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Overview

Features and Benefits

  • 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 3.3 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
  • See data sheet for additional features

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 seven fixed output voltage options. The ADP1741 is an adjustable version that allows output voltages ranging from 0.75 V to 3.3 V via an external divider.The ADP1740 / ADP1741 allow an external soft start capacitor to be connected to program the startup. A digital power-good output allows power system monitors to check the health of the output 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 that require 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

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits (6)

Documentation & Resources

  • View All (12)
  • Evaluation Design File (1)
  • Data Sheet (1)
  • Application Note (2)
  • Frequently Asked Question (1)
  • Solutions Bulletin & Brochure (2)
  • Circuit Note (1)
  • Video (1)
  • Technical Article (3)
  • Tools & Simulations

    LTspice

    LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

    LTspice

    Models for the following parts are available in LTspice:

    ADP1741

    Design Tool

    ADI Linear Regulator Design Tool and Parametric Search

    Microsoft Excel download tool from ADIsimPower to generate a power supply design complete with a schematic, bill of materials, and performance specifications.

    Reference Designs (1)

    Design Resources

    ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.

    Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
    ADP1741ACPZ-R7 Material Declaration Reliability Data 16-Lead LFCSP (4mm x 4mm w/ EP)
    Wafer Fabrication Data

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