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TPS65910A3 power up without push button???

Sandeep N S
Intellectual 280 points
Other Parts Discussed in Thread: TPS65910

Hi,

For power up the TPS65910A3 for AM335X without using power button, I pulled up PWRHLD to VBAT(5V) with a 10K resistor and left PWRON as no connect as per the link 

http://e2e.ti.com/support/arm/sitara_arm/f/791/p/278204/1197964#1197964

http://e2e.ti.com/support/power_management/pmu/f/43/t/191121 

1,So before the PMIC turns on, voltage/signal(VBAT-5V) appears at the PWRHLD  pin.  Will it cause any issue???? Is it affect the life of PMIC???

2, As per the TPS65910 datasheet and Checklist, a power low transition should be in the PWRON pin to start up the PMIC. But when we left no connect PWRON (Internally pulled up), How the PMIC come into ON state??