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