SC1474 Datasheet PDF - Semtech Corporation
Semtech Corporation
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
â—† IMVP3 compliant single chip solution
â—† High speed Dual phase hysteretic controller
â—† VID programmable output
â—† Dual integrated 2A/4A drivers
â—† Integrated VID regulator controller
â—† Automatic performance/battery mode detection
â—† Dynamic phase current matching
â—† Under-voltage lock out on all Vcc inputs
â—† Over-voltage protection on CORE
â—† Current Limit protection on CORE
â—† Thermal protection
â—† Programmable soft-start
â—† Powergood flag with blanking during VID changes
â—† Automatic powersave at light load
â—† TSSOP-38 package
â—† Industrial temperature range
APPLICATIONs
â—† Advanced Intel microprocessors
