LT3083 - Adjustable 3A Single Resistor Low Dropout Regulator

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

Typical Application

LT3083 Typical Application
LT3083 Typical Application

Description

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.

Packaging

For complete and up to date package information and drawings, please refer to our packaging page

TSSOP-16, DFN-12, TO-220, DDPAK

LT3083 Package Drawing
LT3083 Package Drawing
LT3083 Package Drawing
LT3083 Package Drawing

Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price (1-99) Price (1k)* RoHS Data
LT3083EDF#PBF DFN 12 E $5.43 $3.80 View
LT3083EDF#TRPBF DFN 12 E $3.86 View
LT3083EFE#PBF TSSOP 16 E $5.62 $3.93 View
LT3083EFE#TRPBF TSSOP 16 E $3.99 View
LT3083EQ#PBF DD PAK 5 E $5.90 $4.13 View
LT3083EQ#TRPBF DD PAK 5 E $4.19 View
LT3083ET#PBF TO-220 5 E $5.90 $4.13 View
LT3083ET#TRPBF TO-220 5 E $4.19 View
LT3083IDF#PBF DFN 12 I $6.29 $4.40 View
LT3083IDF#TRPBF DFN 12 I $4.46 View
LT3083IFE#PBF TSSOP 16 I $6.47 $4.53 View
LT3083IFE#TRPBF TSSOP 16 I $4.59 View
LT3083IQ#PBF DD PAK 5 I $6.76 $4.73 View
LT3083IQ#TRPBF DD PAK 5 I $4.79 View
LT3083IT#40PBF 5 I $7.21 $5.18 View
LT3083IT#PBF TO-220 5 I $6.76 $4.73 View
LT3083IT#TRPBF TO-220 5 I $4.79 View
LT3083MPDF#PBF DFN 12 MP $14.66 $10.26 View
LT3083MPDF#TRPBF DFN 12 MP $10.32 View
LT3083MPFE TSSOP 16 MP $15.17 $10.62 View
LT3083MPFE#PBF TSSOP 16 MP $15.17 $10.62 View
LT3083MPFE#TRPBF TSSOP 16 MP $10.68 View
LT3083MPQ#PBF DD PAK 5 MP $15.94 $11.16 View
LT3083MPQ#TRPBF DD PAK 5 MP $11.22 View
LT3083MPT#PBF TO-220 5 MP $15.94 $11.16 View
LT3083MPT#TRPBF TO-220 5 MP $11.22 View
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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 Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Part Number Description Price Documentation
DC1585A LT3083EQ Demo Board. $175.00
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Click here to view our complete list of demo boards

Applications

  • High Current All Surface Mount Supply
  • High Efficiency Linear Regulator
  • Post Regulator for Switching Supplies
  • Low Parts Count Variable Voltage Supply
  • Low Output Voltage Power Supplies

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Design Tools

LTspiceIV

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Models for the following parts are available in LTspice IV:
LT3083

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