LT3050 - 100mA, Linear Regulator with Precision Current Limit and Diagnostic Outputs

Features

  • Output Current Monitor: 1/100th of IOUT
  • Fault Indicator: Current Limit, Minimum IOUT or Thermal Limit
  • Output Current: 100mA
  • Dropout Voltage: 340mV
  • Input Voltage Range: 1.6V to 45V
  • Programmable Precision Current Limit: ±5%
  • Programmable Minimum IOUT Monitor
  • Low Noise: 30μVRMS (10Hz to 100kHz)
  • Adjustable Output (VREF = VOUT(MIN) = 0.6V)
  • Fixed Output Voltages: 3.3V, 5V
  • Output Tolerance: ±2% Over Line, Load and Temperature
  • Stable with Low ESR, Ceramic Output Capacitors (2.2μF minimum)
  • Shutdown Current: <1μA
  • Reverse-Battery, Reverse-Output and Reverse-Current Protection
  • Thermal Limit Protection
  • 12-Lead 3mm × 2mm DFN and MSOP Packages
Designed for Automotive and Transportation Applications
AEC-Q100 generic family data available for specific packages


Typical Application

LT3050 Typical Application
LT3050 Typical Application

Description

The LT3050 series are micro-power, low noise, low dropout voltage (LDO) linear regulators. The devices supply 100mA of output current with a dropout voltage of 340mV. A 10nF bypass capacitor reduces output noise to 30μVRMS in a 10Hz to 100kHz bandwidth and soft-starts the reference. The LT3050’s ±45V input voltage rating combined with its precision current limit and diagnostic functions make the IC an ideal choice for robust, high reliability applications.

A single resistor programs the LT3050’s current limit, accurate to ±5% over a wide input voltage and temperature range. A single resistor programs the LT3050’s minimum output current monitor, useful for detecting open-circuit conditions. The current monitor function sources a current equal to 1/100th of output current. A logic FAULT pin asserts low if the LT3050 is in current limit, operating below its minimum output current (open-circuit) or is in thermal shutdown.

The LT3050 optimizes stability and transient response with low ESR ceramic capacitors, requiring a minimum of 2.2μF. The LT3050 is available in fixed output voltages of 3.3V and 5V, and as an adjustable version with an output voltage range down to the 0.6V reference.The LT3050 is available in the thermally-enhanced 12-Lead 3mm × 2mm DFN and MSOP packages.

