Publication date: 30 September 2026
Source: Advanced Engineering Forum Vol. 60
Author(s): Minyahil Tanashu, Tassew Tadiwos, Amare Kassaw, Tefera Terefe
Non-isolated DC–DC converters are widely used in photovoltaic (PV), electric-vehicle (EV), microgrid (MG), and portable applications where galvanic isolation is unnecessary. Quadratic topologies, including quadratic Ćuk, SEPIC, Zeta, and hybrid converters, can provide wider conversion-ratio ranges and lower control complexity than cascaded multistage converters. This paper reviews classical Buck, Boost, Buck–Boost, Ćuk, SEPIC, and Zeta converters and their quadratic variants in terms of voltage gain, efficiency, and component stress. Hybrid structures, such as Ćuk/SEPIC, Zeta/Boost, and SEPIC/Buck–Boost converters, are also considered because of their high voltage gain or voltage-inversion capability. The principal challenges include nonlinear voltage gain, high switch-voltage and current stresses, and reduced efficiency, particularly under the wide input-voltage range required for maximum power point tracking (MPPT) in PV systems. Further areas where research is needed are insufficient implementation in real-time, inadequate thermal and electromagnetic interference analysis, and underdeveloped machine-learning based optimization.
[1] Y. Hsieh and J. Chen, "Analysis and implementation of a transformer-less interleaved ZVS highstep- down converter", IEEE Trans. Power Electron., vol. 38, no. 6, p.7124–7135, Jun. 2023.
[2] S. Hasanpour, A. Kargar, and M. R. Zolghadri, "A novel full soft-switching high-gain DC–DC converter based on three-winding coupled inductor", IEEE Trans. Power Electron., vol. 36, no. 10, p.12021–12032, Oct. 2021.
[3] S. Hasanpour and T. Nouri, "High step-up SEPIC-based trans-inverse DC–DC converter with quasi-resonance", IEEE Trans. Ind. Electron., vol. 69, no. 4, p.3527–3539, Apr. 2022.
[4] S. Revathi and M. Prabhakar, "Non-isolated high gain DC–DC converter topologies for PV applications: A comprehensive review", Renew. Sustain. Energy Rev., vol. 66, p.920–933, Dec. 2016.
[5] B. Chandrasekar, V. Raman, and R. Jeyapaul, "Non-isolated high-gain triple-port DC–DC buck–boost converter with positive output voltage for photovoltaic applications", IEEE Access, vol. 8, p.113649–113658, 2020.
[6] S. Hasanpour and T. Nouri, "New structure of single-switch ultra-high-gain DC–DC converter for renewable energy applications", IEEE Trans. Power Electron., vol. 37, no. 3, p.3028–3037, Mar. 2022.
[7] S.-M. Chen, T.-J. Liang, L.-S. Yang, and J.-F. Chen, "A cascaded high step-up DC–DC converter with single switch for micro source applications", IEEE Trans. Power Electron., vol. 26, no. 4, p.1146–1153, Apr. 2011.
[8] H. Tarzamni, A. Rezaei, and M. Abapour, "Operation and design consideration of an ultrahigh step-up DC–DC converter featuring high power density", IEEE J. Emerg. Sel. Top. Power Electron., vol. 10, no. 2, p.1962–1972, Apr. 2021.
[9] H. Tarzamni and P. Kolahian, "High step-up DC–DC converter with efficient inductive utilization", IEEE Trans. Ind. Electron., vol. 67, no. 8, p.6602–6611, Aug. 2020.
[10] J. Narayanaswamy and S. Mandava, "Non-isolated multiport converter for renewable energy sources: A comprehensive review", Energies, vol. 16, no. 4, Art. no. 1834, Feb. 2023.
DOI: 10.3390/en16041834
[11] G. Pillonnet, M. Hmada, and P. P. Mercier, "Normalized benchmarking of hybrid switchedcapacitor DC–DC converters", arXiv:2305.06494, May 2023.
[12] S. A. Syed, M. A. Khan, and S. M. Abbas, "Analysis and efficiency evaluation of non-isolated DC–DC converter with wide input voltage range for PV application", Eng. Proc., vol. 20, no. 1, Art. no. 10, 2022.
[13] W. Adepoju and M. Sanyaolu, "Comprehensive analysis and experimental design of high-gain DC–DC boost converter topologies", arXiv:2412.18329, Dec. 2024.
[14] E. Paul and M. Sannasy, "Modeling and stability analysis of enhanced gain active switched inductor impedance source non-isolated DC–DC converter for PV applications", Electr. Eng., vol. 106, no. 3, p.1327–1341, May 2024.
[15] E. Martinez-Vera and P. Bañuelos-Sánchez, "Review of bidirectional DC–DC converters and trends in control techniques for applications in electric vehicles", IEEE Lat. Am. Trans., vol. 21, no. 5, p.885–894, May 2023.
[16] S. Kumar and R. C. Bansal, "Analysis and design of digitally controlled buck converter for low voltage applications", Int. J. Electron., vol. 107, no. 3, p.421–436, 2020.
[17] S. Singh and A. K. Verma, "Review of boost converter topologies for solar photovoltaic system", Renew. Sustain. Energy Rev., vol. 104, p.369–385, 2019.
[18] M. Almahdi and S. Mekhilef, "Review on non-inverting buck–boost converters: Topologies, characteristics and control", IET Power Electron., vol. 11, no. 6, p.914–926, 2018.
[19] A. Yadav and S. Jain, "Trends and developments in DC–DC converters for power management applications", IEEE Access, vol. 9, p.139570–139592, 2021.
[20] EPC Corporation, GaN-Based DC–DC Converters: High-Efficiency Buck Applications, EPC eBook, 2023.
[21] M. Xu and J. Sun, "Light-load efficiency optimization of buck converters using pulse skipping", IEEE Trans. Power Electron., vol. 21, no. 4, p.968–973, Jul. 2006.
[22] C. Lin et al., "Feedforward control for buck converter with improved line regulation", IEEE J. Emerg. Sel. Top. Power Electron., vol. 8, no. 4, p.3110–3119, Dec. 2020.
[23] Z. Li, H. Wang, and M. Zhang, "Digital dead-time compensation for GaN-based buck converters", IEEE Trans. Power Electron., vol. 36, no. 3, p.2867–2876, Mar. 2021.
[24] J. Park and G. Moon, "Compensating RHP zero in boost converters using feedforward methods", IEEE Trans. Power Electron., vol. 36, no. 5, p.4915–4924, May 2021.
[25] M. Frivaldsky et al., "Modeling and control strategy for interleaved boost converter with coupled inductor", Energies, vol. 16, no. 9, 2023.
[26] D. Liang and H.-B. Shin, "Coupled inductor design method for 2-phase interleaved boost converters", J. Power Electron., vol. 19, no. 2, p.344–352, Mar. 2019.
[27] N. M. Kumar and R. Krishnan, "Fuzzy and neural-based controller for boost converter in PV systems", Renew. Energy, vol. 140, p.270–282, Oct. 2019.
[28] Y. Hsieh and C. Lin, "Non-inverting buck–boost converter with synchronous control", IEEE Trans. Ind. Electron., vol. 67, no. 5, p.3830–3840, May 2020.
[29] M. Hossain et al., "Comparison of Si- and GaN-based buck–boost converters under wide input voltages", Electronics, vol. 13, no. 3, p.423–438, Jan. 2024.
[30] P. Patra and M. Dash, "Seamless transition control of buck–boost converter", IEEE Trans. Power Electron., vol. 35, no. 12, p.13551–13562, Dec. 2020.
[31] T. Mishra, A. Iyer, and B. Singh, "A review on non-isolated DC–DC converters for renewable energy applications", Renew. Sustain. Energy Rev., vol. 135, 2021.
[32] R. W. Erickson and D. Maksimović, Fundamentals of Power Electronics, 2nd ed., Springer, 2001.
[33] M. Cosetin et al., "Comparison of single stage SEPIC and integrated SEPIC–buck converter as off-line LED drivers", in Proc. Brazilian Power Electron. Conf., 2013, p.1134–1139.
