L4979D Datasheet PDF - ST Microelectronics

●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.

●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 (Tj = -40 °C to 150 °C)

●■ Enable input for enabling/disabling the voltage regulator output