SLVSAH5E December 2010 – May 2019 TPS57114-Q1
The TPS57114-Q1 device implements a cycle-by-cycle current limit. During each switching cycle, the device compares a voltage derived from the high-side switch current to the voltage on the COMP pin. When the instantaneous switch-current voltage intersects the COMP voltage, the high-side switch turns off. During overcurrent conditions that pull the output voltage low, the error amplifier responds by driving the COMP pin high, increasing the switch current. There is an internal clamp on the error-amplifier output. This clamp functions as a switch-current limit.