What are the Power Supply sequencing requirements for ADG452?
You should not power up VL before VDD or you will be exceeding the
absolute max ratings for the part (VL to GND = −0.3 V to VDD + 0.3 V) and will
result in part failure, if this occurs often it will lead to part failure,
using external shottky diodes and a series limiting resistor will protect the
part from latch up should this occur.