General Description

The RT9643 is a combo regulator which is compliant to ACPI specification for desktop/motherboard power

management and system application.

Features

Integrated 5 Channels Power Regulator

`DC/DC Buck PWM Regulator for VDDQ(2.5V or 1.8V)

`Linear Regulator Supports 1.5Amp Peak Sinking/

Sourcing Capability for VTT

`1.2V Ultra-Low-Dropout Linear Controller for GMCH VTT Power

`3.3VSB Linear Regulator Supports 1.25A Capability

`5VDL Switch Control

`3VDL Switch Control

Conform to ACPI Specification

` Support Power Management at S0, S3, and S5 State

300kHz Fixed Frequency Switching

RDS(ON)Current Sensing or Optional Current Sense Resistor for Precision Over Current Detect

Embedded Synchronous Boot-Strapped Diode

Power Good Signal Indication for All Voltages

Thermal Shutdown

24-Lead VQFN Package

RoHS Compliant and 100 Lead (Pb)-Free

Applications

DDR VDDQ and VTT Voltage Generator with ACPI Support

Desktop System Power

Servers System Power