ISL6265C_10 Datasheet, PDF(9/27 Page) Intersil Corporation – Multi-Output Controller with Integrated MOSFET Drivers for AMD SVI Capable Mobile CPUs

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ISL6265C_10 Datasheet, PDF (9/27 Pages) Intersil Corporation – Multi-Output Controller with Integrated MOSFET Drivers for AMD SVI Capable Mobile CPUs

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ISL6265C

Table of Contents

Simplified System Diagram................................ 1

Functional Block Diagram .................................. 2

Ordering Information ....................................... 3

Pin Configuration............................................... 3

Pin Descriptions ................................................ 4

Simplified Application Circuit for Dual Plane and

Northbridge Support.......................................... 6

Simplified Application Circuit for Uniplane Core

and Northbridge Support ................................... 7

Simplified Application Circuit for Dual Layout ... 8

Absolute Maximum Ratings ............................ 10

Thermal Information ...................................... 10

Recommended Operating Conditions .............. 10

Electrical Specifications . ................................ 10

ISL6265C Gate Driver Timing Diagram ............ 13

Theory of Operation......................................... 13

Modulator ..................................................... 13

Initialization.................................................... 14

Power-On Reset ............................................. 14

Core Configuration ......................................... 14

Mode Selection .............................................. 14

Serial VID Interface......................................... 14

Pre-PWROK Metal VID..................................... 14

VFIX MODE ................................................... 15

SVI MODE ..................................................... 16

VID-On-the-Fly Transition ............................... 16

SVI WIRE Protocol.......................................... 16

SVI Bus Protocol ............................................ 17

Operation ........................................................ 18

Switching Frequency ...................................... 18

Current Sense ............................................... 18

Selecting RBIAS For Core Outputs.................... 19

Offset Resistor Selection................................. 19

Internal Driver Operation................................ 20

MOSFET Gate-Drive Outputs ........................... 20

Diode Emulation ............................................ 20

Power-Savings Mode ....................................... 20

Northbridge And Dual Plane Core ..................... 20

Uniplane Core ............................................... 20

Fault Monitoring and Protection ...................... 21

Power-Good Signal ........................................ 21

Overcurrent Protection ................................... 21

Overvoltage Protection ................................... 22

Undervoltage Protection ................................. 22

General Application Design Guide ................... 22

Selecting the LC Output Filter.......................... 22

Selection of the Input Capacitor....................... 23

MOSFET Selection and Considerations .............. 23

Selecting The Bootstrap Capacitor.................... 24

PCB Layout Considerations.............................. 24

Power and Signal Layers Placement on the PCB . 24

Component Placement ................................... 24

Signal Ground and Power Ground .................... 25

Routing and Connection Details ....................... 25

Copper Size for the Phase Node....................... 25

Revision History .............................................. 26

Products.......................................................... 26

Package Outline Drawing ............................... 27

FN6976.1

July 28, 2010

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