Refer to Table 4 and the following paragraphs for a detailed description of the functional modes for the LMS36x5-Q1.
These modes are controlled by the FPWM input as listed in Table 4. This input can be controlled by any compatible logic 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, the VIN pin, or the VCC pin, as desired. The FPWM pin must 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, using diode-emulation mode to allow DCM (see the Glossary).|