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ADP2108:  Compact, 600 mA, 3 MHz, Step-Down DC-to-DC Converter

Product Details


The ADP2108 is a high efficiency, low quiescent current step-down dc-to-dc converter manufactured in two different packages. The total solution requires only three tiny external components. It uses a proprietary, high speed current mode, constant frequency PWM control scheme for excellent stability and transient response. To ensure the longest battery life in portable applications, the ADP2108 has a power save mode that reduces the switching frequency under light load conditions.

The ADP2108 runs on input voltages of 2.3 V to 5.5 V, which allows for single lithium or lithium polymer cell, multiple alkaline or NiMH cell, PCMCIA, USB, and other standard power sources. The maximum load current of 600 mA is achievable across the input voltage range.

The ADP2108 is available in fixed output voltages of 3.3 V, 3.0 V, 2.5 V, 2.3 V, 1.82 V, 1.8 V, 1.5 V, 1.3 V, 1.2 V, 1.1 V, and 1.0 V. All versions include an internal power switch and synchronous rect-ifier for minimal external part count and high efficiency. The ADP2108 has an internal soft start and is internally compensated. During logic controlled shutdown, the input is disconnected from the output and the ADP2108 draws less than 1 μA from the input source.

Other key features include undervoltage lockout to prevent deep battery discharge and soft start to prevent input current over-shoot at startup. The ADP2108 is available in 5-ball WLCSP and 5-lead TSOT packages. The ADP2109 provides the same features and operations as the ADP2108 and has the additional function of a discharge switch in the WLCSP package.

Applications

  • PDAs and palmtop computers
  • Wireless handsets
  • Digital audio, portable media players
  • Digital cameras, GPS navigation units
  • Data Sheet, Rev. C, 4/09

    FEATURES and BENEFITS

    • Chinese data sheet available
    • Peak efficiency: 95%
    • 3 MHz fixed frequency operation
    • Typical quiescent current: 18 μA
    • Maximum load current: 600 mA
    • Input voltage: 2.3 V to 5.5 V
    • Uses tiny multilayer inductors and capacitors
    • Current mode architecture for fast load and line transient response
    • 100% duty cycle low dropout mode
    • Internal synchronous rectifier
    • Internal synchronous rectifier
    • Internal soft start
    • See data sheet for additional Information

    Typical Application Circuit for ADP2108

    OF NOTE ...

    2009 Top 10 Award For over 40 years ADI has been recognized as the innovation leader. This proud tradition continues today with the ADP2108 DC-to-DC Converter. The ADP2108 is the recipient of the prestigious 2009 Product of the Year Award presented by Electronic Products China.

    Documentation

    Title Content Type File Type
    ADP2108: Compact, 600 mA, 3 MHz, Step-Down DC-to-DC Converter Data Sheet (Rev H, 06/2014) (pdf, 1059 kB) Data Sheets PDF
    AN-1072: How to Successfully Apply Low Dropout Regulators  (pdf, 105 kB)
    This application note reviews the basic LDO topology, explains key specifications, and shows the application of low dropout voltage regulators in systems.
    Application Notes PDF
    CN-0190: Robust, Multivoltage, High Efficiency, 25 W Universal Power Supply Module with 6 V to 14 V Input  (pdf, 357 kB) Circuit Note PDF
    Introduction to ADIsimPower
    ADIsimPower is a smart selector and a collection of downloadable tools that produce complete and optimized power designs. Schematic, bill of materials, and performance data are customized to your specific needs in minutes.
    Videos HTML
    Isolating Power in Communication Bus and Gate Drive Applications
    Starting with a communications application overview of small power options through the process of selecting the right power products this webcast is a great resource for your communications applications designs.
    Webcasts WEBCAST
    UG-039: RedyKit User Guide for the ADP2108 Buck Converter  (pdf, 143 kB)
    Order the RedyKit for easy product evaluation and prototyping. The RedyKit ships with 2 preset evaluation boards plus 3 each of the standard fixed output voltage options in the product family. This allows evaluation of any voltage option with kit.
    User Guides PDF
    Understanding How Voltage Regulators Work Technical Articles HTML
    The Fundamentals of LDO Design and Applications Technical Articles HTML
    Optimizing Power Systems for Portable Electronic Devices
    System architects can optimize power-system efficiency by selecting the best system voltages for the application, using the right power-supply elements, and designing all the power-system elements to work together to reduce battery drain.
    (Power Electronics Technology, July 1, 2009)
    Technical Articles HTML
    ADP1829, ADP210x, ADP171x Reference Design  (pdf, 447 kB)
    Seven Output Voltages: 5.0 V, 3.6 V, 3.3 V, 2.5 V, 1.8 V, 1.2 V, 0.9 V; Output Current: 0.002 A to 3.0 A; Input voltage: 10.8-13.2 V; Ripple 2% ppk of Output Voltage; Transient step ±5%, 50% max load
    Power Reference Designs PDF
    ADP1829, ADP210x and ADP171x Reference Design  (pdf, 687 kB)
    Seven Output Voltages: 3.6 V, 3.3 V,3.3l V 2.5 V, 1.8 V, 1.25 V, 0.9 V; Output Current: 0.002 A to 3.0 A; Input voltage: 10.8-13.2 V; Ripple 2% ppk of Output Voltage; Transient step ±5%, 50% max load
    Power Reference Designs PDF
    What are LDOs and how are they used? FAQs/RAQs HTML
    RAQs index Rarely Asked Questions HTML
    Glossary of EE Terms Glossary HTML

