SC2516

Complete Three-in-One DDR www.DataSheet4U.com Power Solution With BF_CUT POWER MANAGEMENT Description The SC2516 is a fully integrated, Three-in-One DDR Controller supplying power to the VDDQ, VTT and GMCH rails. Two synchronous buck controller provide the VDDQ and GMCH at high efficiency, while an internal linear regulator supplies the termination voltage with 1.8A(min) Source/Sink capability. The SC2516 uses the Intel® defined Latched BF_Cut signal to comply with motherboard state transitions. The regulator uses the 5VDUAL rail to supply VDDQ under all motherboard states, via the VDDQ switcher. The GMCH regulator is slaved off the 5V main regulator, using a separate UVLO on that rail. Additional logic and supervisory circuitry complete the functionality of this single chip DDR power solution in compliance with ACPI requirements. thermal impedance while keeping small footprint. VDDQ short circuit protection along with VTT current limit as well as two independent thermal shutdown circuits assure safe operation under all fault conditions. SC2516 Features ‹ Uses Latched BF_Cut from Intel Glue Chip to control regulators ‹ External VDDQ divider allows DDRI or DDRII Compatibility ‹ High efficiency VDDQ switcher ‹ External GMCH divider allows 1.5V or 1.25V pro‹ ‹ gramming High efficiency GMCH switcher supplies programmed output from the 5V or 3.3V rail Single chip solution complies fully with ACPI power sequencing specifications 1.8A (min) VTT Source/Sink capability High curren...