ISL6328CRZ Renesas

NOT RECOMMENDED FOR NEW DESIGNS NO RECOMMENDED REPLACEMENT contact our Technical Support Center at 1-888-INTERSIL or www.intersil.com/tsc DATASHEET ISL6328 FN7621 Rev 1.00 Dual PWM Controller For Powering AMD SVI Split-Plane Processors June 7, 2011 The ISL6328 dual PWM controller delivers high efficiency and Features tight regulation from two synchronous buck DC/DC converters. Processor Core Voltage Via Integrated Multi-Phase Power The ISL6328 supports power control of AMD processors, which Conversion operate from a serial VID interface (SVI). The dual output ISL6328 features a multi-phase controller to support the Core Configuration Flexibility voltage (VDD) and a single phase controller to power the - 1 or 2-Phase Operation with Internal Drivers Northbridge (VDDNB). - 3 or 4-Phase Operation with External PWM Drivers A precision core voltage regulation system is provided by a PSI L Support one-to-four-phase PWM voltage regulator (VR) controller. The - Phase Shedding for Improved Efficiency at Light Load integration of two power MOSFET drivers adds flexibility in - Diode Emulation in PSI mode layout and reduces the number of external components in the multi-phase section. A single phase PWM controller with - Gate Voltage Optimization integrated driver provides a second precision voltage Precision Core Voltage Regulation regulation system for the Northbridge portion of the processor. - Differential Remote Voltage Sensing This monolithic, dual controller with an integrated driver - 0.6% System Accuracy Over-Temperature solution provides a cost and space saving power management Optimal Processor Core Voltage Transient Response solution. - Adaptive Phase Alignment (APA) For applications that benefit from load line programming to - Active Pulse Positioning Modulation reduce bulk output capacitors, the ISL6328 features temperature compensated output voltage droop. The multi-phase portion Fully Differential, Continuous DCR Current Sensing also includes advanced control loop features for optimal - Accurate Load Line Programming transient response to load application and removal. One of - Precision Channel Current Balancing these features is highly accurate, fully differential, continuous - Temperature Compensated DCR current sensing for load line programming and channel current balance. Dual edge modulation is another unique Serial VID interface Handles up to 3.4MHz Clock Rates feature, allowing for quicker initial response to high di/dt load Two Level Overcurrent Protection Allows for High Current transients. Throttling (I ) DD SPIKE The ISL6328 supports Power Savings Mode by dropping the Multi-tiered Overvoltage Protection number of phases when the PSI L bit is set. Selectable Switching Frequency up to 1MHz Simultaneous Digital Soft-Start of Both Outputs FN7621 Rev 1.00 Page 1 of 33 June 7, 2011ISL6328 Integrated Driver Block Diagram Channels 1 and 2 Gate Drive PVCC GVOT BOOTn UGATEn PWM 20k SHOOT- SOFT-START GATE THROUGH AND PHASEn CONTROL PROTECTION FAULT LOGIC LOGIC 10k LGATEn Northbridge Gate Drive PVCC BOOT NB UGATE NB PWM 20k SHOOT- SOFT-START GATE THROUGH AND PHASE NB CONTROL PROTECTION FAULT LOGIC LOGIC 10k LGATE NB FN7621 Rev 1.00 Page 2 of 33 June 7, 2011