What\s the impact of low dropout on the LDO regulator\s output voltage?
With an LDO, the difference between input voltage and output voltage is often kept small, to minimize power loss, so the output voltage must be tightly regulated to be sure the input voltage is sufficient to assure regulation. Plus, transient response must be fast enough to handle loads that can go from zero to tens of amperes in nanoseconds, and still keep the output in regulation. The accuracy of the output voltage is affected by changes in input voltage, output load current, and temperature. Temperature changes cause output voltage variation because of the effects of temperature on LDO voltage reference, error amplifier, and its sampling resistors (R1 and R2).
