The LM74501-Q1 has an enable pin, EN. The enable pin allows for the gate driver to be either enabled or disabled by an external signal. If the EN pin voltage is greater than the rising threshold, the gate driver and charge pump operates as described in Gate Driver and Charge Pump sections. If the enable pin voltage is less than the input low threshold, the charge pump and gate driver are disabled placing the LM74501-Q1 in shutdown mode. The EN pin can withstand a voltage as large as 65 V and as low as –18 V. This feature allows for the EN pin to be connected directly to the SOURCE pin if enable functionality is not needed. In conditions where EN is left floating, the internal sink current of 1 μA pulls the EN pin low and disables the device.