SC451ITSTRT

www.DataSheet4U.com Portable IMVP-IV™ and IMVP-IV+™ Single Phase Power Supply Controller POWER MANAGEMENT Description The SC451 PowerStep IV™ IC is a single chip high-performance Hysteretic PWM controller. With its integrated SmartDriver™, it powers advanced IMVP-IV™ and IMVP4+™ processors. The SC451 features extended Intel Mobile Voltage Positioning (IMVP™) to increase battery life by reducing the voltage at the processor when it is heavily loaded. It directly supports Intel’s SpeedStep® processors for even longer battery life. The SC451 fully supports the Intel® Geyserville-III core voltage specification. It provides direct “deeper sleep” mode and boot voltage support. Automatic “power-save” is present to prevent negative current flow in the low-side FET during light loading conditions, saving even more power. The high side driver initially turns on with a weak drive to reduce ringing, EMI, and capacitive turn-on of the low side. SC451 Features ‹ IMVP-IV™ and IMVP-IV+™ compliant single chip ‹ ‹ ‹ ‹ ‹ solution On chip CLK_ENABLE# and IMVP4_PWRGD outputs Backward compatible with SC1479 High speed hysteretic controller Single phase operation Selectable analog or VID controlled DeeperSleep setting ‹ 6 bit VID programmable output ‹ Integrated drivers with soft high side turn-on ‹ Programmable softstart ‹ Programmable boot voltage ‹ Programmable DeeperSleep voltage ‹ Under-voltage lock out on VccA ‹ Over-voltage protection on CORE A 6-bit DAC, accurate to 0.85%, sets the outp...