Single Phase Power Supply Controller
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Portable IMVP-IV™ and IMVP-IV+™ Single Phase Power Supply Controller
POWER MANAGEMENT Description
T...
Description
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...
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