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The L4940 series of three-terminal positive regulators is available in TO-220 and D²PAK packages and with several fixed output voltages, making it useful in a wide range of industrial and consumer applications. Thanks to their very low input/output voltage drop, these devices are particularly suitable for battery-powered equipment, reducing consumption and prolonging battery-life. Each type employs internal current limiting, anti-saturation circuit, thermal shutdown and safe area protection.
Key Features
- Precise 5, 8.5, 12 V outputs
- Low dropout voltage (450 mV typ. at 1 A)
- Very low quiescent current
- Thermal shutdown
- Short-circuit protection
- Reverse polarity protection
Sample & Buy
| Part Number | Package | Packing Type | Output Voltage (V) (nom) | Output Tolerance (typ) | Output Current (A) (nom) | Marketing Status | Budgetary Price (US$)* | Quantity | ECCN (US) | Country of Origin | More info | Order from Distributors | Order from ST |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| L4940V5 | TO-220 | Tube | 5 | 2 | 1.5 |
Active
|
0.578 | 1000 | EAR99 | CHINA | Check Availability | Buy now | |
| L4940D2T12-TR | D2PAK | Tape And Reel | 12 | 2 | 1.5 |
Active
|
0.497 | 1000 | EAR99 | CHINA | Check Availability | Buy now | |
| L4940D2T5-TR | D2PAK | Tape And Reel | 5 | 2 | 1.5 |
Active
|
0.497 | 1000 | EAR99 | CHINA | Check Availability | Buy now | |
| L4940V85 | TO-220 | Tube | 8.5 | 2 | 1.5 |
Active
|
0.578 | 1000 | EAR99 | CHINA | Check Availability | Buy now |
(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors
Featured Videos
| Part Number | Marketing Status | Package | Grade | RoHS Compliance Grade | Material Declaration** |
|---|---|---|---|---|---|
| L4940D2T12-TR |
Active
|
D2PAK | Industrial | Ecopack2 |
|
| L4940D2T5-TR |
Active
|
D2PAK | Industrial | Ecopack2 |
|
| L4940V5 |
Active
|
TO-220 | Industrial | Ecopack1 | |
| L4940V85 |
Active
|
TO-220 | Industrial | Ecopack1 |
|
(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.
