There is a problem when I use ADP7142. When I apply a negetive voltage below -0.5V, the LDO will not work. Once the voltage over than -0.5V, the output go back to normal as the curve I captured(the yellow one is a negetive voltage from a signal source in series with a 1k resistor).
Besides, I test the ADP7118 with the same condition, it prove to be the same. But when I test ADP123, it work normal.