The LM61430-Q1 is in active mode whenever the EN pin is above V_EN, V_IN is high enough to satisfy V_{IN_OPERATE}, and no other fault conditions are present. The simplest way to enable the operation is to connect the EN pin to V_IN which allows self start-up when the applied input voltage exceeds the minimum V_{IN_OPERATE}.

In active mode, depending on the load current, input voltage, and output voltage, the LM61430-Q1 is in one of four modes:

• AUTO Mode - Light-Load Operation: Discontinuous conduction mode (DCM) when the load current is lower than half of the inductor current ripple. PFM when switching frequency is decreased at very light load.
• FPWM Mode - Light-Load Operation: Continuous conduction mode (CCM) with fixed switching frequency when load current is below half of the inductor current ripple.
• Minimum on time: At high input voltage, low output voltages the switching frequency is reduced to maintain regulation.
• Dropout mode: When switching frequency is reduced to minimize voltage dropout.