Tool/software:
Hi,
I am using the TPS2553DRV as a current limiter being driven from a 5V/3A DC/DC converter in one of my designs. The ILIM resistor is set to 23.7k, which puts the limiting current at approximately 1.1A. When I pull enough current through the device to trigger current limiting, the output voltage of the TPS2553 drops to ~0V (which is as expected), but the output current drops to ~500mA to ~700mA instead of the current-limiting value set by ILIM. Additionally, the output current is not stable, and jumps around within the 500mA to 700mA range.
Do you know what might be causing this behavior, and why the TPS2553 is not limiting at the expected 1.1A value?
Thanks,
Adam