The LM5165-Q1 is in active mode when VEN is above the precision enable threshold and the internal bias rail is above its UV threshold. In COT active mode, the LM5165-Q1 is in one of three 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;
- 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. Refer to COT More Light-Load Operation for more detail;
- Frequency foldback mode to maintain output
regulation at low dropout and for improved load-on transient
response. Refer to Low Dropout Operation and 100% Duty Cycle
Mode for more detail.