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

The ISL6218 Single-Phase Buck PWM control IC, with integrated half bridge gate driver, provides a precision voltage regulation system for advanced Pentium-M microprocessors in notebook computers. 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 500kHz per phase.

FEATUREs
• IMVP-IV™ Compliant CORE Regulator
• Single-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 Diode
• 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™ Specification
• Discontinuous Mode Of Operation for Increased Light Load Efficiency in Deep and Deeper Sleep Mode
• 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 to 500kHz
• Pb-Free Plus Anneal Available (RoHS Compliant)