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Multiple Linear Power Controller with ACPI Control Interface

The HIP6502 complements either an HIP6020 or an HIP6021 in ACPI-compliant designs for microprocessor and computer applications. The IC integrates four linear controllers/regulators, switching, monitoring and control functions into a 20-pin SOIC package. One linear controller generates the 3.3VDUAL/3.3VSB voltage plane from the ATX supply’s 5VSB output, powering the south bridge and the PCI slots through an external pass transistor during sleep states (S3, S4/S5). A second transistor is used to switch in the ATX 3.3V output for operation during S0 and S1/S2 (active) operating states. Two linear controllers/regulators supply a choice of either or both of the computer system’s 2.5V or 3.3V memory power through external pass transistors in active states. During sleep states, integrated pass transistors supply the sleep power. Another controller powers up the 5VDUAL plane by switching in the ATX 5V output in active states, and the ATX 5VSB in sleep states.

Features

• Provides 5 ACPI-Controlled Voltages

- 5VDUAL USB/Keyboard/Mouse (Active/Sleep)

- 3.3VDUAL/3.3VSB PCI/Auxiliary/LAN (Active/Sleep)

- 2.5VMEM RDRAM (Active/Sleep)

- 3.3VMEM SDRAM (Active/Sleep)

- 2.5VCLK Clock/Processor Terminations (Active Only)

• Excellent Output Voltage Regulation

- 3.3VDUAL/3.3VSB Output: ±2.0 Over Temperature; Sleep State Only

- 2.5VMEM and 3.3VMEM Output: ±2.0 Over Temperature; Both Operational States (3.3VMEM in sleep only)

- 2.5VCLK Output: ±2.0 Over Temperature

• Small Size

- Very Low External Component Count

• Dual Memory Voltage Support Via MSEL Pin

- 2.5V for RDRAM Memory

- 3.3V for SDRAM Memory

- Both 2.5V and 3.3V for Flexible Systems

• Under-Voltage Monitoring of All Outputs with Centralized FAULT Reporting and Temperature Shutdown

Applications

• Motherboard Power Regulation for ACPI-Compliant Computers