Alternative Parts

  • LTC4361-1 <br>LTC4361-2
    LTC4361-1
    LTC4361-2

    Overvoltage/Overcurrent Protection Controller

  • LTC2960
    LTC2960

    36V Nano-Current Two-Input Voltage Monitor

  • LTC2954
    LTC2954

    Push Button On/Off Controller with µP Interrupt

  • LTC4359
    LTC4359

    Ideal Diode Controller with Reverse Input Protection

Overview

Features and Benefits

  • Seamless Transition Between Power Sources: Li-Ion Battery, USB, and 6V to 36V External Supply
  • High Efficiency 1.2A Charger from 6V to 36V Input
  • Load Dependent Charging from USB Input Guarantees Current Compliance
  • 215mΩ Internal Ideal Diode plus Optional External Ideal Diode Controller Provides Low Loss Power Path When External Supply/USB Not Present
  • Constant-Current/Constant-Voltage Operation with Thermal Feedback to Maximize Charging Rate without Risk of Overheating
  • Selectable 100% or 20% Current Limit (e.g., 500mA/ 100mA) from USB Input
  • Preset 4.1V Charge Voltage with 0.8% Accuracy
  • C/10 Charge Current Detection Output
  • NTC Thermistor Input for Temperature Qualified Charging
  • Tiny (6mm × 3mm × 0.75mm) 22-Pin DFN Package

Product Details

The LTC4089-1 is a USB power manager plus high voltage Li-Ion battery charger. This device controls the total current used by the USB peripheral for operation and battery charging. Battery charge current is automatically reduced such that the sum of the load current and the charge current does not exceed the programmed input current limit. The LTC4089-1 also accommodates high voltage power supplies, such as 12V AC-DC wall adapters, FireWire, or automotive power.

The LTC4089-1 provides a fixed 5V output from the high voltage input to charge single cell Li-Ion batteries. The charge current is programmable and an end-of-charge status output (CHRG) indicates full charge. Also featured is programmable total charge time, an NTC thermistor input used to monitor battery temperature while charging and automatic recharging of the battery.

Part Number
Float Voltage NTC Hot Threshold Bat-Track HV Output
LTC4089 4.2V 29% VVNTC Yes
LTC4089-1 4.1V 32.6% VVNTC No
LTC4089-3 3.95V 32.6% VVNTC Yes
LTC4089-5 4.2V 29% VVNTC No

Applications

  • Portable USB Devices—GPS Receivers, Cameras, MP3 Players, PDAs

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.

Product Recommendations

LTC4089-1 Companion Parts

Recommended µModule Isolator

Recommended Related Parts

Reference Materials

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.

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The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.


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