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Part Number: TPS720
I have the following 1.8V power supply using the TPS720 (see schematics below):
I am observing the following behaviour:
What is wrong with the way we are using the TPS720 such that it is not working as described in the datasheet under NO-LOAD condition?
From a schematic point of view your application is fine. Generally when the output of a linear regulator is higher than the set voltage, it is due to an unintentional leakage path. Your description of a slow increase on the output supports the possibility of an unintentional leakage path. When you add a load you are able to defeat this leakage path. These paths can be from a variety of locations including residual flux that was not properly cleaned after assembling the PCB.
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In reply to Ryan Eslinger:
Your input was very helpful. The unintentional leakage path was through the diode, which we placed for additional safety for the power-off sequencing.Removing the diode solved the issue.
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