LT3090 - –36V, 600mA Negative Linear Regulator with Programmable Current Limit

Features

  • Output Current: 600mA
  • Single Resistor Sets Output Voltage
  • 50μA SET Pin Current: ±1% Initial Accuracy
  • Programmable Current Limit
  • Positive or Negative Output Current Monitor
  • Parallelable for Higher Current and Heat Spreading
  • Low Dropout Voltage: 300mV
  • Low Output Noise: 18μVRMS (10Hz to 100kHz)
  • Configurable as 3-Terminal Floating Regulator
  • Wide Input Voltage Range: –1.5V to –36V
  • Rail-to-Rail Output Voltage Range: 0V to –32V
  • Positive/Negative Shutdown Logic or UVLO
  • Programmable Cable Drop Compensation
  • Load Regulation: 1.2mV (1mA to 600mA)
  • Stable with 4.7μF Minimum Output Capacitor
  • Stable with Ceramic or Tantalum Capacitors
  • Thermally Enhanced 12-Lead MSOP and 10-Lead 0.75mm × 3mm × 3mm DFN Packages
Designed for Automotive and Transportation Applications
AEC-Q100 data available for specific packages


Typical Application

LT3090 Typical Application
LT3090 Typical Application

Description

The LT®3090 is a 600mA, low dropout negative linear regulator that is easily parallelable to increase output current or spread heat on surface mounted boards. Designed with a precision current reference followed by a high performance rail-to-rail voltage buffer, this regulator finds use in applications requiring precision output, high current with no heat sink, output adjustability to zero and low dropout voltage. The device can also be configured as a 3-terminal floating regulator.

The LT3090 features fast transient response, high PSRR and output noise as low as 18μVRMS. The LT3090 generates a wide output voltage range (0V to –32V) while maintaining unity gain operation. This yields virtually constant bandwidth, load regulation, PSRR and noise, regardless of the programmed output voltage.

The LT3090 supplies 600mA at a typical dropout voltage of 300mV. Operating quiescent current is nominally 1mA and drops to << 1μA in shutdown. A single resistor adjusts the LT3090’s precision programmable current limit. The LT3090’s positive or negative current monitor either sources a current (0.5mA/A) or sinks a current (1mA/A) proportional to output current. Built-in protection includes reverse output protection, internal current limit with foldback and thermal shutdown with hysteresis.

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
LT3090EDD#PBF 3x3 DFN-10 DD E 05-08-1699 Yes
LT3090EDD#TRPBF 3x3 DFN-10 DD E 05-08-1699 Yes
LT3090EMSE#PBF MS-12E MSE E 05-08-1666 Yes
LT3090EMSE#TRPBF MS-12E MSE E 05-08-1666 Yes
LT3090HDD#PBF 3x3 DFN-10 DD H 05-08-1699 Yes
LT3090HDD#TRPBF 3x3 DFN-10 DD H 05-08-1699 Yes
LT3090HMSE#PBF MS-12E MSE H 05-08-1666 Yes
LT3090HMSE#TRPBF MS-12E MSE H 05-08-1666 Yes
LT3090IDD#PBF 3x3 DFN-10 DD I 05-08-1699 Yes
LT3090IDD#TRPBF 3x3 DFN-10 DD I 05-08-1699 Yes
LT3090IMSE#PBF MS-12E MSE I 05-08-1666 Yes
LT3090IMSE#TRPBF MS-12E MSE I 05-08-1666 Yes
LT3090MPDD#PBF 3x3 DFN-10 DD MP 05-08-1699 Yes
LT3090MPDD#TRPBF 3x3 DFN-10 DD MP 05-08-1699 Yes
LT3090MPMSE MS-12E MSE MP 05-08-1666 No
LT3090MPMSE#PBF MS-12E MSE MP 05-08-1666 Yes
LT3090MPMSE#TRPBF MS-12E MSE MP 05-08-1666 Yes


LT3090 Package Drawing
LT3090 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
LT3090EDD#PBF 3x3 DFN-10 E $3.07 $2.15 Yes
LT3090EDD#TRPBF 3x3 DFN-10 E $2.21 Yes
LT3090EMSE#PBF MS-12E E $3.07 $2.15 Yes
LT3090EMSE#TRPBF MS-12E E $2.21 Yes
LT3090HDD#PBF 3x3 DFN-10 H $4.14 $2.90 Yes
LT3090HDD#TRPBF 3x3 DFN-10 H $2.96 Yes
LT3090HMSE#PBF MS-12E H $4.14 $2.90 Yes
LT3090HMSE#TRPBF MS-12E H $2.96 Yes
LT3090IDD#PBF 3x3 DFN-10 I $3.57 $2.50 Yes
LT3090IDD#TRPBF 3x3 DFN-10 I $2.56 Yes
LT3090IMSE#PBF MS-12E I $3.57 $2.50 Yes
LT3090IMSE#TRPBF MS-12E I $2.56 Yes
LT3090MPDD#PBF 3x3 DFN-10 MP $8.29 $5.80 Yes
LT3090MPDD#TRPBF 3x3 DFN-10 MP $5.86 Yes
LT3090MPMSE MS-12E MP $8.29 $5.80 No
LT3090MPMSE#PBF MS-12E MP $8.29 $5.80 Yes
LT3090MPMSE#TRPBF MS-12E MP $8.35 $5.86 Yes
Buy NowRequest Samples
* 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
DC1948A LT3090 Demo Board | Negative Linear Regulator with Prog Current Limit, -1.5V ≤ VIN ≤ -36V, Vout = -1.25V/-2.5V/-5V/-12V/-15V/-18V @ 600mA $100.00
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Click here to view our complete list of demo boards

Designed for Automotive and Transportation Applications

AEC-Q100 data is available for these specific part numbers. Please contact your local sales representative for more information regarding reliability reports or to inquire about parts that are not included. For more information, view our Automotive and Transportation page

Part Number Package Temp Price
(1-99)
Price
(1k)*
RoHS
LT3090HDD#PBF 3x3 DFN-10 H $4.14 $2.90 Yes
LT3090HDD#TRPBF 3x3 DFN-10 H $2.96 Yes
LT3090HMSE#PBF MS-12E H $4.14 $2.90 Yes
LT3090HMSE#TRPBF MS-12E H $2.96 Yes
LT3090IDD#PBF 3x3 DFN-10 I $3.57 $2.50 Yes
LT3090IDD#TRPBF 3x3 DFN-10 I $2.56 Yes
LT3090IMSE#PBF MS-12E I $3.57 $2.50 Yes
LT3090IMSE#TRPBF MS-12E I $2.56 Yes
LT3090MPDD#PBF 3x3 DFN-10 MP $8.29 $5.80 Yes
LT3090MPDD#TRPBF 3x3 DFN-10 MP $5.86 Yes
LT3090MPMSE#PBF MS-12E MP $8.29 $5.80 Yes
LT3090MPMSE#TRPBF MS-12E MP $8.35 $5.86 Yes
Buy NowRequest Samples
* 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.

Applications

  • Post Regulator for Switching Supplies
  • Low Noise Instrumentation and RF Supplies
  • Rugged Industrial Supplies
  • Precision Power Supplies

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Design Tools

LTspice

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LT3090

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