SNVSA47C February 2016 – December 2020 LM5165
The internal bias rail LDO has a lower enable threshold than the regulator itself. When VEN is above 0.6 V and below the precision enable threshold (1.212 V typically), the internal LDO is on and regulating. The precision enable circuitry is turned on once the internal VCC is above its UV threshold. The switching action and voltage regulation are not enabled until VEN rises above the precision enable threshold.