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LTM4636 Reseting

Category: Hardware
Product Number: ltm4636

Hi, I am using four LTM4636 devices connected in parallel. The input voltage is 5V and and output voltage is 0.8V. 

The problem I am having is the output never reaches a stable voltage before the devices reset. 

Here are some screen shots:

The Yellow Plot is the 5 volt input to the board. 

The Blue trace is the Power Good Pin. 

The Red Trace is the Voltage output of the regulator.

Any ideas what is happening with the output? 

Thank you very much,

Joe