It comes out on the corner of Eldon St and Blomfield St (assuming you mean straight on keeping the Boots on your right, I don't know where the tunnel to the right of Boots goes, from the map it looks like it comes out on Sun St Passage although I don't know whether that is step free and bike friendly).
If you look on Google Maps it's listed as
"
4 Way out
Broadgate
"
Although it's been a while since I've been there and the Crossrail works may have messed all of this up...