The device operates in on mode when the supply voltage is greater than the UVLO threshold and all of the following conditions are true:

• A high-level is applied to the EN pin.
• SWEN = 1 in the CONTROL1 register.
• The device junction temperature is below the thermal shutdown threshold.
• The supply voltage is below the OVLO threshold.

All functions are available in on mode.

The device leaves on mode and enters UVLO mode when the supply voltage decreases below the UVLO threshold. The device leaves on mode and enters standby mode when any of the following conditions is true:

• A low level is applied to the EN pin.
• SWEN = 0 in the CONTROL1 register.
• The device junction temperature is greater than the thermal shutdown threshold.
• The supply voltage is greater than the OVLO threshold.