Again, care must be taken not to unnecessarily add cost to the power converter subsystem. For applications where low noise is critical, the addition of output filtering components may be more economical than specifying an ultra-low noise converter. It is often desirable to adjust a converter output to fit the requirements of a specific application.
Many converters provide an output trim feature that adjusts the converter feedback loop .
Long PCB runs or leads can pick up excessive noise, which is then fed into the converter feedback network. The capacitance value should be very small so as to avoid potential turn-on overshoot or converter stability problem. The vendor should always be contacted to insure that a particular connection will not degrade performance or cause failure. Connection Converter outputs are connected in series to change the voltage level. Figure 12 shows a typical connection.