LM9071

SNVS131D – DECEMBER 1999 – REVISED APRIL 2013

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Reset Operation and Protection Features

Block Diagram

APPLICATION HINTS

The LM9071 voltage regulator has been optimized for use in microprocessor based automotive systems. Several

unique design features have been incorporated to address many FMEA (Failure Mode Effects Analysis) concerns

for fail-safe system performance.

FAULT TOLERANT FEATURES

While not specifically ensured due to production testing limitations, the LM9071 has been tested and shown to

continue to provide a regulated output and, not generate an erroneous system reset signal while subjected to

high levels of RF electric field energy (up to 300 V/m signal strength over a 2 MHz to 400 MHz frequency range).

This is very important in vehicle safety related applications where the system must continue to operate normally.

To maintain this immunity to RFI the output bypass capacitor is important (47

μF is recommended).

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