高性能DC-DC转换器接地布线指南

高性能DC-DC转换器接地布线指南www.fairchildsemi.com

AN-42036
PCB Grounding System and FAN2001/FAN2011 High Performance DC-DC Converters
Introduction
Ground wiring can often limit system performance. The purpose of this application note is to help the system designer utilize the benefits of the FAN2011 and FAN2001 families of high performance step-down DC-DC regulators, to avoid PCB layout related problems and maximize overall system performance. The basic concept of “star grounding” is presented and ways of implementing star grounding for systems like a cell phone, are shown. overall output voltage accuracy are affected by this noise. Another related issue of the ground system is its tendency to carry inductively induced currents. Since the ground system can be spatially extended, it is possible to generate circulatin