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 – 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 – 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 overcurrent condition is applied at the output