General Description

The RT9645 is a combo regulator which is compliant to ACPI specification for desktop/server power management and system application. The part features one switching regulator for DDR memory VDDQ power; a second PWM controller for GMCH core power, a LDO controller for FSB_ VTT termination, a LDO controller for 5VSB to 3VSB conversion; and a dual power control 5VDL for S0 and S3 system power.

Features

Integrated 5 Channels Power Regulator

DC/DC Buck PWM Regulator (Driver Included)

DC/DC Buck PWM Controller

Linear Regulator Controller for FSB_VTT Power

3.3VSB Linear Regulator Controller with 40mA Output Capability

5VDL Switch Control

Conform to ACPI Specification, Supporting Power Management at S0, S3, and S5 State

300kHz Fixed Frequency Oscillator

Low-Side RDS(ON) Current Sensing for Precision Over-Current Detection

Thermal Shutdown

Small 24-Lead VQFN Package

RoHS Compliant and 100% Lead (Pb)-Free

Applications

Desktop System Power

Server System Power