Depending on the circuit
implementation, up to three independent undervoltage lockout (UVLO) voltage circuits
can be active. An internally set UVLO on the input supply (IN pin) and the bias
supply (BIAS pin) automatically disables the LDO when the input voltage reaches the
minimum threshold. A precision EN function (EN pin) can also be used as a
user-programmable UVLO.
- The internal input supply voltage
UVLO circuit prevents the regulator from turning on when the input voltage is
not high enough, see the Section 6.5 table for more details.
- The internal bias supply voltage
UVLO circuit prevents the regulator from turning on when the bias voltage is not
high enough, see the Section 6.5 table for more details.
- The precision enable circuit
allows a simple sequencing of multiple power supplies with a resistor divider
from another supply. This enable circuit can be used to set an external UVLO
voltage at which the device is enabled using a resistor divider on the EN pin;
see the Section 8.1.1 section for more details.