<p>This paper proposes a newly developed non-isolated multi-input expandable topology with an active–passive inductor cell (APIC) and switched-capacitor (SC) network named a multi-input expandable active–passive inductor cell switched-capacitor (MIEAPICSC) DC-DC step-up converter. The APIC’s operating principle is to charge the inductors in parallel from the input source and discharge them in series into the bootstrap capacitor. The proposed converter’s key features are achieved high gain with respect to input voltages, requiring low components count, less than or equal to output voltage stress on semiconductor devices, low current stress on the switches and diodes, low ripple, continuous input current, common ground, and expansion in APIC network maintain the order of transfer function same. Other merits of the proposed converter are simple structure, modularity, higher efficiency, and multi-input improves the load-sharing capability and ensures the reliability of the power supply even one source fails to supply load power. The state-space analysis and controller design are reported. The detailed analysis of the step-up operational modes and all calculations are discussed and carried out in a steady state. The performance of the proposed step-up topology is validated experimentally using the TMS320F28379D controller.</p>