SLVS875C January 2009 – November 2014 TPS54332
The device is recommended to operate with input voltages above 3.5 V. The typical VIN UVLO threshold is not specified and the device may operate at input voltages down to the UVLO voltage. At input voltages below the actual UVLO voltage, the device will not switch. If EN is externally pulled up or left floating, when VIN passes the UVLO threshold the device will become active. Switching will commenced when the soft-start sequence is initiated.