    Design Tools,Models,Drivers & Software

    Title Content Type File Type
    ADP21xx Buck Regulator Design Tool  (zip, 0)
    Microsoft Excel download tool from ADIsimPower to generate a power supply design complete with a schematic, bill of materials, and performance specifications.
    ADIsim Design/Simulation Tools ZIP
    ADI Linear Regulator Design Tool and Parametric Search  (zip)
    Microsoft Excel download tool from ADIsimPower to generate a power supply design complete with a schematic, bill of materials, and performance specifications.
    ADIsim Design/Simulation Tools ZIP
    Download files for ADIsimPower™ Voltage Regulator Design Tool
    The individual Excel-based voltage regulator design tools used in ADIsimPower™.
    ADIsim Design/Simulation Tools HTML
    ADIsimPower™ Voltage Regulator Design Tool
    This expert design tool produces custom DC-DC converter designs in about a minute. The user enters 5 inputs and chooses to optimize for efficiency, PCB space, cost, or part count. Output is a complete schematic, BOM, efficiency plot, and performance summary. A PDF summary and a blank PCB is offered for each design to facilitate fast prototyping to verify the design.
    ADIsim Design/Simulation Tools HTML
    Launch of ADIsimPower Voltage Regulator Selection Vin (min) V Vout V   Find Solutions
    Vin (max) V Iout A

    Evaluation Kits & Symbols & Footprints

    Evaluation Boards & KitsView the Evaluation Boards and Kits page for documentation and purchasing

    Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

    Product Recommendations & Reference Designs

    Engineered. Tested. Ready to Integrate.
    Learn More

    SampleSample & Buy

    Price, packaging, availability

    ADP2108 Model Options
    Model Package Pins Temp.
    Range
    Packing,
    Qty
    Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
    Purchase/Sample
    ADP2108ACBZ-1.0-R7 Status: Production CHIPS W/SOLDER BUMPS/WLCSP 5 Ind Reel, 3000 - $0.60 Y  Material Info PCN Purchase Sample
    ADP2108ACBZ-1.1-R7 Status: Production CHIPS W/SOLDER BUMPS/WLCSP 5 Ind Reel, 3000 - $0.60 Y  Material Info PCN Purchase Sample
    ADP2108ACBZ-1.2-R7 Status: Production CHIPS W/SOLDER BUMPS/WLCSP 5 Ind Reel, 3000 - $0.60 Y  Material Info PCN Purchase Sample
    ADP2108ACBZ-1.3-R7 Status: Production 5 Ball WLCSP 5 Ind Reel, 3000 - $0.60 Y  Material Info PCN Purchase Sample
    ADP2108ACBZ-1.5-R7 Status: Production CHIPS W/SOLDER BUMPS/WLCSP 5 Ind Reel, 3000 - $0.60 Y  Material Info PCN Purchase Sample
    ADP2108ACBZ-1.8-R7 Status: Production CHIPS W/SOLDER BUMPS/WLCSP 5 Ind Reel, 3000 - $0.60 Y  Material Info PCN Purchase Sample
    ADP2108ACBZ-1.82R7 Status: Production CHIPS W/SOLDER BUMPS/WLCSP 5 Ind Reel, 3000 - $0.60 Y  Material Info PCN Purchase Sample
    ADP2108ACBZ-2.3-R7 Status: Production CHIPS W/SOLDER BUMPS/WLCSP 5 Ind Reel, 3000 - $0.60 Y  Material Info PCN Purchase Sample
    ADP2108ACBZ-2.5-R7 Status: Production CHIPS W/SOLDER BUMPS/WLCSP 5 Ind Reel, 3000 - $0.60 Y  Material Info PCN Purchase Sample
    ADP2108ACBZ-3.0-R7 Status: Production CHIPS W/SOLDER BUMPS/WLCSP 5 Ind Reel, 3000 - $0.60 Y  Material Info PCN Purchase Sample
    ADP2108ACBZ-3.3-R7 Status: Production CHIPS W/SOLDER BUMPS/WLCSP 5 Ind Reel, 3000 - $0.60 Y  Material Info PCN Purchase Sample
    ADP2108AUJZ-1.0-R7 Status: Production 5 ld TSOT 5 Ind Reel, 3000 - $0.60 Y  Material Info PCN Purchase Sample
    ADP2108AUJZ-1.1-R7 Status: Production 5 ld TSOT 5 Ind Reel, 3000 - $0.60 Y  Material Info PCN Purchase Sample
    ADP2108AUJZ-1.2-R7 Status: Production 5 ld TSOT 5 Ind Reel, 3000 - $0.60 Y  Material Info PCN Purchase Sample
    ADP2108AUJZ-1.3-R7 Status: Production 5 ld TSOT 5 Ind Reel, 3000 - $0.60 Y  Material Info PCN Purchase Sample
    ADP2108AUJZ-1.5-R7 Status: Production 5 ld TSOT 5 Ind Reel, 3000 - $0.60 Y  Material Info PCN Purchase Sample
    ADP2108AUJZ-1.8-R7 Status: Production 5 ld TSOT 5 Ind Reel, 3000 - $0.60 Y  Material Info PCN Purchase Sample
    ADP2108AUJZ-1.82R7 Status: Production 5 ld TSOT 5 Ind Reel, 3000 - $0.60 Y  Material Info PCN Purchase Sample
    ADP2108AUJZ-2.3-R7 Status: Production 5 ld TSOT 5 Ind Reel, 3000 - $0.60 Y  Material Info PCN Purchase Sample
    ADP2108AUJZ-2.5-R7 Status: Production 5 ld TSOT 5 Ind Reel, 3000 - $0.60 Y  Material Info PCN Purchase Sample
    ADP2108AUJZ-3.0-R7 Status: Production 5 ld TSOT 5 Ind Reel, 3000 - $0.60 Y  Material Info PCN Purchase Sample
    ADP2108AUJZ-3.3-R7 Status: Production 5 ld TSOT 5 Ind Reel, 3000 - $0.60 Y  Material Info PCN Purchase Sample
    Price Table Help

    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.

    ADP2108 Evaluation Board
    Model Description Price RoHS View PCN/ PDN Check Inventory/
    Purchase/Sample
    ADP2108-1.0-EVALZ Status: Production Evaluation Board - Yes -
    ADP2108-1.1-EVALZ Status: Production Evaluation Board $60.00 Yes -
    ADP2108-1.2-EVALZ Status: Production Evaluation Board $60.00 Yes -
    ADP2108-1.3-EVALZ Status: Production Evaluation Board $60.00 Yes -
    ADP2108-1.5-EVALZ Status: Production Evaluation Board $60.00 Yes -
    ADP2108-1.82-EVALZ Status: Production Evaluation Board $60.00 Yes -
    ADP2108-1.8-EVALZ Status: Production Evaluation Board $60.00 Yes -
    ADP2108-2.3-EVALZ Status: Production Evaluation Board $60.00 Yes -
    ADP2108-2.5-EVALZ Status: Production Evaluation Board $60.00 Yes -
    ADP2108-3.0-EVALZ Status: Production Evaluation Board $60.00 Yes -
    ADP2108-3.3-EVALZ Status: Production Evaluation Board $60.00 Yes -
    ADP2108UJZ-REDYKIT Status: Production Evaluation Board $120.00 Yes -

    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.

    Check Inventory & Purchase

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