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ADP2503:  600 mA, 2.5 MHz Buck-Boost DC-to-DC Converter

Product Details


The ADP2503/ADP2504 are high efficiency, low quiescent current step-up/step-down dc-to-dc converters that can operate at input voltages greater than, less than, or equal to the regulated output voltage. The power switches and synchronous rectifiers are internal to minimize external part count. At high load currents, the ADP2503/ADP2504 use a current-mode, fixed frequency pulse-width modulation (PWM) control scheme for optimal stability and transient response. To ensure the longest battery life in portable applications, the ADP2503/ADP2504 have an optional power save mode that reduces the switching frequency under light load conditions. For wireless and other low noise applications where variable frequency power save mode may cause interference, the logic control input sync forces fixed frequency PWM operation under all load conditions.

The ADP2503/ADP2504 can run from input voltages between 2.3 V and 5.5 V, allowing single lithium or lithium polymer cell, multiple alkaline or NiMH cells, PCMCIA, USB, and other standard power sources. The ADP2503/ADP2504 have fixed output options, or using the adjustable model, the output voltage can be programmed through an external resistor divider. Compensation is internal to minimize the number of external components.

During logic-controlled shutdown, the input is disconnected from the output and draws less than 1 μA from the input source. Operating as boost converters, the ADP2503/ADP2504 feature a true load disconnect function that isolates the load from the power source. Other key features include undervoltage lockout to prevent deep battery discharge, and soft start to prevent input current overshoot at startup.

Applications

  • Wireless handsets
  • Digital cameras/portable audio players
  • Miniature hard disk power supplies
  • USB powered devices
  • Data Sheet, Rev. A, 08/09

    FEATURES and BENEFITS

    • 2.5 MHz operation enables 1.5 μH inductor
    • Input voltage: 2.3 V to 5.5 V
    • Fixed output voltage: 2.8 V to 5.0 V
    • See data sheet for additional features

    ADP2503 Typical Application Circuit

    Documentation

    Title Content Type File Type
    ADP2503/ADP2504: 600 mA/1000 mA, 2.5 MHz Buck-Boost DC-to-DC Converters Data Sheet (Rev C, 08/2013) (pdf, 1623 kB) Data Sheets PDF
    AN-1149: How to Apply DC-to-DC Step-Down/Step-Up (Buck/Boost) Regulators  (pdf, 172 kB) Application Notes PDF
    CN-0234: Single Supply, Micropower Toxic Gas Detector Using an Electrochemical Sensor  (pdf, 386 kB) Circuit Note PDF
    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-060: Evaluation Board for the ADP2503/ADP2504, 600 mA/1000 mA, 2.5 MHz Buck-Boost DC-to-DC Converters  (pdf, 986 kB) User Guides PDF
    UG-028: RedyKit™ for the ADP2503 Buck-Boost Converter  (pdf, 191 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
    RAQs index Rarely Asked Questions HTML
    Glossary of EE Terms Glossary HTML

    Design Tools,Models,Drivers & Software

    Title Content Type File Type
    ADP2503/4 Buck Boost 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
    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

    ADP2503 Model Options
    Model Package Pins Temp.
    Range
    Packing,
    Qty
    Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
    Purchase/Sample
    ADP2503ACPZ-2.8-R7 Status: Production 10 ld LFCSP (3x3mm) 10 Ind Reel, 1500 - $1.30 Y  Material Info PCN Purchase Sample
    ADP2503ACPZ-3.3-R7 Status: Production 10 ld LFCSP (3x3mm) 10 Ind Reel, 1500 - $1.30 Y  Material Info PCN Purchase Sample
    ADP2503ACPZ-3.5-R7 Status: Production 10 ld LFCSP (3x3mm) 10 Ind Reel, 1500 - $1.30 Y  Material Info PCN Purchase Sample
    ADP2503ACPZ-4.2-R7 Status: Production 10 ld LFCSP (3x3mm) 10 Ind Reel, 1500 - $1.30 Y  Material Info PCN Purchase Sample
    ADP2503ACPZ-4.5-R7 Status: Production 10 ld LFCSP (3x3mm) 10 Ind Reel, 1500 - $1.30 Y  Material Info PCN Purchase Sample
    ADP2503ACPZ-5.0-R7 Status: Production 10 ld LFCSP (3x3mm) 10 Ind Reel, 1500 - $1.30 Y  Material Info PCN Purchase Sample
    ADP2503ACPZ-R7 Status: Production 10 ld LFCSP (3x3mm) 10 Ind Reel, 1500 - $1.30 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.

    ADP2503 Evaluation Board
    Model Description Price RoHS View PCN/ PDN Check Inventory/
    Purchase/Sample
    ADP2503CPZ-REDYKIT Status: Production Evaluation Board $120.00 Yes -
    ADP2503-EVALZ Status: Production Evaluation Board $60.00 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.

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