I'm using 1 HMC980 to generate the -2.5 volts for itself and 3 other HMC980s. It seems that the voltage generated is being dragged down to about -2.1 volts. Is it possible that the total quiescent current of the four chips is too much?
Will this be an issue for proper HMC980 operation? How much current should I expect them to draw.?