What does DAP SIZE in the package outline of MAX17681 mean?
DAP is an abbreviation for Die Attach Paddle. The dimension of DAP is usually the same as that of the exposed pad of the chip. Therefore, the size of DAP is not specified in the package outline of most of Maxim's products. However, the DAP dimension of the MAX17681 is larger than the exposed pad shown in the figure above. Therefore its size is indicated by dotted line in the package outline. The following figure is the figure of chip soldered to PCB, in which DAP and its connections are marked.