[34] M. Cosetin et al., "Dimmable single-stage SEPIC–Cuk converter for LED lighting with reduced storage capacitor", in Proc. IEEE IAS Annu. Meeting, 2014, p.1–7.
[35] S. Ćuk and R. D. Middlebrook, "A general unified approach to modelling switching-converter power stages", in Proc. IEEE PESC, 1976.
[36] J. Sebastian, F. Soto, M. M. Hernando, and D. G. Lamar, "Study of the influence of converter structure and control strategy on the input current high-frequency harmonic content", IEEE Trans. Power Electron., vol. 19, no. 3, 2004.
[37] J. M. Alonso et al., "Analysis and design of the Zeta converter operating in DCM as a power factor corrector for high-brightness LED lamps", IEEE Trans. Ind. Electron., vol. 57, no. 8, p.2874–2883, Aug. 2010.
[38] A. B. Mukkapati, R. Kaur, V. Krishnasamy, and N. Satyanarayana, "Voltage regulation of quadratic boost converter with fixed frequency sliding mode controller", in Proc. ICEICE, 2017, p.1–6.
[39] M. K. Hajiabadi, A. Mosallanejad, and A. Salemnia, "Ultra-high gain quadratic boost DC–DC converter based on a three-winding coupled inductor with reduced voltage stress for fuel cellbased systems", IET Power Electron., vol. 16, no. 16, p.2666–2681, Sep. 2023.
DOI: 10.1049/pel2.12592
[40] S. Wasi, N. R. N. Idris, S. N. A. Wahab, and K. J. W. Mustaffa, "Interleaved quadratic boost DC–DC converter with high voltage gain capability", Electr. Eng., vol. 102, p.651–662, 2020.
[41] A. Ahmad, F. Z. Peng, and M. Rashid, "Quadratic boost derived hybrid multi-output converter", IET Power Electron., vol. 10, no. 10, p.1156–1163, 2017.
[42] Y. Jia, Y. Chen, S. Li, and J. Wang, "A high gain dual-cell quadratic boost converter for EV applications", ResearchGate preprint, 2018.
[43] S. Misal and M. Veerachary, "Analysis of a DC–DC quadratic type step-down converter for wider low voltage conversion", IET Power Electron., 2020.
[44] B. V. Anuraag, R. Mahalakshmi, S. Likhtih, P. Bhargavi, and A. Mohanty, "Design and comparative study of DC–DC quadratic buck–boost converter and cascaded buck–boost converter", in Proc. Int. Conf. Recent Trends Electr. Electron. Commun., 2021.
[45] S. Trakuldit, K. Tattiwong, and C. Bunlaksananusorn, "Design and evaluation of a quadratic buck converter", Energy Reports, 2021.
[46] R. T. Yadlapalli and A. Kotapati, "Analysis, design and implementation of a fixed frequency PWM-based sliding-mode controller for quadratic buck converter", Int. J. Power Electron., 2021.
[47] S. A. Gorji, "Reconfigurable quadratic converters for electrolyzers utilized in DC microgrids", IEEE Access, vol. 10, p.100605–100617, 2022.
[48] C. Torres-Pinzón et al., "Sliding-mode control of a quadratic buck converter with constant power load", IEEE Access, vol. 10, p.124930–124943, 2022.
[49] R. Zhao et al., "A switched-capacitor hybrid quadratic buck converter for 48V-input wide-range conversion", in Proc. 29th IEEE Int. Conf. Electronics Circuits and Systems (ICECS), 2022.
[50] G.-M. Jude and I.-M. Pop-Calimanu, "A novel hybrid quadratic buck converter", in Proc. Int. Symp. Electronics and Telecommunications (ISETC), 2022.
[51] H. Gholizadeh, S. A. Gorji, and D. Sera, "A quadratic buck–boost converter with continuous input and output currents", IEEE Access, vol. 11, p.43522–43533, 2023.
[52] A. Goudarzian, "Improved self-oscillating control of a quadratic buck converter for constant voltage applications", Asian J. Control, vol. 25, no. 3, p.1345–1356, 2023.
