Undervoltage lockout programming pin. If the UVLO pin voltage is below 0.4 V, the
regulator is in the shutdown mode with all functions disabled. If the UVLO pin voltage is
greater than 0.4 V and less than 1.25 V, the regulator is in standby mode with the VCC
I regulator operational, the SS pin grounded, and no switching at the HO and LO outputs. If the UVLO pin voltage is above 1.25 V, the SS pin is allowed to ramp and pulse width
modulated gate drive signals are delivered to the HO and LO pins. A 20μA current
source is enabled when UVLO exceeds 1.25 V and flows through the external UVLO
resistors to provide hysteresis.
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