Define which converters are to be enabled or disabled by connecting the correct jumpers accordingly (enable to V3V, disable to GND for all cases).
Apply a DC voltage to jumper J3. Polarity is clearly marked on the silk-screen.
Verify that the relevant converters are powered up by the output voltages. The whole start-up process will take around 100 ms. PGOOD will be asserted after 1 s.
Apply loads to the output connectors.
For low power and SYNC operation remove the jumpers and connect control supplies as indicated in the bench test setup section.