The TPS62147 is protected against overload and short circuit events. If the inductor current exceeds the current limit I(LIMF), the high side switch is turned off and the low side switch is turned on to ramp down the inductor current. After the switch current limit is triggered for 512 switching cycles, the device stops switching. After a typical delay of 800 µs, the device begins a new soft-start cycle. This is called HICCUP short circuit protection. TPS62147 repeats this mode until the short circuit condition disappears.

Due to internal propagation delay, the actual current can exceed the static current limit during that time. The equations given under Current Limit And Short Circuit Protection (for TPS62148) also apply.