In this case, DC DC switching regulator has 2 outputs configured to it. DC DC switching regulators like this one generate Fixed outputs on their output pins to handle the power management. It has a 5-pin voltage regulator dc to dc.
RKZ-053.3D Features
2 outputs
RKZ-053.3D Applications
There are a lot of RECOM Power RKZ-053.3D Voltage Regulators applications.