On board etc equipment is using tps70936qdbvrq1 for 5V to 3.6V,；
It is found that one prototypes have abnormal current, and the normal working current is 20~50UA, but the fault prototype reaches 87mA. Finally, it is found that the chip of tps70936qdbvrq1 is abnormal.
Please help to see if there are problems in the schematic diagram and PCB design. Thank you。
Test comparison results of LDO good and bad parts:
Abnormal LDO: PIN3 impedance to ground 70 Ω, The output voltage is high, above 3.8V.
Normal LDO: the measured impedance of PIN3 to ground is about 10m Ω; The output voltage is normal, about 3.6V.