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
AEC-Q100 data available for specific packages
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 |
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
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 | |||
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 | |
|---|---|---|---|---|---|---|
| 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 Now • Request Samples | ||||||
Applications
- Protected Antenna Supplies
- Automotive Telematics
- Industrial Applications (Trucks, Forklifts, etc.)
- High Reliability Applications
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Design Tools
LTspice
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Models for the following parts are available in LTspice:
LT3050
LT3050-3.3
LT3050-5
Technical Support
- For immediate technical assistance, contact your local sales office or distributor or call 1-800-4-LINEAR (US customers only) or 408-432-1900.
- For less urgent requests, please complete our Technical Support Request Form. Please allow 2-3 business days for reply.
