The 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 100µA in very low output current mode and enabled regulator. The devices drop to 6µA 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.
This document is a production data datasheet for the L4979D and L4979MD, which are low dropout (LDO) linear regulators designed with integrated microprocessor control functions. Key features include low voltage reset, a programmable watchdog timer, on/off enable control, and thermal shutdown protection. The devices operate over an automotive temperature range of -40 °C to 150 °C.
| Operating DC supply voltage range | 5.6 V to 31V |
|---|---|
| Output voltage accuracy | 2% |
| Maximum input voltage | 40 V |
| Quiescent current (enabled) | 100 µA typ. |
| Quiescent current (disabled) | 6 µA |
| Junction temperature range | -40 °C to 150 °C |
The maximum input voltage is 40 V.
The device operates with a DC supply voltage ranging from 5.6 V to 31V.
The automotive temperature range allows a junction temperature up to 150 °C.
The reset circuit senses the output voltage down to 1V.