ISL6548A中文资料ACPI 稳压器/控制器，用于双通道 DDR 存储系统数据手册Renesas规格书

描述 Description

The ISL6548A provides a complete ACPI compliant power solution for up to 4 DIMM dual channel DDR/DDR2 Memory systems. Included are both a synchronous buck controller to supply VDDQ during S0/S1 and S3 states. During S0/S1 state, a fully integrated sink-source regulator generates an accurate (VDDQ/2) high current VTT voltage without the need for a negative supply. A second PWM controller, which requires external MOSFET drivers, is available for regulation of the GMCH Core voltage. A sink/source LDO controller is also integrated for the CPU/GMCH VTT termination voltage regulation. Another LDO is available for the ICH7 voltage.
The switching PWM controller drives two N-Channel MOSFETs in a synchronous-rectified buck converter topology. The synchronous buck converter uses voltagemode control with fast transient response. The switching regulator provides a maximum static regulation tolerance of ±2% over line, load, and temperature ranges. The output is user-adjustable by means of external resistors down to 0.8V.
An integrated soft-start feature brings all outputs into regulation in a controlled manner when returning to S0/S1 state from any sleep state. During S0 the VIDPGD signal indicates that the GMCH and CPU VTT termination voltage is within spec and operational.
All outputs, except VICH7, have undervoltage protection. The switching regulator also has overvoltage and overcurrent protection. Thermal shutdown is integrated.

特性 Features

• Generates 5 Regulated Voltages
• 3A Integrated Sink/Source Linear Regulator with Accurate VDDQ/2 Divider Reference for DDR VTT
• Sink/Source LDO Regulator for CPU/GMCH VTT Termination
• ACPI compliant sleep state control
• VDDQ PWM Controller Drives Low Cost N-Channel MOSFETs
• Both PWM controllers are Phase Shifted 180°
• All Outputs: ±2% Over Temperature
• Simple Single-Loop Voltage-Mode PWM Control Design
• Under and Overvoltage Monitoring
• Integrated Thermal Shutdown Protection
• Pb-Free Plus Anneal Available (RoHS Compliant)

应用 Application

• Single and Dual Channel DDR Memory Power Systems in ACPI compliant PCs
• ASIC power supplies
• DSP supplies