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

Applications
◆ Advanced Intel microprocessors