I have 3v dc going into a dc/dc converter which I verified is outputting 5.04v. The 5.04v is being fed into a li ion battery charger IC that outputs 4.21v to charge a battery. Again, I have verified the output. My li ion battery is obviously connected to this output to charge it. This is where things go wrong... The 4.21v output is not only connected to the positive terminal on the battery, but it also connected to another dc/dc converter so I can boost the 4.21v to 5v so I can charge my ipod and Blackberry. For some reason, the output is roughly the volatage of my li ion battery (3.7v). I have switched out the dc/dc converters, inductors, resisitors, and capacitors in an attempt to find the issue. The results are the same 3.7v instead of the expected 5v? Is there something with combing the 2 dc/dc converters that puts a wrinkle into this? Help...