Another way to enable lower I_Q is to enter different power-save modes depending on the load current. While the transition between these modes is usually automatic, the implementation and performance differ significantly. Two points of concern are the voltage ripple during the transition between power-save modes and the output-voltage accuracy. Because operating conditions (such as in an error amplifier) are usually different in each power-save mode, the transition time required to adjust to the different operating points can directly result in errors on the output voltage. Additionally, comparator delays will be longer at lower biasing currents, potentially causing inaccuracies for both the voltage threshold and zero-current detection, which could result in higher output-voltage ripple.