For automotive and other high voltage applications, the LTC4098/LTC4098-1 interface with an external switching regulator to provide a high efficiency high voltage power path. Both the USB and the optional high voltage inputs feature Bat-Track optimized charging to provide maximum power to the application and ease thermal issues in high power density applications with input supplies from 5V to as high as 38V.

An overvoltage circuit protects the LTC4098/LTC4098-1 from high voltage damage on the USB/wall adaptor inputs with an N-channel FET and a resistor.

The LTC4098/LTC4098-1 are available in a 20-lead, 3mm × 4mm × 0.75mm QFN surface mount package.

  Float Voltage
LTC4098 4.2V (1-cell Li-Ion/Li-Polymer)
LTC4098-1 4.1V (1-cell Li-Ion/Li-Polymer)
LTC4098-3.6 3.6V (1-cell LiFePO4)

Applications

  • Media Players
  • GPS
  • PDAs
  • Smart Phones

Product Categories

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Product Lifecycle icon-recommended Recommended for New Designs

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 (4)

Documentation & Resources

  • View All (10)
  • Data Sheets (1)
  • Reliability Data (1)
  • User Guides (4)
  • Design Notes (1)
  • Product Selector Card (1)
  • Technical Articles (2)
    • Document Type

    Product Recommendations

    LTC4098 Companion Parts

    Recommended µModule Isolator

    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
    LTC4098EUDC#PBF Material Declaration Reliability Data 20-Lead QFN (3mm x 4mm x 0.75mm w/ EP)
    LTC4098EUDC#TRPBF Material Declaration Reliability Data 20-Lead QFN (3mm x 4mm x 0.75mm w/ EP)
    LTC4098EUDC-1#PBF Material Declaration Reliability Data 20-Lead QFN (3mm x 4mm x 0.75mm w/ EP)
    LTC4098EUDC-1#TRPBF Material Declaration Reliability Data 20-Lead QFN (3mm x 4mm x 0.75mm w/ EP)
    Wafer Fabrication Data R540 Reliability Data

    Support & Discussions

    LTC4098 Contact ADI Technical Support »
    LTC4098 Ask your question »
    LTC4098 Contact ADI Technical Support » LTC4098 Ask your question »

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