Here is a summary of the LTC3128’s performance advantages compared to more complicated multi-chip alternatives: Monolithic bi-directional step-up/step-down supercap charging solution using only 1 inductor. Automatic active cell balancing while charging at full current - no balance resistors are required, also eliminates the need for precisely matched capacitors. Supercap cell voltage regulation & clamping/limiting. Very accurate Input current limit - enables users to maximize the power capability of whatever source they are operating from without exceeding safe limits. High charge current capability of 3A and lowest overall quiescent current can support other loads connected to the RSEN pin and limit total power source current to 3A. The MAXV function adds another layer of protection – it allows the user to set and continuously monitor the voltage across each cap in the stack. It is one of the smallest, simplest and easiest-to-use solutions.