SBVS233B January 2016 – June 2021 TPS7A84
The undervoltage lockout (UVLO) circuit monitors the input and bias voltage (VIN and VBIAS, respectively) to prevent the device from turning on before VIN and VBIAS rise above the lockout voltage. The UVLO circuit also disables the output of the device when VIN or VBIAS fall below the lockout voltage. The UVLO circuit responds quickly to glitches on VIN or VBIAS and attempts to disable the output of the device if either of these rails collapse. As a result of the fast response time of the input supply UVLO circuit, fast and short line transients well below the input supply UVLO falling threshold can cause momentary glitches when asserted or when recovered from the transient. See the Section 8 section for more details.