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
LT3050EDDB-3.3#PBF 3x2 DFN-12 DDB E 05-08-1723 Yes
LT3050EDDB-3.3#TRMPBF 3x2 DFN-12 DDB E 05-08-1723 Yes
LT3050EDDB-3.3#TRPBF 3x2 DFN-12 DDB E 05-08-1723 Yes
LT3050EDDB-5#PBF 3x2 DFN-12 DDB E 05-08-1723 Yes
LT3050EDDB-5#TRMPBF 3x2 DFN-12 DDB E 05-08-1723 Yes
LT3050EDDB-5#TRPBF 3x2 DFN-12 DDB E 05-08-1723 Yes
LT3050EDDB#PBF 3x2 DFN-12 DDB E 05-08-1723 Yes
LT3050EDDB#TRMPBF 3x2 DFN-12 DDB E 05-08-1723 Yes
LT3050EDDB#TRPBF 3x2 DFN-12 DDB E 05-08-1723 Yes
LT3050EMSE-3.3#PBF MS-12E MSE E 05-08-1666 Yes
LT3050EMSE-3.3#TRPBF MS-12E MSE E 05-08-1666 Yes
LT3050EMSE-5#PBF MS-12E MSE E 05-08-1666 Yes
LT3050EMSE-5#TRPBF MS-12E MSE E 05-08-1666 Yes
LT3050EMSE#PBF MS-12E MSE E 05-08-1666 Yes
LT3050EMSE#TRPBF MS-12E MSE E 05-08-1666 Yes
LT3050IDDB-3.3#PBF 3x2 DFN-12 DDB I 05-08-1723 Yes
LT3050IDDB-3.3#TRMPBF 3x2 DFN-12 DDB I 05-08-1723 Yes
LT3050IDDB-3.3#TRPBF 3x2 DFN-12 DDB I 05-08-1723 Yes
LT3050IDDB-5#PBF 3x2 DFN-12 DDB I 05-08-1723 Yes
LT3050IDDB-5#TRMPBF 3x2 DFN-12 DDB I 05-08-1723 Yes
LT3050IDDB-5#TRPBF 3x2 DFN-12 DDB I 05-08-1723 Yes
LT3050IDDB#PBF 3x2 DFN-12 DDB I 05-08-1723 Yes
LT3050IDDB#TRMPBF 3x2 DFN-12 DDB I 05-08-1723 Yes
LT3050IDDB#TRPBF 3x2 DFN-12 DDB I 05-08-1723 Yes
LT3050IMSE-3.3#PBF MS-12E MSE I 05-08-1666 Yes
LT3050IMSE-3.3#TRPBF MS-12E MSE I 05-08-1666 Yes
LT3050IMSE-5#PBF MS-12E MSE I 05-08-1666 Yes
LT3050IMSE-5#TRPBF MS-12E MSE I 05-08-1666 Yes
LT3050IMSE#PBF MS-12E MSE I 05-08-1666 Yes
LT3050IMSE#TRPBF MS-12E MSE I 05-08-1666 Yes
LT3050MPMSE MS-12E MSE MP 05-08-1666 No
LT3050MPMSE-3.3#PBF MS-12E MSE MP 05-08-1666 Yes
LT3050MPMSE-3.3#TRPBF MS-12E MSE MP 05-08-1666 Yes
LT3050MPMSE-5#PBF MS-12E MSE MP 05-08-1666 Yes
LT3050MPMSE-5#TRPBF MS-12E MSE MP 05-08-1666 Yes
LT3050MPMSE#PBF MS-12E MSE MP 05-08-1666 Yes
LT3050MPMSE#TRPBF MS-12E MSE MP 05-08-1666 Yes


LT3050 Package Drawing
LT3050 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
LT3050EDDB-3.3#PBF 3x2 DFN-12 E $2.22 Yes
LT3050EDDB-3.3#TRMPBF 3x2 DFN-12 E $2.22 $1.60 Yes
LT3050EDDB-3.3#TRPBF 3x2 DFN-12 E $2.22 $1.55 Yes
LT3050EDDB-5#PBF 3x2 DFN-12 E $2.22 Yes
LT3050EDDB-5#TRMPBF 3x2 DFN-12 E $2.22 $1.60 Yes
LT3050EDDB-5#TRPBF 3x2 DFN-12 E $2.22 $1.55 Yes
LT3050EDDB#PBF 3x2 DFN-12 E $2.22 Yes
LT3050EDDB#TRMPBF 3x2 DFN-12 E $2.22 $1.60 Yes
LT3050EDDB#TRPBF 3x2 DFN-12 E $2.22 $1.55 Yes
LT3050EMSE-3.3#PBF MS-12E E $2.22 $1.55 Yes
LT3050EMSE-3.3#TRPBF MS-12E E $1.61 Yes
LT3050EMSE-5#PBF MS-12E E $2.22 $1.55 Yes
LT3050EMSE-5#TRPBF MS-12E E $1.61 Yes
LT3050EMSE#PBF MS-12E E $2.22 $1.55 Yes
LT3050EMSE#TRPBF MS-12E E $1.61 Yes
LT3050IDDB-3.3#PBF 3x2 DFN-12 I $2.50 Yes
LT3050IDDB-3.3#TRMPBF 3x2 DFN-12 I $2.50 $1.80 Yes
LT3050IDDB-3.3#TRPBF 3x2 DFN-12 I $2.50 $1.75 Yes
LT3050IDDB-5#PBF 3x2 DFN-12 I $2.50 Yes
LT3050IDDB-5#TRMPBF 3x2 DFN-12 I $2.50 $1.80 Yes
LT3050IDDB-5#TRPBF 3x2 DFN-12 I $2.50 $1.75 Yes
LT3050IDDB#PBF 3x2 DFN-12 I $2.50 Yes
LT3050IDDB#TRMPBF 3x2 DFN-12 I $2.50 $1.80 Yes
LT3050IDDB#TRPBF 3x2 DFN-12 I $2.50 $1.75 Yes
LT3050IMSE-3.3#PBF MS-12E I $2.50 $1.75 Yes
LT3050IMSE-3.3#TRPBF MS-12E I $1.81 Yes
LT3050IMSE-5#PBF MS-12E I $2.50 $1.75 Yes
LT3050IMSE-5#TRPBF MS-12E I $1.81 Yes
LT3050IMSE#PBF MS-12E I $2.50 $1.75 Yes
LT3050IMSE#TRPBF MS-12E I $1.81 Yes
LT3050MPMSE MS-12E MP $5.99 $4.19 No
LT3050MPMSE-3.3#PBF MS-12E MP $5.99 $4.19 Yes
LT3050MPMSE-3.3#TRPBF MS-12E MP $4.25 Yes
LT3050MPMSE-5#PBF MS-12E MP $5.99 $4.19 Yes
LT3050MPMSE-5#TRPBF MS-12E MP $4.25 Yes
LT3050MPMSE#PBF MS-12E MP $5.99 $4.19 Yes
LT3050MPMSE#TRPBF MS-12E MP $4.25 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
DC1515A LT3050EDDB Demo Board | Micropower Low Noise, Low Dropout Linear Regulator, Current Limit, Diagnostics, 2V ≤ VIN ≤ 45V, Vout = 1.2V/1.5V/1.8V/2.5V/3.3V/5V/Adj @ 100mA $100.00
Buy Now
Click here to view our complete list of demo boards

