bq78PL116 sequence

Hi Folks,

For bq78PL116 am I right to say that:

(1)    Inputs to LDO1 and LDO2 are (V2-Vss) and (V4-V2) respectively? Because of that V2 got to “on” first (to activate LDO1) before V1 then follow by V4 (to activate LDO2) then V3.    

(2)    LDO1 (which supplying the Vcc for the lower side portion) has to be up first prior to application of input voltages next follow by LDO2.   

From internal circuitry point of view why BATT+ has to be the final one that kick in? Let say if it was being applied such that –Vss, BATT-, BATT+, V2, V1……… why would that cause problem?     

Thanks.

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