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.

特性 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)