Back-up power manager can support two supercapacitors

https://www.electronics-lab.com/back-up-power-manager-can-support-two-supercapacitors/

A complete supercapacitor back-up power management system for 2.9 to 5.5V supply rails is available from Analog Devices. The LTC4041 uses an on-chip bi-directional synchronous converter to provide high efficiency step-down supercapacitor charging. There is also high current, high efficiency boost back-up power. When external power is available, the device operates as a step-down battery […]