ISL62883C Datasheet, PDF (6/43 Pages) Intersil Corporation – Multiphase PWM Regulator for IMVP-6.5™ Mobile CPUs and GPUs

ISL62883C
Table of Contents
Ordering Information ......................................................................................................................... 2
Pin Configuration ................................................................................................................................ 2
Functional Pin Descriptions ................................................................................................................ 3
Block Diagram .................................................................................................................................... 5
Table of Contents ............................................................................................................................... 6
Absolute Maximum Ratings ................................................................................................................ 7
Thermal Information .......................................................................................................................... 7
Recommended Operating Conditions .................................................................................................. 7
Electrical Specifications ...................................................................................................................... 7
Gate Driver Timing Diagram ............................................................................................................. 10
Simplified Application Circuits .......................................................................................................... 10
Theory of Operation .......................................................................................................................... 13
Diode Emulation and Period Stretching ............................................................................................... 14
Start-up Timing .............................................................................................................................. 15
Voltage Regulation and Load Line Implementation ............................................................................... 15
Differential Sensing ......................................................................................................................... 17
Phase Current Balancing .................................................................................................................. 18
Modes of Operation ......................................................................................................................... 20
Dynamic Operation .......................................................................................................................... 20
Protections ..................................................................................................................................... 21
FB2 Function .................................................................................................................................. 22
Adaptive Body Diode Conduction Time Reduction ................................................................................. 22
Overshoot Reduction Function ........................................................................................................... 22
Key Component Selection ................................................................................................................. 23
R_BIAS ............................................................................................................................................ 23
Inductor DCR Current-Sensing Network ............................................................................................. 23
Resistor Current-Sensing Network .................................................................................................... 25
Overcurrent Protection..................................................................................................................... 25
Current Monitor .............................................................................................................................. 26
Compensator .................................................................................................................................. 27
Optional Slew Rate Compensation Circuit For 1-Tick VID Transition ........................................................ 29
Voltage Regulator Thermal Throttling ................................................................................................. 30
Current Balancing ........................................................................................................................... 30
Layout Guidelines ............................................................................................................................. 30
1-PHASE GPU Application Reference Design Bill of Materials ............................................................ 34
2-PHASE CPU Application Reference Design Bill of Materials ............................................................ 35
Typical Performance ......................................................................................................................... 37
Products ........................................................................................................................................... 42
Package Outline Drawing ................................................................................................................. 43
6
FN7557.1
March 18, 2010