SC1474

www.DataSheet4U.com Portable Pentium Dual Phase Power Supply Controller ® SC1474 POWER MANAGEMENT Description The SC1474 PowerStep III™ IC is a single chip high-performance Hysteretic PWM controller. With dual integrated Smart™ Drivers, it powers advanced Pentium® 4 processors. The SC1474 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™ requirements for even longer battery life. The SC1474 automatically detects performance and battery mode VIDs. In addition, it integrates direct “deeper sleep” mode support. All operating modes incorporate automatic “power-save” to prevent negative current flow in the low-side FET during light loading conditions, saving even more power. Features IMVP3 compliant single chip solution High speed Dual phase hysteretic controller VID programmable output Dual integrated 2A/4A drivers Integrated VID regulator controller Automatic performance/battery mode detection Dynamic phase current matching Under-voltage lock out on all Vcc inputs Over-voltage protection on CORE Current Limit protection on CORE Thermal protection Programmable soft-start Powergood flag with blanking during VID changes Automatic powersave at light load TSSOP-38 package Industrial temperature range ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ A 5-bit DAC, accurate to 0.85%, sets the output voltage ‹ reference, and implements the 0.600V to 1.750V range ‹ req...