voltage regulator. L4979MD Datasheet

L4979MD regulator. Datasheet pdf. Equivalent

L4979MD Datasheet
Recommendation L4979MD Datasheet
Part L4979MD
Description Automotive Low drop voltage regulator
Feature L4979MD; L4979D, L4979MD Automotive low dropout voltage regulator *$3*&)7 SO-8 *$3*&)7 SO-20 Fe.
Manufacture STMicroelectronics
Datasheet
Download L4979MD Datasheet




STMicroelectronics L4979MD
L4979D, L4979MD
Automotive low dropout voltage regulator
*$3*&)7
SO-8
*$3*&)7
SO-20
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
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
Datasheet - production data
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.
Table 1. Device summary
Package
Order codes
Tube
Tape and reel
SO-8
SO-20
L4979D
L4979MD
L4979D013TR
L4979MD013TR
September 2018
This is information on a product in full production.
DS3717 Rev 11
1/22
www.st.com



STMicroelectronics L4979MD
Contents
Contents
L4979D, L4979MD
1 Block diagram and pin descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.2 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3 Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.1 Voltage regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
3.2 Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
3.3 Watchdog . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4 Package and PCB thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.1 SO-8 thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.2 SO-20 thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.1 ECOPACK® . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.2 SO-8 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.3 SO-20 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
6 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
2/22 DS3717 Rev 11



STMicroelectronics L4979MD
L4979D, L4979MD
List of tables
List of tables
Table 1.
Table 2.
Table 3.
Table 4.
Table 5.
Table 6.
Table 7.
Table 8.
Table 9.
Table 10.
Table 11.
Table 12.
Table 13.
Table 14.
Table 15.
Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Pin function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Voltage regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Watchdog . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Enable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Reset time diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
SO-8 thermal parameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
SO-20 thermal parameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
SO-8 mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
SO-20 mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
DS3717 Rev 11
3/22
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