7.3.3 Overcurrent Protection

The TPS61175 has a cycle-by-cycle overcurrent limit protection that turns off the power switch once the inductor current reaches the overcurrent limit threshold. The PWM circuitry resets itself at the beginning of the next switch cycle. During an overcurrent event, the output voltage begins to droop as a function of the load on the output. When the FB voltage drops lower than 0.9 V, the switching frequency is automatically reduced to 1/4 of the set value. The switching frequency does not reset until the overcurrent condition is removed. This feature is disabled during soft start.