How to connect 2 3v3 lines in parallel from different dc/dc converters?
If your application can tolerate a small resistance in the power circuit then Voltage Regulators with same output voltage can be paralleled easily.

Consider the circuit below where V1 and V2 are nominally 1V but in reality may be a little different. Then with zero load (I1=0): \$I_{R1}-I_{R2}=2(V_1-V_2)/(R_1+R_2)\$ so you can get reasonable matching of currents for resistors in the m\$\Omega\$ range. So if your max voltage difference was likely to be 10mV (say) then 10m\$\Omega\$ resistors would give you a matching of 1A.

Also, the current matching due to mismatched interconnect resistance at load is \$I_{R1}/I_{R2}=R_2/R_1\$ so adding 10m\$\Omega\$ to the interconnect in this way should drown out the influence of standard interconnect resistance.







simulate this circuit &ndash; Schematic created using CircuitLab