I am palnning to use tps 65090 for an application
where in I require to run the system for 1/2 hour after power off
for this I am planning to use this Ic . I am planning to use a 2s li ion battery (net voltage 7.4 V), which will be getting charged till the main supply is available.
my requirements is to supply with
two 5v 800mA ,
one 5V 1.2 A
one 5v 1A . that is a total of 3.8A
1) In the data sheet I found that there are two supplys required one is VAC and Vsys for each LDO and each DCDC .
because it is written in the description that
The device automatically switches adapter or battery power to the system load. The battery is connected to the
system by default during power up or if the adapter power is not available.
In this above statement what is the word system referred to ?
Does it include DCDC and LDO
DO I have to supply a separate VSYS voltage ?
If no , My supply voltage is going to be I guess 12v source will that be ok .
please help me understand this .