A fast transient converter modified from a buck converter is proposed. It employs a stepping inductance method by which the output inductor of a buck converter is replaced by two inductors connecting in series. One has large inductance and the other has small inductance. An inductor with small inductance will take over the output inductor during transient load change and speed up dynamic response. In steady state, the large inductance takes over and keeps substantially small ripple current and minimizes RMS loss. An experiment of a 2 V DC-DC converter put under a 20 A transient load change demonstrates the merit of this approach. It is a low cost method applicable to converters with an output inductor.
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机译：提出了一种从降压转换器修改的快速瞬态转换器。它采用步进电感方法，通过该方法，降压转换器的输出电感器由串联连接的两个电感器代替。一个具有较大的电感，另一个具有小电感。电感小的电感器将在瞬态负载变化期间接管输出电感，加速动态响应。在稳态中，大电感接管并保持基本上小的纹波电流并最大限度地减少RMS损耗。在20个瞬态负载变化下放置2 V DC-DC转换器的实验证明了这种方法的优点。它是一种低成本的方法，适用于具有输出电感器的转换器。
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