Buck regulator and two inductors make dual-polarity converter - EDN
Dual Buck-Boost Converter
Monolithic, Dual 3A Input/Output Buck with 3V–36V Operating Range Simplifies and Shrinks DC/DC Converters in Automotive, Industrial and Distributed Power Applications | Analog Devices
CoCocina 3Pcs Dd39Ajpa 2 in 1 20W Boost Buck Dual Output Voltage Module 3.6-30V to ±3-30V Adjustable Output Dc Step Up Step Down Converter Board, Screwdriver Sets - Amazon Canada
Electronics | Free Full-Text | A Dual-Buck-Boost DC–DC/AC Universal Converter
High Gain Buck–Boost Converter for Solar Photovoltaic (PV) System | SpringerLink