Product overview
Description
L4979D and L4979MD are low dropout linear regulators with microprocessor control functions such as low voltage reset, watchdog, on/off control. Typical quiescent current is 100 μA in very low output current mode and enabled regulator. The devices drop to 6 μA with not enabled regulators. On chip trimming results in high output voltage accuracy (+/-2%). Accuracy is kept over wide temperature range, line and load variation.The maximum input voltage is 40 V. The max output current is internally limited. Internal temperature protection disables the voltage regulator output.
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All features
- AEC-Q100 qualified
- Operating DC supply voltage range 5.6 V to 31 V
- Low quiescent current (6 μA typ. @ 25 °C with enable low)
- High precision output voltage (+/-2%)
- Low dropout voltage less than 0.5 V
- Reset circuit sensing the output voltage down to 1 V
- Programmable reset pulse delay with external capacitor
- Watchdog
- Programmable watchdog timer with external capacitor
- Thermal shutdown and short circuit protection
- Automotive temperature range (Tj = -40 °C to 150 °C)
- Enable input for enabling/disabling the voltage regulator output
Circuit Diagram
All resources
| Resource title | Latest update |
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Product Specifications (1)
| Resource title | Latest update | |||
|---|---|---|---|---|
| 24 Sep 2018 | 24 Sep 2018 |
Selection Guides (1)
| Resource title | Latest update | |||
|---|---|---|---|---|
| 02 Mar 2021 | 02 Mar 2021 |
EDA Symbols, Footprints and 3D Models
STMicroelectronics - L4979MD
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Symbols
Footprints
3D models
Quality and Reliability
| Part Number | Marketing Status | Package | Grade | RoHS Compliance Grade | Material Declaration** |
|---|---|---|---|---|---|
| L4979MD | Active | SO-20 | Automotive | Ecopack2 (**) | |
| L4979MD013TR | Active | SO-20 | Automotive | 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) | Country of Origin | Budgetary Price (US$)*/Qty | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| min | max | |||||||||||
| L4979MD013TR | 1 distributors | Buy Direct | Active | EAR99 | NEC | Tape And Reel | SO-20 | - | - | MALAYSIA | 0.5962 / 1k | |
| L4979MD | No availability of distributors reported, please contact our sales office | Active | EAR99 | NEC | Tube | SO-20 | - | - | MALAYSIA | 0.5962 / 1k | ||
Marketing Status
ActiveECCN (US)
EAR99Budgetary Price (US$)*/Qty
0.5962 / 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
