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Make sure the low ESR capacitor on the power supply output (usually a tantalum one) is
rated at least 10V.
For Car applications a spike protection diode should be inserted close to the power input, in
order to clean the supply from spikes.
A protection diode should be inserted close to the power input, in order to save the UE910
from power polarity inversion. This can be the same diode as for spike protection.
An example of switching regulator with 12V input is in the below schematic:
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