부산대학교 도서관

Recent fast-evolving mobile system demands high bandwidth and low power consumption, necessitating extension of LPDDR3 beyond 1.6 Gbps. This demand, however, brings significant technical challenges from the perspective of signal and power integrity. A simple way of mitigating signal integrity issue at the challenging speed is to use ODT (On-Die Termination). Since ODT significantly increase power consumption, the use of ODT is not an attractive solution in a mobile system which considers low power consumption as primary metric. Thus, comprehensive design optimization with given design constraint is a practical solution which can avoid penalty of power consumption in the mobile system. In this paper, we have demonstrated design success of stretched LPDDR3 up to 2.133Gbps by applying rigorous design optimization based on comprehensive PI-aware SI analysis. It includes signal quality improvement and power delivery optimization. The Both metrics are organically considered during optimization process to achieve successful system operation up to 2.133Gbps without additional power consumption by ODT use.