Analysis and simulation of same cycle transient control (SCTC) for application in voltage regulator modules (VRM)

A method to improve the transient response of a VRM is developed in this paper through Pspice simulation. By using another compensator converter with very quick response, a compensation current is injected or extracted according to the transient type. This compensation is triggered by comparators monitoring the output voltage to accomplish the same cycle transient control. The compensation current can be tailored for the main converter for best possible transient response. Each of these converters are optimized for a different purpose to obtain optimum overall performance. The tradeoff of speed, efficiency, and stability is thus resolved.