Overview

Features and Benefits

  • Optimized for Fast Transient Response
  • Output Current: 3A
  • Dropout Voltage: 340mV at 3A
  • Low Noise: 40µVRMS (10Hz to 100kHz)
  • 1mA Quiescent Current
  • Wide Input Voltage Range: 2.7V to 20V
  • No Protection Diodes Needed
  • Controlled Quiescent Current in Dropout
  • Fixed Output Voltages: 1.5V, 1.8V, 2.5V, 3.3V
  • Adjustable Output from 1.21V to 20V
  • <1µA Quiescent Current in Shutdown
  • Stable with 10µF Output Capacitor
  • Reverse Battery Protection
  • No Reverse Current
  • Thermal Limiting

Product Details

The LT1764A is a low dropout regulator optimized for fast transient response. The device is capable of supplying 3A of output current with a dropout voltage of 340mV. Operating quiescent current is 1mA, dropping to <1µA in shutdown. Quiescent current is well controlled; it does not rise in dropout as it does with many other regulators. In addition to fast transient response, the LT1764A has very low output voltage noise which makes the device ideal for sensitive RF supply applications.

Output voltage range is from 1.21V to 20V. The LT1764A regulators are stable with output capacitors as low as 10µF. Internal protection circuitry includes reverse battery protection, current limiting, thermal limiting and reverse current protection. The device is available in fixed output voltages of 1.5V, 1.8V, 2.5V, 3.3V and as an adjustable device with a 1.21V reference voltage. The LT1764A regulators are available in 5-lead TO-220 and DD packages, and 16-lead FE packages.

Features
LT1764 -
LT1764A Stable With Ceramic Output Capacitors

Applications

  • 3.3V to 2.5V Logic Power Supply
  • Post Regulator for Switching Supplies

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.

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.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.

LTspice

Models for the following parts are available in LTspice:

LT1764
lt1764-1
LT1764-1.5
LT1764-1.8
lt1764-2
LT1764-2.5
lt1764-3
LT1764-3.3
LT1764A
lt1764a-1
LT1764A-1.5
LT1764A-1.8
lt1764a-2
LT1764A-2.5
lt1764a-3
LT1764A-3.3

Product Recommendations

LT1764A Companion Parts

Recommended Related Parts

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.

Discussions

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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.


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