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Current which is used to operate the regulator chip and is not delivered to the load. The quiescent current IQ is defined as the supply current used by the regulator itself that does not pass into the load. It typically includes all bias currents required by the LDO and any drive current for the pass transistor. Initialization The uP automatically initiates upon the receipt of supply voltage and power voltage.
Pulling VEN lower than 0. Pulling VEN higher than 1. The uP features soft start function that limits inrush current for charging the output capacitors. The soft start time is typically 4ms. Figure 1. Typical application of 2. If the output continuously demands more current than the maximum current, output voltage will eventually drops below its nominal value. This, in turns, will lower its OCP threshold level.
This will limit power dissipation in the device when over current limit happens. When output short circuit occurs, the uP will try to rebuild the output voltage with maximum allowable current as shown if Figure 3.