Designed for Automotive and Transportation Applications

Please contact your local sales representative for more information regarding reliability reports and AEC-Q100 data 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
LT3050IDDB-3.3#PBF 3x2 DFN-12 I $2.50 Yes
LT3050IDDB-3.3#TRMPBF 3x2 DFN-12 I $2.50 $1.80 Yes
LT3050IDDB-3.3#TRPBF 3x2 DFN-12 I $2.50 $1.75 Yes
LT3050IDDB-5#PBF 3x2 DFN-12 I $2.50 Yes
LT3050IDDB-5#TRMPBF 3x2 DFN-12 I $2.50 $1.80 Yes
LT3050IDDB-5#TRPBF 3x2 DFN-12 I $2.50 $1.75 Yes
LT3050IDDB#PBF 3x2 DFN-12 I $2.50 Yes
LT3050IDDB#TRMPBF 3x2 DFN-12 I $2.50 $1.80 Yes
LT3050IDDB#TRPBF 3x2 DFN-12 I $2.50 $1.75 Yes
LT3050IMSE-3.3#PBF MS-12E I $2.50 $1.75 Yes
LT3050IMSE-3.3#TRPBF MS-12E I $1.81 Yes
LT3050IMSE-5#PBF MS-12E I $2.50 $1.75 Yes
LT3050IMSE-5#TRPBF MS-12E I $1.81 Yes
LT3050IMSE#PBF MS-12E I $2.50 $1.75 Yes
LT3050IMSE#TRPBF MS-12E I $1.81 Yes
LT3050MPMSE-3.3#PBF MS-12E MP $5.99 $4.19 Yes
LT3050MPMSE-3.3#TRPBF MS-12E MP $4.25 Yes
LT3050MPMSE-5#PBF MS-12E MP $5.99 $4.19 Yes
LT3050MPMSE-5#TRPBF MS-12E MP $4.25 Yes
LT3050MPMSE#PBF MS-12E MP $5.99 $4.19 Yes
LT3050MPMSE#TRPBF MS-12E MP $4.25 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

  • Protected Antenna Supplies
  • Automotive Telematics
  • Industrial Applications (Trucks, Forklifts, etc.)
  • High Reliability Applications

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Design Tools

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LT3050
LT3050-3.3
LT3050-5

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