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IR drop is a fundamental constraint required by almost all chip designs. However, its evaluation usually takes a long time that hinders mitigation techniques for fixing its violations. In this work, we develop a fast dynamic IR drop estimation technique, named PowerNet, based on a convolutional neural network (CNN). It can handle both vector-based and vectorless IR analyses. Moreover, the proposed CNN model is general and transferable to different designs. This is in contrast to most existing machine learning (ML) approaches, where a model is applicable only to a specific design. Experimental results show that PowerNet outperforms the latest ML method by 9&#x0025; in accuracy for the challenging case of vectorless IR drop and achieves a 30&#x00D7; speedup compared to an accurate IR drop commercial tool. Further, a mitigation tool guided by PowerNet reduces IR drop hotspots by 26&#x0025; and 31&#x0025; on two industrial designs, respectively, with very limited modification on their power grids.

PowerNet: Transferable Dynamic IR Drop Estimation via Maximum Convolutional Neural Network