Voltage Reference using OpAmp
The LT6200, per the data sheet is unity gain stable, so it will work "just fine". I use quotes for 2 reasons. First, with a gain bandwidth product of 165 MHz it is much faster than necessary, and as the saying goes, "Those who ask for more bandwidth than they need deserve what they get." In this case the penalty is that the follower will be more prone to oscillation than a slower op amp, and you'll need to be careful about layout and decoupling. Second, your voltage accuracy will be entirely dependent on the stability of your 5 volt supply, which is not normally a good approach to take.