DOI: 10.1002/asjc.3129
[53] S. Azadi et al., "FCS-model predictive control of a quadratic buck converter for more efficient data centers", in Proc. 17th IEEE Int. Conf. Compatibility, Power Electron. and Power Engineering (CPE-POWERENG), 2023.
[54] Y. Zhao, H. Cen, J. Nie, Z. Liu, and Q. Cai, "Design and implementation of FPGA-based digitally controlled quadratic buck converter", in Proc. 24th Int. Conf. Electronic Packaging Technology (ICEPT), 2023.
[55] G. Li et al., "High step-down series-capacitor quadratic buck converter", in Proc. 8th IEEE Southern Power Electron. Conf. (SPEC), 2023.
[56] O. López-Santos et al., "Multi-loop sliding-mode control for a battery charger using a quadratic buck converter", in Proc. 8th IEEE Southern Power Electron. Conf. (SPEC), 2023.
[57] R. A. Acosta-Rodríguez et al., "Validation of passivity-based control and array PID in high-power quadratic buck converter through rapid prototyping", IEEE Access, vol. 12, p.12345–12358, 2024.
[58] R. A. Acosta-Rodríguez et al., "Validation of sliding mode and passivity control in high-power quadratic buck converter through rapid prototyping", IEEE Access, vol. 12, p.12359–12372, 2024.
[59] I. Reyes-Portillo et al., "Design and analysis of quadratic buck converter based on the reduced redundant power processing", IEEE J. Emerg. Sel. Top. Power Electron., 2024.
[60] V. K. Gupta and B. C. Mandi, "High-frequency digitally adaptive pulse skipping modulated voltage-mode controlled quadratic buck converter", Int. J. Circuit Theory Appl., vol. 52, no. 1, p.112–125, 2024.
DOI: 10.1002/cta.4247
[61] S. Trakuldit, K. Tattiwong, and C. Bunlaksananusorn, "Design and evaluation of a quadratic buck converter", Energy Reports, vol. 8, p.536–543, Nov. 2021.
[62] G.-M. Pop, I.-M. Pop-Calimanu, and D. Lascu, "Fourth-order quadratic buck converter controller design", Sensors, vol. 24, no. 2, Art. no. 557, Jan. 2024.
DOI: 10.3390/s24020557
[63] L. K. Muhammed and J. E. Paul, "A double quadratic buck converter", Int. J. Innov. Res. Electr. Electron. Instrum. Control Eng., vol. 4, no. 9, Sep. 2016.
[64] Rong et al., "High gain combined buck–boost Cuk converter with coupled inductance", IET Power Electron., 2022.
DOI: 10.1049/pel2.12220
[65] L. García Vite et al., "Quadratic buck–boost converter with reduced input-current ripple", IET Power Electron., vol. 12, 2019.
[66] M. Okati et al., "Transformerless quadratic buck–boost converter with continuous current ports", IET Power Electron., 2022.
DOI: 10.1049/pel2.12304
[67] A. Packnezhad et al., "Fully soft switched high step up/down bidirectional buck/boost converter", IET Power Electron., 2023.
DOI: 10.1049/pel2.12457
[68] I. H. Malick et al., "Implementation and reliability analysis of a new non-isolated quadratic buck–boost converter using improved Markov modelling", IET Renew. Power Gener., vol. 17, no. 11, Aug. 2023.
DOI: 10.1049/rpg2.12787
[69] A New Quadratic CUK Based Step Up DC/DC Converter Without Right Hand Plane Zero, Iran Univ. Tech., 2024.
[70] G. Yang and H. Li, "High gain coupled inductor quadratic Cuk converter", in Lecture Notes in Electrical Engineering, Springer, Nov. 2024.
[71] S. Behera et al., "Improved voltage gain L-impedance hybrid quadratic boost Cuk DC–DC converter (L-HQBC) for fuel cell application", in Proc. IEEE STPEC, Dec. 2023.
[72] H. Chen et al., "Tapped inductor bi-directional Cuk converter with high step-up/down conversion ratio and its optimum design", Sci. Rep., vol. 12, 2022.
[73] J. D. Navamani, A. Lavanya, and K. Vijayakumar, "Modified SEPIC converter with high boosting capability", Electron. Lett., vol. 55, no. 13, p.759–761, Jun. 2019.
