Dual PWM Controller For Powering AMD SVI Split-Plane Processors

The ISL6328 dual PWM controller delivers high efficiency and tight regulation from two synchronous buck DC/DC converters. The ISL6328 supports power control of AMD processors, which operate from a serial VID interface (SVI). The dual output ISL6328 features a multi-phase controller to support the Core voltage (VDD) and a single phase controller to power the Northbridge (VDDNB).

FEATUREs
• Processor Core Voltage Via Integrated Multi-Phase Power Conversion
• Configuration Flexibility
- 1 or 2-Phase Operation with Internal Drivers
- 3 or 4-Phase Operation with External PWM Drivers
• PSI_L Support
- Phase Shedding for Improved Efficiency at Light Load
- Diode Emulation in PSI mode
- Gate Voltage Optimization
• Precision Core Voltage Regulation
- Differential Remote Voltage Sensing
- ±0.6% System Accuracy Over-Temperature
• Optimal Processor Core Voltage Transient Response
- Adaptive Phase Alignment (APA)
- Active Pulse Positioning Modulation
• Fully Differential, Continuous DCR Current Sensing
- Accurate Load Line Programming
- Precision Channel Current Balancing
- Temperature Compensated
• Serial VID interface Handles up to 3.4MHz Clock Rates
• Two Level Overcurrent Protection Allows for High Current Throttling (IDD_SPIKE)
• Multi-tiered Overvoltage Protection
• Selectable Switching Frequency up to 1MHz
• Simultaneous Digital Soft-Start of Both Outputs