Non-load-balance-dependent high efficiency single-inductor multiple-output (SIMO) DC-DC converters

A single-inductor multiple-output (SIMO) DC-DC converter providing buck and boost outputs with a new control topology is presented. In the proposed switching sequence, which does not require any special blocks, energy delivery is always accomplished by flowing energy through an inductor, which leads to high conversion efficiency regardless of the balance between the buck and boost output loads. Implemented in 0.35-μm CMOS, the proposed SIMO DC-DC converter achieves high conversion efficiency regardless of the load balance between the outputs. The measured maximum efficiency reaches 82 % under heavy loads.

[1]  Gyu-Hyeong Cho,et al.  Load-Independent Control of Switching DC-DC Converters with Freewheeling Current Feedback , 2008, 2008 IEEE International Solid-State Circuits Conference - Digest of Technical Papers.

[2]  Gabriel A. Rincón-Mora,et al.  Single-Inductor–Multiple-Output Switching DC–DC Converters , 2009, IEEE Transactions on Circuits and Systems II: Express Briefs.

[3]  Chi-Ying Tsui,et al.  A pseudo-CCM/DCM SIMO switching converter with freewheel switching , 2002, 2002 IEEE International Solid-State Circuits Conference. Digest of Technical Papers (Cat. No.02CH37315).

[4]  Gyu-Hyeong Cho,et al.  A Single-Inductor Switching DC–DC Converter With Five Outputs and Ordered Power-Distributive Control , 2007, IEEE Journal of Solid-State Circuits.

[5]  Ke-Horng Chen,et al.  Single-Inductor Multi-Output (SIMO) DC-DC Converters With High Light-Load Efficiency and Minimized Cross-Regulation for Portable Devices , 2009, IEEE Journal of Solid-State Circuits.

[6]  Gyu-Hyeong Cho,et al.  A Single-Inductor Step-Up DC-DC Switching Converter With Bipolar Outputs for Active Matrix OLED Mobile Display Panels , 2009, IEEE J. Solid State Circuits.

[7]  Chi-Ying Tsui,et al.  Single-inductor multiple-output switching converters with time-multiplexing control in discontinuous conduction mode , 2003, IEEE J. Solid State Circuits.

[8]  Min-Chul Lee,et al.  A Single-Inductor Step-Up DC-DC Switching Converter with Bipolar Outputs for Active Matrix OLED Mobile Display Panels , 2007, 2007 IEEE International Solid-State Circuits Conference. Digest of Technical Papers.