LT3080 - Adjustable 1.1A Single Resistor Low Dropout Regulator

Features

  • Outputs May be Paralleled for Higher Current and Heat Spreading
  • Output Current: 1.1A
  • Single Resistor Programs Output Voltage
  • 1% Initial Accuracy of SET Pin Current
  • Output Adjustable to 0V
  • Low Output Noise: 40μVRMS (10Hz to 100kHz)
  • Wide Input Voltage Range: 1.2V to 36V
  • Low Dropout Voltage: 350mV (Except SOT-223 Package)
  • <1mV Load Regulation
  • <0.001%/V Line Regulation
  • Minimum Load Current: 0.5mA
  • Stable with 2.2μF Minimum Ceramic Output Capacitor
  • Current Limit with Foldback and Overtemperature Protected
  • Available in 8-Lead MSOP, 3mm × 3mm DFN, 5-Lead DD-Pak, TO-220 and 3-Lead SOT-223

Typical Application

LT3080 Typical Application
LT3080 Typical Application

Description

The LT3080 is a 1.1A low dropout linear regulator that can be paralleled to increase output current or spread heat in surface mounted boards. Architected as a precision current source and voltage follower allows this new regulator to be used in many applications requiring high current, adjustability to zero, and no heat sink. Also the device brings out the collector of the pass transistor to allow low dropout operation —down to 350 millivolts— when used with multiple supplies.

A key feature of the LT3080 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 36V. The LT3080 is stable with 2.2μF of capacitance on the output, and the IC uses 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 LT3080 regulator is offered in the 8-lead MSOP (with an exposed pad for better thermal characteristics), a 3mm × 3mm DFN, 5-lead DD-Pak, TO-220 and a simple-to-use 3-lead SOT-223 version.

  Features
LT3080 -
LT3080-1 Can parallel without additional external resistance

Packaging

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

MS-8, DFN-8, TO-220, SOT-223

LT3080 Package Drawing
LT3080 Package Drawing
LT3080 Package Drawing
LT3080 Package Drawing
LT3080 Package Drawing

Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price (1-99) Price (1k)* RoHS Data
LT3080EDD#PBF DFN 8 E $2.69 $1.88 View
LT3080EDD#TRPBF DFN 8 E $1.94 View
LT3080EDD-1 DFN 8 E View
LT3080EDD-1#PBF DFN 8 E $2.69 $1.88 View
LT3080EDD-1#TRPBF DFN 8 E $1.94 View
LT3080EMS8E MSOP 8 E $2.77 $1.94 View
LT3080EMS8E#PBF MSOP 8 E $2.77 $1.94 View
LT3080EMS8E#TRPBF MSOP 8 E $2.00 View
LT3080EMS8E-1#PBF MSOP 8 E $2.77 $1.94 View
LT3080EMS8E-1#TRPBF MSOP 8 E $2.00 View
LT3080EQ DD PAK 5 E $3.14 $2.20 View
LT3080EQ#PBF DD PAK 5 E $3.14 $2.20 View
LT3080EQ#TRPBF DD PAK 5 E $2.32 View
LT3080EST SOT-223 3 E $2.59 $1.81 View
LT3080EST#PBF SOT-223 3 E $2.59 $1.81 View
LT3080EST#TRPBF SOT-223 3 E $1.87 View
LT3080ET#31PBF TO-220 5 E $3.50 $2.60 View
LT3080ET#PBF TO-220 5 E $3.14 $2.20 View
LT3080IDD#PBF DFN 8 I $3.09 $2.16 View
LT3080IDD#TRPBF DFN 8 I $2.21 View
LT3080IDD-1 DFN 8 I $3.09 $2.16 View
LT3080IDD-1#PBF DFN 8 I $3.09 $2.16 View
LT3080IDD-1#TRPBF DFN 8 I $2.21 View
LT3080IMS8E#PBF MSOP 8 I $3.19 $2.23 View
LT3080IMS8E#TRPBF MSOP 8 I $2.29 View
LT3080IMS8E-1#PBF MSOP 8 I $3.19 $2.23 View
LT3080IMS8E-1#TRPBF MSOP 8 I $2.29 View
LT3080IQ#PBF DD PAK 8 I $3.62 $2.53 View
LT3080IQ#TRPBF DD PAK 8 I $2.59 View
LT3080IST#PBF SOT-223 8 I $2.97 $2.08 View
LT3080IST#TRPBF SOT-223 8 I $2.14 View
LT3080IT#PBF TO-220 5 I $3.62 $2.53 View
LT3080IT#TRPBF 5 I $2.59 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
DC1294A LT3080EDD Demo Board | LT3080(x4), Paralleled, Single Resistor LDOs, 3.8V ≤ VIN ≤ 25V, Vout = 3.3V @ 4.4A. $150.00
DC995A LT3080EDD Demo Board | 1.1A Adjustable, Single Resistor Linear Regulator, 2.3V ≤ VIN ≤ 25V, Vout = 0.6/1.0/1.2/1.5/1.8/2.5/3.3/5V @ 1.1A. $75.00
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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

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LT3080
LT3080-1

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