LT3088 - 800mA Single Resistor Rugged Linear Regulator

Features

  • Extended Safe Operating Area
  • Maximum Output Current: 800mA
  • Stable with or without Input/Output Capacitors
  • Wide Input Voltage Range: 1.2V to 36V
  • Single Resistor Sets Output Voltage
  • Output Adjustable to 0V
  • 50μA SET Pin Current: 1% Initial Accuracy
  • Output Voltage Noise: 27μVRMS
  • Parallel Multiple Devices for Higher Current, Heat Spreading and Lower Noise
  • Pin Compatible Upgrade to LT1117
  • Reverse-Battery and Reverse-Current Protection
  • <1mV Typical Load Regulation Independent of VOUT
  • <0.001%/V Typical Line Regulation
  • 3-Lead SOT-223, 3-Lead DD-Pak, 8-Lead 3mm × 3mm DFN Packages

Typical Application

LT3088 Typical Application
LT3088 Typical Application

Description

The LT®3088 is an 800mA low dropout linear regulator designed for rugged industrial applications. A key feature of the IC is the extended safe operating area (SOA). The LT3088 can be paralleled for higher output current or heat spreading. The device withstands reverse input and reverse output-to-input voltages without reverse current flow.

The LT3088’s precision 50μA reference current source allows a single resistor to program output voltage to any level between zero and 34.5V. The current reference architecture makes load regulation independent of output voltage. The LT3088 is stable with or without input and output capacitors.

Internal protection circuitry includes reverse-battery and reverse-current protection, current limiting and thermal limiting. The LT3088 is offered in the 3-lead SOT-223, 3-lead DD-Pak, and an 8-lead 3mm × 3mm DFN package.

Packaging

CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

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

Part Number Package Code Temp Package
Drawing
RoHS
LT3088EDD#PBF 3x3 DFN-8 DD E 05-08-1698 Yes
LT3088EDD#TRPBF 3x3 DFN-8 DD E 05-08-1698 Yes
LT3088EM#PBF DDPAK-3 M E 05-08-1460 Yes
LT3088EM#TRPBF DDPAK-3 M E 05-08-1460 Yes
LT3088EST#PBF SOT-223 ST E 05-08-1630 Yes
LT3088EST#TRPBF SOT-223 ST E 05-08-1630 Yes
LT3088HDD#PBF 3x3 DFN-8 DD H 05-08-1698 Yes
LT3088HDD#TRPBF 3x3 DFN-8 DD H 05-08-1698 Yes
LT3088HM#PBF DDPAK-3 M H 05-08-1460 Yes
LT3088HM#TRPBF DDPAK-3 M H 05-08-1460 Yes
LT3088HST#PBF SOT-223 ST H 05-08-1630 Yes
LT3088HST#TRPBF SOT-223 ST H 05-08-1630 Yes
LT3088IDD#PBF 3x3 DFN-8 DD I 05-08-1698 Yes
LT3088IDD#TRPBF 3x3 DFN-8 DD I 05-08-1698 Yes
LT3088IM#PBF DDPAK-3 M I 05-08-1460 Yes
LT3088IM#TRPBF DDPAK-3 M I 05-08-1460 Yes
LT3088IST#PBF SOT-223 ST I 05-08-1630 Yes
LT3088IST#TRPBF SOT-223 ST I 05-08-1630 Yes
LT3088MPM DDPAK-3 M MP 05-08-1460 No
LT3088MPM#PBF DDPAK-3 M MP 05-08-1460 Yes
LT3088MPM#TRPBF DDPAK-3 M MP 05-08-1460 Yes
LT3088MPST#PBF SOT-223 ST MP 05-08-1630 Yes
LT3088MPST#TRPBF SOT-223 ST MP 05-08-1630 Yes


LT3088 Package Drawing
LT3088 Package Drawing
LT3088 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
(1-99)
Price
(1k)*
RoHS
LT3088EDD#PBF 3x3 DFN-8 E $2.86 $2.00 Yes
LT3088EDD#TRPBF 3x3 DFN-8 E $2.06 Yes
LT3088EM#PBF DDPAK-3 E $3.14 $2.20 Yes
LT3088EM#TRPBF DDPAK-3 E $2.26 Yes
LT3088EST#PBF SOT-223 E $2.79 $1.95 Yes
LT3088EST#TRPBF SOT-223 E $2.01 Yes
LT3088HDD#PBF 3x3 DFN-8 H $3.75 $2.63 Yes
LT3088HDD#TRPBF 3x3 DFN-8 H $2.69 Yes
LT3088HM#PBF DDPAK-3 H $4.09 $2.86 Yes
LT3088HM#TRPBF DDPAK-3 H $2.92 Yes
LT3088HST#PBF SOT-223 H $3.66 $2.56 Yes
LT3088HST#TRPBF SOT-223 H $2.62 Yes
LT3088IDD#PBF 3x3 DFN-8 I $3.29 $2.30 Yes
LT3088IDD#TRPBF 3x3 DFN-8 I $2.36 Yes
LT3088IM#PBF DDPAK-3 I $3.62 $2.53 Yes
LT3088IM#TRPBF DDPAK-3 I $2.59 Yes
LT3088IST#PBF SOT-223 I $3.17 $2.22 Yes
LT3088IST#TRPBF SOT-223 I $2.28 Yes
LT3088MPM DDPAK-3 MP $8.49 $5.94 No
LT3088MPM#PBF DDPAK-3 MP $8.49 $5.94 Yes
LT3088MPM#TRPBF DDPAK-3 MP $6.00 Yes
LT3088MPST#PBF SOT-223 MP $7.53 $5.27 Yes
LT3088MPST#TRPBF SOT-223 MP $5.33 Yes
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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
DC2279A LT3088EDD Demo Board | 800mA Wide SOA Linear Regulator, 1.6V ≤ VIN ≤ 36V, Vout = 1.2V/1.5V/1.8V/2.5V/3.3V/5V @ 800mA $100.00
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Click here to view our complete list of demo boards

Applications

  • All Surface Mount Power Supply
  • Rugged Industrial Power Supply
  • Post Regulator for Switching Supplies
  • Low Output Voltage Supply
  • Intrinsic Safety Applications

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Design Tools

LTspice

LTspice® software is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice

To launch a ready to run LTspice demonstration circuit for this part:

  • Step 1: If you have not installed LTspice on this computer, download and install LTspice
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Models for the following parts are available in LTspice:
LT3088

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