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ADP1741:  2 A, Low VIN, Dropout, CMOS 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, they provide high power supply rejection, low noise, and achieve excellent line and load transient response with just 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 allows 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

  • Notebook 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 (ADP1740): 0.75 V to 2.5 V
  • Adjustable output voltage options with soft start (ADP1741): 0.75 V to 3.0 V
  • 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
  • Excellent load and line transient response
  • Current-limit and thermal overload protection

Typical Application Circuit Diagram for ADP1741

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-1329: Noise Reduction Network for Adjustable Low Dropout Regulators  (pdf, 486 kB) Application Notes 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
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.

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Price, packaging, availability

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.

ADP1741 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
ADP1741-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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