In a traditional switching-regulator topology, each switching regulator needs a inductor indivisually for each output, which enlarges the size, making them a disadvantage for smaller form factors. Linear regulators are another option since they are fast, compact and low noise but they are lossy. After evaluation for the pros and cons, we use a hybrid of multiple low-dropout regulators (LDOs) with DC-DC converters. As shown in the picture below, in four channels case, Bravotek's power solution employs less inductors than traditional art.
The SIMO architecture provides the best solution for compact devices that require smaller PCB size while maintaining efficiency. By reducing the number of required inductors while still maintaining switching converter efficiencies, a SIMO architecture represents an even better and nearly ideal topology for smaller designs.
There are two conduction modes for SIMO, continuous (CCM) and discontinuous (DCM), and Bravotek's patented architecture is the CCM mode that is much more difficult than the DCM mode. Compared with DCM SIMO in the figure below, Bravotek CCM SIMO needs continuous power; without discharge current to zero for pumping next output. In our art, each output energy can be generated by much lower peak current which benefits with smaller power conduction loss and higher current capability.