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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
Featured Videos
All resources
Product Specifications (1)
| Resource title | Latest update | |||
|---|---|---|---|---|
| 08 Apr 2015 |
08 Apr 2015
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Application Notes (1)
| Resource title | Latest update | |||
|---|---|---|---|---|
| 18 Oct 2019 |
18 Oct 2019
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Selection Guides (1)
| Resource title | Latest update | |||
|---|---|---|---|---|
| 04 Jan 2021 |
04 Jan 2021
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Brochures (2)
| Resource title | Latest update | |||
|---|---|---|---|---|
| 15 Feb 2019 |
15 Feb 2019
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| 26 Feb 2020 |
26 Feb 2020
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EDA Symbols, Footprints and 3D Models
STMicroelectronics - L4940
Speed up your design by downloading all the EDA symbols, footprints and 3D models for your application. You have access to a large number of CAD formats to fit with your design toolchain.
Symbols
Footprints
3D models
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 | Ecopack2 | |
| L4940V85 |
Active
|
TO-220 | Industrial | Ecopack2 |
|
(**) 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 | Marketing Status | ECCN (US) | ECCN (EU) | Packing Type | Package | Temperature (°C) | Output Voltage (V) (nom) | Output Tolerance (typ) | Output Current (A) (nom) | Country of Origin | Budgetary Price (US$)*/Qty | More info | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| min | max | |||||||||||||||
| L4940V5 | 7 distributors | Buy Direct |
Active
|
EAR99 | NEC | Tube | TO-220 | -40 | 150 | 5 | 2 | 1.5 | CHINA | 0.578 / 1k | ||
| L4940D2T12-TR | 6 distributors | Buy Direct |
Active
|
EAR99 | NEC | Tape And Reel | D2PAK | -40 | 150 | 12 | 2 | 1.5 | CHINA | 0.497 / 1k | ||
| L4940D2T5-TR | 5 distributors | Buy Direct |
Active
|
EAR99 | NEC | Tape And Reel | D2PAK | -40 | 150 | 5 | 2 | 1.5 | CHINA | 0.497 / 1k | ||
| L4940V85 | 4 distributors | Buy Direct |
Active
|
EAR99 | NEC | Tube | TO-220 | -40 | 150 | 8.5 | 2 | 1.5 | 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
