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