LT3083
Info : RECOMMENDED FOR NEW DESIGNS
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LT3083

Adjustable 3A Single Resistor Low Dropout Regulator

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Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 22
1ku List Price Starting From $4.55
Features
  • Outputs May be Paralleled for Higher Current and Heat Spreading
  • Output Current: 3A
  • Single Resistor Programs Output Voltage
  • 50µA Set Pin Current: 1% Initial Accuracy
  • Output Adjustable to 0V
  • Low Output Noise: 40µVRMS (10Hz to 100kHz)
  • Wide Input Voltage Range: 1.2V to 23V (DD-Pak and TO-220 Packages)
  • Low Dropout Voltage: 310mV
  • <1mV Load Regulation
  • <0.001%/V Line Regulation
  • Minimum Load Current: 1mA
  • Stable with Minimum 10µF Ceramic Capacitor
  • Current Limit with Foldback and Overtemperature Protection
  • Available in 16-Lead TSSOP, 12-Lead 4mm × 4mm DFN, 5-Lead TO-220 and 5-Lead Surface Mount DD-PAK Packages
Additional Details
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The LT3083 is a 3A low dropout linear regulator that can be paralleled to increase output current or spread heat on surface mounted boards. Architected as a precision current source and voltage follower, this new regulator finds use in many applications requiring high current, adjustability to zero, and no heat sink. The device also brings out the collector of the pass transistor to allow low dropout operation—down to 310mV—when used with multiple supplies.

A key feature of the LT3083 is the capability to supply a wide output voltage range. By using a reference current through a single resistor, the output voltage is programmed to any level between zero and 23V (DD-PAK and TO-220 packages). The LT3083 is stable with 10μF of capacitance on the output, and the IC is stable with small ceramic capacitors that do not require additional ESR as is common with other regulators.

Internal protection circuitry includes current limiting and thermal limiting. The LT3083 is offered in the 16-lead TSSOP (with an exposed pad for better thermal characteristics), 12-lead 4mm × 4mm DFN (also with an exposed pad), 5-lead TO-220, and 5-lead surface mount DD-PAK packages.

Applications

  • High Efficiency Linear Regulator
  • Post Regulator for Switching Supplies
  • Low Parts Count Variable Voltage Supply
  • Low Output Voltage Power Supplies
Part Models 22
1ku List Price Starting From $4.55

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Documentation

Documentation

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Apr 6, 2022

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Aug 10, 2022

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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

reference details image

DC1585A

LT3083EQ Demo Board | Single Resistor Prog Low Dropout Linear Regulator, 1.7V ≤ VIN ≤ 23V, VOUT = 1.2V/1.5V/1.8V/2.5V/3.3V/5.0V @ 3A

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DC1585A

LT3083EQ Demo Board | Single Resistor Prog Low Dropout Linear Regulator, 1.7V ≤ VIN ≤ 23V, VOUT = 1.2V/1.5V/1.8V/2.5V/3.3V/5.0V @ 3A

LT3083EQ Demo Board | Single Resistor Prog Low Dropout Linear Regulator, 1.7V ≤ VIN ≤ 23V, VOUT = 1.2V/1.5V/1.8V/2.5V/3.3V/5.0V @ 3A

Product Detail

Demonstration circuit 1585A is an adjustable 3A linear regulator featuring the LT3083 in the DD-PAK-5 package. Architected as a precision current source and voltage follower, the LT3083 can be used in many applications requiring high current, adjustability to zero output, and no heat sink. Internal protection circuitry includes current limiting and thermal limiting.The device brings out the collector of the pass transistor to allow low dropout operation when used with multiple supplies.


The demo board oprerates with an input supply voltage range of 1.7V to 23V. A control voltage bias supply that is 1.2V to 1.4V higher than the input voltage is required for proper regulation. A key feature of the LT3083 is its wide output voltage range. The DC1585A's jumper-selectable output voltage can be set to 1.2V, 1.5V, 1.8V, 2.5V, 3.3V, 5.0V, or a user-selectable value. DC1585A can be used as a high current linear regulator, a post regulator for switching supplies, a variable voltage supply or a low output voltage power supply.

Tools & Simulations

Tools & Simulations 1

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.

Reference Designs

Reference Designs 3

DK-DEV-5SGXEA7N Dev Kit

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altera-stratix-v-gx-fpga-development-kit

altera-stratix-v-gx-fpga-development-kit

Circuits from the lab

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Features and Benefits

  • Analog Devices has worked closely with FPGA and processor manufacturers to develop verified power solutions that optimize cost, size and efficiency in high performance applications
  • Our reference designs are supported by an intuitive design tool set and IP
  • Our team can provide designs for quick prototypes that can speed time to market in the most complex applications
View Detailed Reference Design external link
Stratix V Advanced System Development Board

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stratix-v-advanced-system-development-board

stratix-v-advanced-system-development-board

Circuits from the lab

tooltip Info:Circuits from the lab

Features and Benefits

  • Analog Devices has worked closely with FPGA and processor manufacturers to develop verified power solutions that optimize cost, size and efficiency in high performance applications
  • Our reference designs are supported by an intuitive design tool set and IP
  • Our team can provide designs for quick prototypes that can speed time to market in the most complex applications
View Detailed Reference Design external link
Terasic DE2i-150 Cyclone IV Board

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terasic-de2i-150-cyclone-iv-board

terasic-de2i-150-cyclone-iv-board

Circuits from the lab

tooltip Info:Circuits from the lab

Features and Benefits

  • Analog Devices has worked closely with FPGA and processor manufacturers to develop verified power solutions that optimize cost, size and efficiency in high performance applications
  • Our reference designs are supported by an intuitive design tool set and IP
  • Our team can provide designs for quick prototypes that can speed time to market in the most complex applications
View Detailed Reference Design external link

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