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ADP1740:  2 A, Low VIN Dropout, Linear Regulator

Product Details


The ADP1740/ADP1741 are CMOS, low dropout linear regulators that operate from 1.6 V to 3.6 V and provide up to 2 A of output current. These low VIN / VOUT LDOs are ideal for regulation of nanometer FPGA geometries operating from 2.5V down to 1.8V I/O rails, and powering core voltages down to 0.75V. Using an advanced, proprietary architecture, the ADP1740/ ADP1741 provide high power supply rejection ratio (PSRR) and low noise, and achieve excellent line and load transient response with only a small 4.7 μF ceramic output capacitor.

The ADP1740 is available in 7 fixed output voltage options. The ADP1741 is available in an adjustable version, which allows output voltages that range from 0.75 V to 3.0 V via an external divider. The ADP1740/ADP1741 allow an external soft start capacitor to be connected to program the start-up.

A power good output allows power system monitors to digitally check the health of the output power rail voltage. The ADP1740/ADP1741 are available in a 16-lead, 4 mm × 4 mm LFCSP, making them not only very compact solutions, but also providing excellent thermal performance for applications requiring up to 2 A of output current in a small, low profile footprint.

Applications

  • Server computers
  • Memory components
  • Telecommunications equipment
  • Network equipment
  • DSP/FPGA/microprocessor supplies
  • Instrumentation equipment/data acquisition systems
  • FEATURES and BENEFITS

    • Chinese data sheet available
    • Maximum output current: 2 A
    • Input voltage range: 1.6 V to 3.6 V
    • Low shutdown current: 2 μA
    • Low dropout voltage: 160 mV @ 2 A load
    • Initial accuracy: ±1%
    • Accuracy over line, load, and temperature: ±2%
    • 7 fixed output voltage options with soft start:
      0.75 V to 2.5 V (ADP1740)
    • Adjustable output voltage options with soft start: 0.75 V to 3.0 V (ADP1741)
    • High PSRR
      65 dB @ 1 kHz
      65 dB @ 10 kHz
      54 dB @ 100 kHz
    • 23 μV rms at 0.75 V output
    • Stable with small 4.7 μF ceramic output capacitor
    • Please see data sheet for additional features

    Typical Application Circuit Diagram for ADP1740

    Documentation

    Title Content Type File Type
    ADP1740/ADP1741: 2 A, Low VIN, Low Dropout Linear Regulator Data Sheet (Rev G, 04/2014) (pdf, 777 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
    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
    The Fundamentals of LDO Design and Applications Technical Articles HTML
    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
    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.

    SampleSample & Buy

    Price, packaging, availability

    ADP1740 Model Options
    Model Package Pins Temp.
    Range
    Packing,
    Qty
    Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
    Purchase/Sample
    ADP1740ACPZ-0.75R7 Status: Production 16 ld LFCSP (4x4mm, 2.50mm exposed pad) 16 Ind Reel, 1500 - $1.20 Y  Material Info PCN Purchase Sample
    ADP1740ACPZ-1.0-R7 Status: Production 16 ld LFCSP (4x4mm, 2.50mm exposed pad) 16 Ind Reel, 1500 - $1.20 Y  Material Info PCN Purchase Sample
    ADP1740ACPZ-1.1-R7 Status: Production 16 ld LFCSP (4x4mm, 2.50mm exposed pad) 16 Ind Reel, 1500 - $1.20 Y  Material Info PCN Purchase Sample
    ADP1740ACPZ-1.2-R7 Status: Production 16 ld LFCSP (4x4mm, 2.50mm exposed pad) 16 Ind Reel, 1500 - $1.20 Y  Material Info PCN Purchase Sample
    ADP1740ACPZ-1.3-R7 Status: Production 16 ld LFCSP (4x4mm, 2.50mm exposed pad) 16 Ind Reel, 1500 - $1.20 Y  Material Info Notify Me Purchase Sample
    ADP1740ACPZ-1.5-R7 Status: Production 16 ld LFCSP (4x4mm, 2.50mm exposed pad) 16 Ind Reel, 1500 - $1.20 Y  Material Info PCN Purchase Sample
    ADP1740ACPZ-1.8-R7 Status: Production 16 ld LFCSP (4x4mm, 2.50mm exposed pad) 16 Ind Reel, 1500 - $1.20 Y  Material Info PCN Purchase Sample
    ADP1740ACPZ-2.5-R7 Status: Production 16 ld LFCSP (4x4mm, 2.50mm exposed pad) 16 Ind Reel, 1500 - $1.20 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.

    ADP1740 Evaluation Board
    Model Description Price RoHS View PCN/ PDN Check Inventory/
    Purchase/Sample
    ADP1740-1.5-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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