Fast transient response in DC-to-DC converters

#Aspects of the present disclosure are related to DC-to-DC converters. Specifically aspects of the present disclosure relate to DC-to-DC converters with Active Voltage Positioning (AVP).

#As microprocessors grow more complex over time and pack an increasing number of circuits, the power supplies are subject to more stringent performance requirements, especially for load transients.

#Key factors to measure the performance in DC-DC power converters for transient response are overshoot/undershoot, uniform shape and recovery or settling time. These factors are especially important in high-end applications such as CPUs, GPUs and telecommunication systems

#The teachings of the present disclosure can be readily understood by considering the following detailed description in conjunction with the accompanying drawings, in which:

#FIG. 1 is a circuit diagram of a prior art DC-to-DC converter without adaptive voltage positioning and transient control.

#FIG. 2A is a graph of load current vs time for a prior art DC-to-DC converter without adaptive voltage positioning and transient control.

#Although the following detailed description contains many specific details for the purposes of illustration, anyone of ordinary skill in the art will appreciate that many variations and alterations to the following details are within the scope of the invention. Accordingly, the exemplary embodiments of the invention described below are set forth without any loss of generality to, and without imposing limitations upon, the claimed invention.

#In the following Detailed Description, reference is made to the accompanying drawings, which form a part hereof, and in which is shown by way of illustration specific embodiments in which the invention may be practiced. In this regard, directional terminology, such as “top,” “bottom,” “front,” “back,” “leading,” “trailing,” etc., is used with reference to the orientation of the figure(s) being described. Because components of embodiments of the present invention can be positioned in a number of different orientations, the directional terminology is used for purposes of illustration and is in no way limiting. It is to be understood that other embodiments may be utilized and structural or logical changes may be made without departing from the scope of the present invention. The following detailed description, therefore, is not to be taken in a limiting sense, and the scope of the present invention is defined by the appended claims.

#In the interest of clarity, not all of the routine features of the implementations described herein are shown and described. It will be understood by those skilled in the art that in the development of any such implementations, numerous implementation-specific decisions must be made in order to achieve the developer's specific goals, such as compliance with application- and business-related constraints, and that these specific goals will vary from one implementation to another and from one developer to another. Moreover, it will be appreciated that such a development effort might be complex and time-consuming, but would nevertheless be a routine undertaking of engineering for those of ordinary skill in the art having the benefit of the present disclosure.