Other Parts Discussed in Thread: TPS53632,
This design has the output voltage max at 1.2V, do you have any designs that go from 48V to 1.8V?
It looks like the TPS53632 limits the voltage to 1.2V
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at "standard" controllers min Vin is limited to Vref due to virtual short circuit at OpAmp input;
this device got some more IP in it. Despite Vref 1.7V the 6-bit VID i/f allows Vout 500mV to 1.52V
by resolution in 64 steps.
BUT: another limitation needs to be considered by input voltage, switching frequency and number
of phases - i.e. at Fsw 1MHz max. output voltage is 1.28V !
The spreadsheet helps to figure out the suited Fsw according to needed Vout.
Best regards, Bernd