I have a customer who is experiencing failures on their input capacitor on circuits using the LP2951-33DR and LP2951-50DR. The failure mode is that it's shorting and staying shorted (so the product is unusable until the cap is removed).
Are these regulators "stable" without an input cap. The datasheet says that if there is too much impedance, they should have an input cap. However, he questions if that language is in there because it makes the transient response of the regulators better or if the regulator would become unstable.
Can you provide feedback if these products would become unstable withoutan input cap? Current output cap is 22uF. Current draw is 50 ma for each regulator, for a total of 100 ma. I can follow-up to provide schematic if necessary. Thanks!
