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
EDA Symbols, Footprints and 3D Models
STMicroelectronics - L4979D
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Quality and Reliability
| Part Number | Marketing Status | Package | Grade | RoHS Compliance Grade | Material Declaration** |
|---|---|---|---|---|---|
| L4979D013TR | NRND | SO-8 | 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 | Marketing Status | Budgetary Price (US$)*/Qty | Order from ST | Order from distributors | Package | Packing Type | RoHS | Country of Origin | ECCN (US) | ECCN (EU) | Operating Temperature (°C) (min) | Operating Temperature (°C) (max) | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| L4979D013TR | | | distributors No availability of distributors reported, please contact our sales office |
L4979D013TR NRND
(*) Suggested Resale Price (USD) per defined quantity for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors