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.

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

◆ Current limit protection on CORE

◆ Thermal protection

◆ Powergood flag with blanking during VID or

DeeperSleep mode changes

◆ Automatic powersave at light load

◆ TSSOP-28 and TSSOP-38 package options

Applications

◆ Low power Notebook and Laptop computers

◆ Embedded Applications