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ADP1708:  1 A, Low Dropout, CMOS Linear Regulator

Product Status:Production
Data
Sheet
ADP1708 Data Sheet Rev 0, 07/2007 (pdf 555kB)

Product Details

Product Status:Production
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The ADP1706/ADP1707/ADP1708 are CMOS, low dropout linear regulators that operate from 2.5 V to 5.5 V and provide up to 1 A of output current. Using an advanced proprietary architecture, they provide high power supply rejection and achieve excellent line and load transient response with a small 4.7 μF ceramic output capacitor.

The ADP1706/ADP1707 are available in 16 fixed output volt-age options. The ADP1708 is available in an adjustable version, which allows output voltages that range from 0.8 V to 5.0 V via an external divider. The ADP1706 allows an external soft start capacitor to be connected to program the start-up time; the ADP1707 and ADP1708 contain internal soft start capacitors that give a typical start-up time of 100 μs. The ADP1707 includes a tracking feature that allows the output to follow an external voltage rail or reference.

The ADP1706/ADP1707/ADP1708 are available in an 8-lead, exposed paddle SOIC package and an 8-lead, 3 mm × 3 mm exposed paddle LFCSP, making them not only very compact solutions but also providing excellent thermal performance for applications requiring up to 1 A of output current in a small, low profile footprint.

Applications

  • Notebook computers
  • Memory components
  • Telecommunications equipment
  • Network equipment
  • DSP/FPGA/microprocessor supplies
  • Instrumentation equipment/data acquisition systems

    • Data Sheet, Rev. 0, 7/07

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    FEATURES and BENEFITS

    • Maximum output current: 1 A
    • Input voltage range: 2.5 V to 5.5 V
    • Low shutdown current: <1 μA
    • Low dropout voltage: 345 mV @ 1 A load
    • Initial accuracy: ±1%
    • Accuracy over line, load, and temperature: ±2.5%
    • 16 fixed output voltage options with soft start: 0.75 V to 3.3 V (ADP1706)
    • 16 fixed output voltage options with tracking 0.75 V to 3.3 V (ADP1707)
    • Adjustable output voltage option: 0.8 V to 5.0 V (ADP1708)
    • Stable with small 4.7 μF ceramic output capacitor
    • Excellent load/line transient response
    • Current limit and thermal overload protection

    Typical Application Circuit for ADP1708

    Typical Application Circuit for ADP1708
    Typical Applications and Other Diagrams

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    Documentation

    Title Content Type File Type
    ADP1706/ADP1707/ADP1708: 1 A, Low Dropout, CMOS Linear Regulator Data Sheet (Rev 0, 07/2007) (pdf, 555 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
    The Fundamentals of LDO Design and Applications Technical Articles HTML
    Powering High Speed Analog-to-Digital Converters with Switching Power Supplies  (pdf, 2478 kB)
    This article demonstrates that analog-to-digital converters can be powered directly from switching power supplies with no loss in performance if careful design practice is followed.
    (Power Management DesignLine, May 2009)     		Technical Articles PDF
    Analog Devices’ 256-Channel, 16-Bit Digital X-Ray Analog Front End Delivers Industry’s Best Combination of Noise, Power and Image Quality (27 Nov 2012) Press Releases HTML
    RAQs index Rarely Asked Questions HTML
    What are LDOs and how are they used? FAQs/RAQs HTML
    Glossary of EE Terms Glossary HTML

    Design Tools,Models,Drivers & Software

    Title Content Type File Type
    Download files for ADIsimPower™ Voltage Regulator Design Tool
    The individual Excel-based voltage regulator design tools used in ADIsimPower™.     		ADIsim Design/Simulation Tools HTML
    Enter values and click on ADIsimPower to find power management solutions. Launch of ADIsimPower Voltage Regulator Design Tool
    Available System Voltage Operating Voltage Rail Load Current
    Vin (min) V Vin (max) V Vout 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.

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    Price, packaging, availability

    ADP1708 Model Options
    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.

    ADP1708 Evaluation Board
    Model Description Price RoHS View PCN/ PDN Check Inventory/
    Purchase/Sample
    ADP1708-EVALZ Status: Production Evaluation Board $60.72 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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