ISL6548 Datasheet | Renesas

NOT REMENDED FOR NEW DESIGNS NO REMENDED REPLACEMENT contact our Technical Support Center at 1-888-INTERSIL or .intersil./tsc ACPI Regulator/Controller for Dual Channel DDR Memory Systems FN9188 Rev 2.00 January 3, 2006 VDDQ DDR_VTTSNS DRIVE2_U FB2 VIDPGD DRIVE2_L VREF_IN The ISL6548 provides a plete ACPI pliant power solution for up to 4 DIMM dual channel DDR/DDR2 Memory systems. Included are both a synchronous buck controller to supply VDDQ during S0/S1 and S3 states. During S0/S1 state, a fully integrated sink-source regulator generates an accurate (VDDQ/2) high current VTT voltage without the need for a negative supply. Two LDO controllers are also integrated for the GMCH core voltage regulation and for the GMCH/CPU VTT termination voltage regulation. The switching PWM controller drives two N-Channel MOSFETs in a synchronous-rectified buck converter topology. The synchronous buck converter uses voltagemode control with fast transient...