DOI: 10.1049/el.2019.0836
[74] P. K. Maroti, S. Esmaeili, A. Iqbal, and M. Meraj, "High step-up single switch quadratic modified SEPIC converter for DC microgrid applications", IET Power Electron., vol. 13, no. 16, p.3717–3726, Dec. 2020.
[75] S. Esmaeili et al., "High gain magnetically coupled single switch quadratic modified SEPIC DC–DC converter", IEEE Trans. Ind. Appl., vol. 59, no. 3, p.3593–3604, May 2023.
[76] H. Hafezi, "New high step-up coupled dual winding quadratic enhanced SEPIC DC–DC converter", in Proc. IEEE SEST, Sep. 2021.
[77] A. Alfonzo et al., "A non-isolated hybrid Zeta converter with a high voltage gain and reduced size of components", Electronics, vol. 11, no. 3, Mar. 2022.
[78] A. M. Ali and T. K. Hassan, "Experimental validation of quadratic boost Zeta converter based on coat circuit", Int. J. Power Electron. Drive Syst., vol. 14, no. 4, p.2183–2194, Dec. 2023.
[79] M. Hosseinpour, M. Heydarvand, and M. R. E. Azizkandi, "A new positive output DC–DC buck–boost converter based on modified boost and ZETA converters", Sci. Rep., vol. 14, 2024.
[80] J. L. Duarte et al., "High step-down quadratic converters for electrolyzer applications", IEEE Trans. Power Electron., vol. 35, no. 12, p.12465–12475, Dec. 2020.
[81] A. Chub et al., "Single-switch buck quadratic topology with extended gain", IET Power Electron., vol. 14, no. 6, p.1214–1222, Jun. 2021.
[82] M. Pavic et al., "A low-ripple quadratic buck converter for LED drivers", IEEE Access, vol. 8, p.185293–185303, 2020.
[83] V. Pires, A. Foito, and J. F. Silva, "Quadratic boost–Cuk converter for fuel cell EVs", IEEE Trans. Veh. Technol., vol. 68, no. 8, p.7521–7530, Aug. 2019.
[84] F. L. Tofoli et al., "Survey on non-isolated high-voltage step-up converters", IET Power Electron., vol. 8, no. 11, p.2044–2057, Nov. 2015.
[85] M. Frivaldsky and D. Kovac, "Interleaved boost converter with coupled inductors", Energies, vol. 16, no. 9, 2023.
[86] Y. Hsieh and C. Lin, "Non-inverting synchronous buck–boost converter", IEEE Trans. Ind. Electron., vol. 67, no. 5, p.3830–3840, May 2020.
[87] M. Hossain et al., "GaN-based buck–boost converter for energy storage", Electronics, vol. 13, no. 3, 2024.
[88] P. Patra and M. Dash, "Seamless transition in buck–boost converters", IEEE Trans. Power Electron., vol. 35, no. 2, p.1470–1481, Feb. 2020.
[89] K. Jin, M. Yang, and X. Ruan, "A quadratic Ćuk converter for PV", IEEE Trans. Power Electron., vol. 26, no. 4, p.1146–1153, Apr. 2011.
[90] A. A. Fardoun, "Modified quadratic Ćuk converter with low stress", Energies, vol. 13, no. 1, Jan. 2020.
[91] A. Chub and D. Vinnikov, "Quadratic SEPIC converter for PV", IEEE J. Emerg. Sel. Top. Power Electron., vol. 5, no. 3, p.1232–1243, Sep. 2017.
[92] M. A. Khan, "Control of modified SEPIC quadratic converters for DC microgrids", IET Renew. Power Gener., vol. 13, no. 12, p.2207–2214, Dec. 2019.
[93] A. Valdez-Resendiz et al., "Low-ripple quadratic Zeta converter", IET Power Electron., vol. 11, no. 7, p.1306–1313, Jul. 2018.
[94] T. R. Lima et al., "Non-isolated Zeta-derived converter for renewable sources", IEEE Access, vol. 9, p.113302–113312, 2021.