ISL78211 Datasheet, PDF (4/35 Pages) Intersil Corporation – Automotive Single-Phase Core Regulator for IMVP-6™ CPUs

ISL78211
Table of Contents
Ordering Information ......................................................................................................................... 2
Pin Configuration ................................................................................................................................ 2
Functional Pin Descriptions ................................................................................................................ 3
Absolute Maximum Ratings ................................................................................................................ 5
Thermal Information .......................................................................................................................... 5
Recommended Operating Conditions .................................................................................................. 5
Electrical Specifications ...................................................................................................................... 5
Gate Driver Timing Diagram ............................................................................................................... 8
Function Block Diagram ...................................................................................................................... 9
Simplified Application Circuit for DCR Current Sensing ..................................................................... 10
Simplified Application Circuit for Resistive Current Sensing ............................................................. 11
Theory of Operation .......................................................................................................................... 12
Start-up Timing .............................................................................................................................. 12
Static Operation .............................................................................................................................. 12
High Efficiency Operation Mode ......................................................................................................... 15
Dynamic Operation .......................................................................................................................... 15
Protection ...................................................................................................................................... 16
Component Selection and Application ............................................................................................... 16
Soft-Start and Mode Change Slew Rates ............................................................................................. 16
Selecting Rbias ............................................................................................................................... 17
Start-up Operation - CLK_EN# and PGOOD ......................................................................................... 17
Static Mode of Operation - Processor Die Sensing ................................................................................ 17
Setting the Switching Frequency - FSET ............................................................................................. 18
Voltage Regulator Thermal Throttling ................................................................................................. 18
Static Mode of Operation - Static Droop Using DCR Sensing .................................................................. 20
Dynamic Mode of Operation – Droop Capacitor Design in DCR Sensing ................................................... 21
Dynamic Mode of Operation - Compensation Parameters ...................................................................... 22
Droop using Discrete Resistor Sensing - Static/Dynamic Mode of Operation ............................................. 22
Typical Performance .......................................................................................................................... 24
ISL78211EVAL1Z Evaluation Board Schematics ................................................................................ 29
Controller ....................................................................................................................................... 29
Power Stage ................................................................................................................................... 30
Socket ........................................................................................................................................... 31
Dynamic Load ................................................................................................................................. 32
Geyserville Transition Gen. ............................................................................................................... 33
Revision History ............................................................................................................................... 35
Products ........................................................................................................................................... 35
Package Outline Drawing ................................................................................................................. 36
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FN7578.0
March 8, 2010