Please refer to Table 8-2 and the following paragraphs for a detailed description of the functional modes for the LM53625/35-Q1. These modes are controlled by the FPWM input as shown in Table 8-2. This input can be controlled by any compatible logic, and the mode changed, while the regulator is operating. If it is desired to fix the mode for a given application, the input can be either connected to ground, a logic supply, or the VCC pin, as desired. The maximum input voltage on this pin is 5.5 V; the FPWM pin should not be allowed to float.
|FPWM INPUT VOLTAGE||OPERATING MODE|
|> 1.5 V||Forced PWM: The regulator operates as a constant frequency, current mode, full-synchronous converter for all loads; without diode emulation.|
|< 0.4 V||AUTO: The regulator moves between PFM and PWM as the load current changes, utilizing diode-emulation mode to allow DCM (see the Glossary ).|