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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
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Quality and Reliability
| 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.
Sample & Buy
| Part Number | Order from Distributors | Order from ST | Package | Packing Type | Output Voltage (V) (nom) | Output Tolerance (typ) | Output Current (A) (nom) | Marketing Status | ECCN (US) | Country of Origin | Budgetary Price (US$)*/Qty | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| L4940V5 | 10 distributors | Buy now | TO-220 | Tube | 5 | 2 | 1.5 | Active | EAR99 | CHINA | 0.578 / 1k | |
| L4940D2T12-TR | 8 distributors | Buy now | D2PAK | Tape And Reel | 12 | 2 | 1.5 | Active | EAR99 | CHINA | 0.497 / 1k | |
| L4940D2T5-TR | 7 distributors | Buy now | D2PAK | Tape And Reel | 5 | 2 | 1.5 | Active | EAR99 | CHINA | 0.497 / 1k | |
| L4940V85 | 5 distributors | Buy now | TO-220 | Tube | 8.5 | 2 | 1.5 | Active | EAR99 | CHINA | 0.578 / 1k |
(*) 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
