Maxim describes how current limiting functions on their MAX5976 Hot-Swap IC. This chip is useful for hot-swap applications, it allows the safe insertion and removal of circuits while the power is applied.
Because the MAX5976 and similar devices use a single resistor to set soft-start and overcurrent protection levels, simple changes to the basic application circuit can accommodate complex loads with widely varying startup and running current requirements. It is easy to combine the high level of integration and performance of integrated load switches with sophisticated state-dependent overcurrent protection.