Gate drive of 270 μA typical is generated by an internal charge pump and current limiter. A separate supply, VDD, is provided to avoid having the large charge pump currents interfere with voltage sensing by the A and C pins. The GATE drive voltage is referenced to V(A) as GATE is only driven high when V(A) > V(C). The recommended capacitor on BYP (bypass) must be used in order to form a quiet supply for the internal high-speed comparator. V(GATE) must not exceed V(BYP).