Click Image > Mode > Grayscale (if the image is not already grayscale).
Click Filter > Pixelate > Color Halftone
Set the dot size you want, and set the Channel 1 value to 0. Ignore the others as they won’t be used anyway.
After you have finished, you can convert the document back to RGB mode if you need to add colour elements.
Only problem with this is that it seems to create a white square grid pattern over the face. I’ve no idea what’s causing that, so this PS filter might not be the best.