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