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)