Hi All,
So I am working on a little project and I am interested in knowing if the regulator I have chosen (or any buck regulator) will work if you end up feeding in less voltage than you have configured the regulator to output.
I have a Buck regulator outputting 24V. (TPS54560DDAR) (
http://www.ti.com/lit/ds/symlink/tps54560.pdf)
That 24V powers a 19V LDO linear and a 3.3V Buck
There could be a case where I would need to power the device with only a 24V power source that could drop down to 21V. ( Normally 36VIN )
The regulator (TPS54560DDAR) states after doing the calculations that the Minimum voltage required at my current would be about 25.3V.
What happens when I go under that... does the device stop working and not output any voltage at all?
Or does it just start outputting whatever voltage is coming in?
What if the VIN goes under the configured VOUT of 24V.
With my 19V LDO I can go down to 22V so if my VIN is 22V will the buck regulator just output that 22V?
Thanks in advance and I hope I have given enough detail
