Push Button Controller Issue with LTC2950-1

Hi,

I'm working on a new application using nPM1100 PMIC for power management and LTC2950-1 as a push-button controller to try to implement device ON-OFF and SOS functionality using single Tactile/Push Button Switch.

However, the push-button circuit is not working as expected. The board gets hot, and the VSYS voltage drops to around 1V when connected to a 5V USB supply. When I removed the push-button circuit block, everything works fine.

I'm sharing the implemented circuit and the reference schematics I followed. Could anyone help debug the issue?

Thanks in advance.

For more details, kindly check the post link below:

https://www.eevblog.com/forum/projects/push-button-controller-issue-with-ltc2950-1-need-debugging-help/new/#new

Implemented:

Reference Circuit: