General Description
The RT9641A/B, paired with either the RT9230 or RT9231 simplifies the implementation of ACPI-compliant designs in microprocessor and computer applications. The IC integrates two linear controllers and a low-current pass transistor, as well as the monitoring and control functions into a 16-pin SOIC package.
   
Features
● Provides 3 ACPI-Controlled Voltages
    − 5V Active/Sleep(5VDUAL)
● 3.3V Active/Sleep(3.3VDUAL)
    − 2.5V/3.3V Active/Sleep(VMEM) with RT9641A
    − 2.6V/3.43V Active and 2.5V/3.3V Sleep(VMEM)
        with RT9641B
● Simple Control Design
    − No Compensation Required
● Excellent Output Voltage Accuracy
    − 3.3VDUALOutput： ±2.0%； Sleep States Only
    − 2.5V/3.3V (2.6V/3.43V) Output： ±2.0%；
        Both Operational States
● Fixed Output Voltages Require No Precision
    External Resistors
● Small Size
    − Small External Component Count
● Selectable 2.5V/3.3V (2.6/3.43) VMEM Output
    Voltage via FAULT/MSEL Pin
    − 2.5V/2.6V for RDRAM Memory
    − 3.3V/3.43V for SDRAM Memory
● Under-voltage Monitoring of All Outputs with
    Centralized FAULT Reporting
● Adjustable Soft-start Function Eliminates 5VSB
    Perturbations