For our application, we require the output from battery to power a PMIC which takes input from 3.3V to 5V. Battery voltage is 3.7V, which will drop overtime.
So we are looking for a battery charger IC with constant output voltage in battery only mode.
I was looking at BQ25620, but it seems that the output voltage at SYS pin is only adjustable in VBUS mode. Is this understanding correct?
Or can we make some register settings to provide constant output voltage in battery only mode?
Does TI have any IC with Battery charger + Buck-Boost converter integrated? The alternative solution we have to go with is Charger + Boost converter -> 2 separate IC's, but we prefer an integrated solution if available.
Thanks & Regards,