L4979DTR-E Datasheet, PDF (1/22 Pages) STMicroelectronics – Low drop voltage regulator

L4979D
L4979MD
Low drop voltage regulator
Features
■ 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 (T_j = -40 °C to
150 °C)
■ Enable input for enabling/disabling the voltage
regulator output
Datasheet  production data
'!0'#&4
SO-8
'!0'#&4
SO-20
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.
Table 1. Device summary
Package
Order codes
Tube
Tape and reel
SO-8
L4979D
L4979D013TR
SO-20
L4979MD L4979MD013TR
September 2013
This is information on a product in full production.
Doc ID 10262 Rev 9
1/22
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