The fuse electronization changes the design?

The figure below shows a simulated waveform when TCKE812 is supplying power of 12V and the output voltage is shorted steeply. Since the short-circuit detection current of eFuse IC is set by an external resistor, the detection current can be set with higher accuracy than a conventional fuse that uses heat generation.
When current flow reach at the short-circuit detection value, eFuse IC judges the short-circuit state (this state is also called as Fast Trip or Short Trip) and shut down the output current.

The overcurrent clamping function clamps (holds) the output current so as not to exceed the clamping limit value when the output current increases due to a load abnormality or short-circuit, etc., and protects against deterioration or destruction caused by heat generation of the device itself as well as preventing instantaneous power-off.
The clamping limit value is 62.5% of the short-circuit detection value. The optimum settings can be set according to the system. A robust design can be achieved by having a double overcurrent protection function in conjunction with a short-circuit protection function that operates when the output current exceeds the limit value significantly in a very short period of time.

TCKE8xx series can be clamped from low temperature to high temperature with high accuracy, and its accuracy is ±11%. This accuracy improves the degree of freedom in designing/selecting the components to be mounted. In addition, when the load at the subsequent stage fluctuates, the normal overcurrent protection function (circuit break) stops the output current immediately when the current reaches overcurrent limit value, and the output voltage drops.
On the other hand, eFuse IC clamps the current so that the current does not exceed the limit, so that a more stable power supply can be configured by keeping the output voltage within the withstand voltage of the subsequent IC while keeping the output voltage.