How can I suppress inrush current with a load switch IC?

To suppress the inrush current that occurs when the load switch IC is enabled, use a load switch IC with an inrush current limiting function, which suppresses the current flowing to the capacitor connected to the output terminal (VOUT) by slowing turning on the output-stage transistor. The inrush current limiting function is also called a soft-start, slow-start, or slew rate control function.

Figure 1 Example of an inrush current limiting operation
Figure 1 Example of an inrush current limiting operation
Figure 2 Example of an operation without inrush current limiting
Figure 2 Example of an operation without inrush current limiting

Please also refer to the following documents for related explanations.

Application note

FAQ

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Main web page about load switch ICs

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