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)