The IR3081A Control IC combined with an IR XPhaseTM Phase IC provides a full featured and flexible way to implement a complete VR 10 power solution. The "Control" IC provides overall system control and interfaces with any number of "Phase ICs" which each drive and monitor a single phase of a multiphase converter. The XPhaseTM architecture results in a power supply that is smaller, less expensive, and easier to design while providing higher efficiency than conventional approaches. The IR3081A is intended for VRD 10 or VRM/EVRD 10 applications that use external VCCVID/VTT circuits. The IR3081A is functionally equivalent to the IR3081, but incorporates the following modifications: Under Voltage Lockout start threshold increased from 9.1V to 9.7V (typical) and hysteresis increased from 200mV to 800mV (typical). Hysteresis (52mV typical) added to the SS/DEL comparator to prevent Power Good output chatter. Over current discharge current increased from 6uA to 40uA (typical) to reduce the over current delay time.