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  2. Power Management
  3. Battery Management
  4. Battery Charger IC
  5. Switching Battery Chargers
  6. LTC4020


Overview

Features and Benefits

  • Wide Voltage Range: 4.5V to 55V Input, Up to 55V Output (60V Absolute Maximums)
  • Synchronous Buck-Boost DC/DC Controller
  • Li-Ion and Lead-Acid Charge Algorithms
  • ±0.5% Float Voltage Accuracy
  • ±5% Charge Current Accuracy
  • Instant-On for Heavily Discharged Batteries
  • Ideal Diode Controller Provides Low Loss PowerPath When Input Power is Limited
  • Input Voltage Regulation for High Impedance Input Supplies and Solar Panel Peak Power Operation
  • Onboard Timer for Protection and Termination
  • Bad Battery Detection with Auto-Reset
  • NTC Input for Temperature Qualified Charging
  • Binary Coded Open-Collector Status Pins
  • Low Profile (0.75mm) 38-Pin 5mm × 7mm QFN Package

Product Details

The LTC4020 is a high voltage power manager providing PowerPath instant-on operation and high efficiency battery charging over a wide voltage range. An onboard buck-boost DC/DC controller operates with battery and/or system voltages above, below, or equal to the input voltage.

The LTC4020 seamlessly manages power distribution between battery and converter outputs in response to load variations, battery charge requirements and input power supply limitations.

The LTC4020 battery charger can provide a constant-current/constant-voltage charge algorithm (CC/CV), constant-current charging (CC), or charging with an optimized 4-step, 3-stage lead-acid battery charge profile. Maximum converter and battery charge currents are resistor programmable.

The IC's instant-on operation ensures system load power even with a fully discharged battery. Additional safety features include preconditioning for heavily discharged batteries and an integrated timer for termination and protection.

APPLICATIONS

  • Portable Industrial and Medical Equipment
  • Solar-Powered Systems
  • Military Communications Equipment
  • 12V to 24V Embedded Automotive Systems

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 (2)

Documentation & Resources

  • View All (14)
  • Data Sheets (1)
  • Reliability Data (1)
  • User Guides (4)
  • Product Selector Card (1)
  • Videos (2)
  • Application Notes (1)
  • Design Notes (1)
  • Press Releases (1)
  • Technical Articles (2)
  • Tools & Simulations

    LTspice

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    LTspice

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    LTC4020

    Product Recommendations

    LTC4020 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
    LTC4020EUHF#PBF Material Declaration Reliability Data 38-Lead QFN (5mm x 7mm w/ EP)
    LTC4020EUHF#TRPBF Material Declaration Reliability Data 38-Lead QFN (5mm x 7mm w/ EP)
    LTC4020IUHF#PBF Material Declaration Reliability Data 38-Lead QFN (5mm x 7mm w/ EP)
    LTC4020IUHF#TRPBF Material Declaration Reliability Data 38-Lead QFN (5mm x 7mm w/ EP)
    Wafer Fabrication Data R577 Reliability Data

    Sample & Buy


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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.