The LM73100 device is internally protected
against transient and steady state negative voltages applied at
the input supply pin. The device blocks the negative voltage
from appearing at the output, thereby protecting the load
circuits. There’s no reverse current flowing from output to the
input in this condition. The maximum negative voltage the device
can handle at the input is limited to -15 V or V
OUT –
21 V, whichever is higher. It’s also recommended that all signal
pins (e.g. EN/UVLO, OVLO, PGTH) which are derived from input
supply should have a sufficiently large pull-up resistor to
limit the current flowing out of these pins during reverse
polarity conditions. Please refer to
Absolute Maximum Ratings table for
more details.