1. Products
  2. Power Management
  3. Inductorless (Charge Pump) DC/DC Converters
  4. Regulated Step-Up Charge Pumps
  5. LTC1682

Data Sheet
JP
User Guides
2 View All

Overview

Features and Benefits

  • Low Output Noise: 60µVRMS (100kHz BW)
  • Adjustable or Fixed Boosted Output
  • Adjustable Output Voltage Range: 2.5V to 5.5V
  • Fixed Output Voltages: 3.3V, 5V
  • Wide Input Voltage Range: 1.8V to 4.4V
  • Uses Small Ceramic Capacitors
  • No Inductors Required
  • Output Current up to 50mA
  • 550kHz Switching Frequency
  • Low Operating Current: 150µA
  • Low Shutdown Current: 1µA
  • Internal Thermal Shutdown and Current Limiting
  • Available in 8-Pin MSOP and SO Packages

Product Details

The LTC1682/LTC1682-3.3/LTC1682-5 are doubler charge pumps with an internal low noise, low dropout (LDO) linear regulator. These parts are designed to provide a low noise boosted supply voltage for powering noise sensitive devices such as high frequency VCOs in wireless applications.

An internal doubler charge pump converts a 1.8V to 4.4V input to a boosted output, while the internal LDO regulator converts the boosted voltage to a low noise regulated output. The adjustable version allows the user to set VOUT via external resistors connected to FB. The regulator is capable of supplying up to 50mA of output current. Shutdown reduces the supply current to < 5µA, removes the load from VIN by disabling the regulator and discharges VOUT to ground through a 100Ω switch.

The LTC1682 LDO regulator is stable with only 2µF on the output. Small ceramic capacitors can be used, reducing PC board area.

The LTC1682/LTC1682-3.3/LTC1682-5 are short-circuit and over temperature protected. The parts are available in 8-pin MSOP and SO packages.

Applications

  • VCO Power Supplies in Cellular Phones
  • 2-Way Pagers
  • Wireless PCMCIA Cards
  • Portable Medical Instruments
  • Low Power Data Acquisition
  • Remote Transmitters

Product Categories

Comparable Parts Click to see all in Parametric Search

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 (4)

Documentation & Resources

  • View All (6)
  • Data Sheets (1)
  • Reliability Data (1)
  • User Guides (2)
  • Design Notes (1)
  • Technical Articles (1)
    • Document Type

    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:

    LTC1682
    LTC1682-3.3
    LTC1682-5

    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
    LTC1682CMS8#PBF Material Declaration Reliability Data 8-Lead MSOP
    LTC1682CMS8#TRPBF Material Declaration Reliability Data 8-Lead MSOP
    LTC1682CMS8-3.3#PBF Material Declaration Reliability Data 8-Lead MSOP
    LTC1682CMS8-3.3#TRPBF Material Declaration Reliability Data 8-Lead MSOP
    LTC1682CMS8-5#PBF Material Declaration Reliability Data 8-Lead MSOP
    LTC1682CMS8-5#TRPBF Material Declaration Reliability Data 8-Lead MSOP
    LTC1682CS8#PBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
    LTC1682CS8#TRPBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
    LTC1682CS8-3.3#PBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
    LTC1682CS8-3.3#TRPBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
    LTC1682CS8-5#PBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
    LTC1682CS8-5#TRPBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
    LTC1682IMS8#PBF Material Declaration Reliability Data 8-Lead MSOP
    LTC1682IMS8#TRPBF Material Declaration Reliability Data 8-Lead MSOP
    LTC1682IMS8-3.3#PBF Material Declaration Reliability Data 8-Lead MSOP
    LTC1682IMS8-3.3#TRPBF Material Declaration Reliability Data 8-Lead MSOP
    LTC1682IMS8-5#PBF Material Declaration Reliability Data 8-Lead MSOP
    LTC1682IMS8-5#TRPBF Material Declaration Reliability Data 8-Lead MSOP
    LTC1682IS8#PBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
    LTC1682IS8#TRPBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
    LTC1682IS8-3.3#PBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
    LTC1682IS8-3.3#TRPBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
    LTC1682IS8-5#PBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
    LTC1682IS8-5#TRPBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
    Wafer Fabrication Data R402 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
    • LTC1682CMS8#PBF Production
    • LTC1682CMS8#TRPBF Production
    • LTC1682CMS8-3.3#PBF Production
    • LTC1682CMS8-3.3#TRPBF Production
    • LTC1682CMS8-5#PBF Production
    • LTC1682CMS8-5#TRPBF Production
    • LTC1682CS8#PBF Production
    • LTC1682CS8#TRPBF Production
    • LTC1682CS8-3.3#PBF Production
    • LTC1682CS8-3.3#TRPBF Production
    • LTC1682CS8-5#PBF Production
    • LTC1682CS8-5#TRPBF Production
    • LTC1682IMS8#PBF Production
    • LTC1682IMS8#TRPBF Production
    • LTC1682IMS8-3.3#PBF Production
    • LTC1682IMS8-3.3#TRPBF Production
    • LTC1682IMS8-5#PBF Production
    • LTC1682IMS8-5#TRPBF Production
    • LTC1682IS8#PBF Production
    • LTC1682IS8#TRPBF Production
    • LTC1682IS8-3.3#PBF Production
    • LTC1682IS8-3.3#TRPBF Production
    • LTC1682IS8-5#PBF Production
    • LTC1682IS8-5#TRPBF Production

    Support & Discussions

    LTC1682 Contact ADI Technical Support »
    LTC1682 Ask your question »
    LTC1682 Contact ADI Technical Support » LTC1682 Ask your question »

    Sample & Buy


    Ordering FAQs


    See our Ordering FAQs for answers to questions about online orders, payment options and more.

     

    Buy Now Pricing


    (**) Displayed Buy Now Price and Price Range is based on small quantity orders.

     

    List Pricing


    (*)The 1Ku 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. authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

     

    Lead Times


    Please see the latest communication from our CCO regarding lead times.

     

    Sampling


    Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.


    Price Table Help

     

    Evaluation Boards

    Pricing displayed is based on 1-piece.

    Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.

    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.

    •