The LM516x-Q1 is in active mode when VEN/UVLO is above the precision
enable threshold and the internal bias rail is above its UV threshold. In COT active
mode, the LM516x-Q1 is in one of the
following modes depending on the load current:
- CCM with fixed switching frequency when load current is above half of the peak-to-peak inductor current ripple
- Auto mode (P device designator)– light load
operation: Pulse skipping and diode emulation mode (DEM) when the load current
is less than half of the peak-to-peak inductor current ripple in CCM
operation.
- FPWM mode (F device designator)–
light load operation: Continuous conduction mode (CCM) throughout the entire
load current range, including when the load current is lower than half of the
inductor current ripple
- Current limit CCM with peak and valley current
limit protection when an over-current condition is applied at the output