IR3081A

IR3081A DATA SHEET XPHASETM VR 10 CONTROL IC DESCRIPTION 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. IIN pin precondition circuit added to disable current sharing in the phase ICs during soft start. www.DataSheet4U.com FEATURES 6 bit VR 10 compatible VID with 0.5% overall system accuracy 1 to X phases operation with matching phase ICs Programmable Dynamic VID Slew Rate No Discharge of output capacitors during Dynamic VID step-down (can be disabled) +/-300mV Differential Remote Sen...