SLVS892F December 2008 – April 2019 TPS61175
An undervoltage lockout circuit prevents mis-operation of the device at input voltages below 2.5-V (typical). When the input voltage is below the undervoltage threshold, the device remains off, and the internal switch FET is turned off. The UVLO threshold is set below minimum operating voltage of 2.9 V to avoid any transient VIN dip triggering the UVLO and causing the device to reset. For the input voltages between UVLO threshold and 2.9 V, the device attempts to operate, but the specifications are not ensured.