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)