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the paper is discussed about the ripple regulators which use the hysteric comparators, and it is quite exist some ripple regulators that does not use a hysteric comparator, such as MC34063, and what do you think about these chips, and what factors did the designers think when they designed the 34063?
And ,would you mind to tell me why the ripple regulators have a improved transient response compared with the current mode or voltage mode controlled PWM chips?