I would like to know if we can use LTC3554 IC without using buck regulators (we want to use the IC only as battery charger with power path feature). I read in another post that if we want to use LTC3554 in this configuration it is suggest to connect FB1, FB2 pins to VOUT and leave unconnected SW1 and SW2. I have some doubts about button interface that can disable the power path control. We need to obtain a low quiescent current when VBUS=0 and VOUT will be connected to battery. If we put _ON=PWR_ON1=PWR_ON2=0 and successively we attach an external power (VBUS=5V) I understand, from a datasheet that in the button interface the machine goes in HR, PUP1 and PON states and from PON states will pass to PDN2 (because we have PWR_ON1=PWR_ON2=0) and POFF etc. and therefore it will never stay in PON state in stable manner. I think that this behaviour do not allow at power path control to attach battery at VOUT. I can put PWR_ON1=PWR_ON2=VOUT to stay in PON state. When the battery will be recharge and we will remove external power (VBUS=0) the PWR_ON1 and PWR_ON2 continue to stay at high level (vout passes fro VBUS to VBATT) and therefore tte button interface will remain in PON but the quiescent current will be 6.5uA and not 3uA, it is correct this assumption?
Many Thanks
Francesco