L4979D

NRND
Design Win

Automotive Low Drop Voltage Regulator

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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.

  • 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 (**)

L4979D013TR

Package:

SO-8

Material Declaration**:

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Marketing Status

NRND

Package

SO-8

Grade

Automotive

RoHS Compliance Grade

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.

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