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ADP1740:  2 A, LOW VIN DROPOUT, LINEAR REGULATOR

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 ...More

ADP1740:  2 A, LOW VIN DROPOUT, LINEAR REGULATOR

Product Description

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

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    • 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
    • Product Description: 2 A, Low Dropout, CMOS Linear Regulator
    • Vout Preset (V): 7 Options 0.75V to 2.5V
    • Vout Adj Range: n/a
    • Vin Range (Vmin to Vmax): 1.6 to 3.6
    • Iout (max): 2A
    • Supply Current : 1.8mA
    • Vdropout @ Rated Iout: 350mV
    • Vout Total Acc: 2% @ 1 mA - Iout max
    • Package: LFCSP-16
    • # of Outputs: 1
    • Shutdown: Yes
    • Operating Temp Range: -40 to +125

    Typical Application Circuit for ADP1740

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    *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.
    **Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.