Precision Multi-Phase Buck PWM Controller for Intel, Mobile Voltage Positioning IMVP-IV™ and IMVP-IV+™

The ISL6217A Multi-Phase Buck PWM controller IC, with integrated half bridge gate drivers, provides a precision voltage regulation system for advanced Pentium IV microprocessors in notebook computers. Two-phase operation eases the thermal management issues and load demand of Intel’s latest high performance processors. This control IC also features both input voltage feed-forward and average current mode control for excellent dynamic response, “Loss-less” current sensing using MOSFET rDS(ON) and user-selectable switching frequencies from 250kHz to 1MHz per phase.

FEATUREs
• Diode Emulation Functionality in deep and deeper sleep modes for improved light load efficiency
• IMVP-IV™ and IMVP-IV+™ Compliant CORE Regulator
• Single and/or Two-phase Power Conversion
• “Loss-less” Current sensing for improved efficiency and reduced board area
- Optional Discrete Precision Current Sense Resistor
• Internal Gate-Drive and Boot-Strap Diodes
• Precision CORE Voltage Regulation
- 0.8% system accuracy over temperature
• 6-Bit Microprocessor Voltage Identification Input
• Programmable “Droop” and CORE Voltage Slew Rate to comply with IMVP-IV™ and IMVP-IV+™ specification
• Direct Interface with System Logic (STP_CPU# and DPRSLPVR) for Deep and Deeper Sleep modes of operation
• Easily Programmable voltage setpoints for Initial “Boot” Deep Sleep and Deeper Sleep Modes
• Excellent Dynamic Response
- Combined Voltage Feed-Forward and Average Current Mode Control
• Overvoltage, Undervoltage and Overcurrent Protection
• Power-Good Output with internal blanking during VID and mode changes
• User programmable Switching Frequency of 250kHz - 1MHz per phase
• Pb-Free Plus Anneal Available (RoHS Compliant)