My customer had found some failure of TPS2511 in MP status.
During tests, we find that CS/ pin of the defective TPS2511 can’t be pulled low even the output current is more than half of the current setting by Ilim_set resistor, and the output voltage will be unstable. if manually pulling low CS/ PIN, output can change from unstable to stable. What is possible reason of CS/ pin impacting output stability in defective TPS2511?
The sink current of CS pin with defective TPS2511 is pulse shape, but for good TPS2511, the sink current can be continuous. which one of CS pin sink current mode is right? the detail test waveforms are attached.TPS2511-OUTPUT ERROR-30-sep.pdf