Description

The SC1476 PowerStep™ IV IC is a single chip high-performance hysteretic PWM controller. With its integrated SmartDriver™, it powers advanced IMVP-IV processors. The SC1476 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® SpeedStep™ processors for even longer battery life. The SC1476 fully supports Intel’s Geyserville-III core voltage specification. It provides direct “deeper sleep” mode and boot voltage support. Automatic “power-save” is present to prevent negative current flow in the low-side FET during light loading conditions, saving even more power. The high side driver initially turns on with a weak drive to reduce ringing, EMI, and capacitive turn-on of the low side.

Features

♦ IMVP-IV compliant single chip solution

♦ High speed hysteretic controller

♦ 6 bit VID programmable output

♦ Integrated drivers with soft high side turn-on

♦ Programmable softstart

♦ Programmable boot voltage

♦ Programmable DeeperSleep voltage

♦ Dynamic phase current matching

♦ Under-voltage lockout 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

♦ Slew rate limited DAC

♦ TSSOP-38 package

Applications

♦ Notebook and Laptop computers