ISL6557A

ISL6557A NcO1oN-T8nO8Rt8aRE-cICEtNCOoTuOEMrRMMTSMeEIcLNEhNDonDEricDEwaDwlFSwORu.REipnPpNtLeoEArrWstCiClE.DceMEonEmSteNI/GrtTsaNctS Multiphase PWM Controller for CORE Voltage Regulation DATASHEET FN9068 Rev 3.00 July 2004 The ISL6557A provides core-voltage regulation by driving up to four interleaved synchronous-rectified buck-converter channels in parallel. Intersil multi-phase controllers together with Intersil MOSFET drivers form the basis for the most reliable power-suppply solutions available to power the latest industry-leading microprocessors. Multi-phase buck converter architecture uses interleaved timing to multiply ripple frequency and reduce input and output ripple currents. Lower ripple results in lower total component cost, reduced dissipation, and smaller implementation area. Preconfigured for 4-phase operation, the ISL6557A offers the flexibility of selectable 2- or 3-phase operation. Simply connect the unused PWM pins to VCC. The channel switching frequency is adjust...