Is it possible to have one TPS5430 configuration that could be set via the Vsense resistors to either 5V or 18V output, assuming a 24V input? When I run Webench the designs are different, mainly requiring larger Cin and L for the higher output voltage, and larger Cout for the lower voltage.
Would it be feasible to use the larger values (e.g., Cin and L calculated for 18 Vout, Cout calculated for 5 Vout)? Absolute efficiency isn't critical for my application, though low ripple output is important. And BOM cost isn't really an issue, either. Is a compromise like this feasible, or should i just run two separate BOMs?
Also, another question -- I can't find in the datasheet either a maximum Vout, or a dropout voltage (e.g., how much does Vin have to exceed Vout)? Do those specs exist? From playing with the designer it looks like at least at the higher Vout, about 4 volts of headroom is required.
Thanks!
John