ISL62881CHRTZ データシートの表示（PDF） - Intersil

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ISL62881CHRTZ

Single-Phase PWM Regulator for IMVP-6.5™ Mobile CPUs and GPUs

Intersil 

ISL62881C, ISL62881D

Table of Contents

Related Literature . . . . . . . . . . . . . . . . . . . . . . 1

Load Line Regulation . . . . . . . . . . . . . . . . . . . . 1

Pin Function Description . . . . . . . . . . . . . . . . . 2

Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . 4

Absolute Maximum Ratings . . . . . . . . . . . . . . . 6

Thermal Information . . . . . . . . . . . . . . . . . . . . 6

Recommended Operating Conditions . . . . . . . . 6

Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . 6

Gate Driver Timing Diagram. . . . . . . . . . . . . . . 9

Simplified Application Circuits . . . . . . . . . . . . . 9

Theory of Operation . . . . . . . . . . . . . . . . . . . . 12

Multiphase R3™ Modulator .............................. 12

Diode Emulation and Period Stretching.............. 13

Start-up Timing ............................................. 13

Voltage Regulation and Load Line

Implementation ........................................... 14

Differential Sensing ........................................ 16

CCM Switching Frequency ............................... 16

Modes of Operation ........................................16

Dynamic Operation......................................... 16

Protections .................................................... 17

Current Monitor ............................................. 17

Adaptive Body Diode Conduction

Time Reduction ............................................ 18

Overshoot Reduction Function.......................... 18

Key Component Selection . . . . . . . . . . . . . . . . 18

RBIAS ........................................................... 18

Inductor DCR Current-Sensing Network ............ 18

Resistor Current-Sensing Network .................. 20

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

Load Line Slope............................................. 21

Current Monitor............................................. 21

Compensator ................................................ 22

Optional Slew Rate Compensation Circuit

for 1-Tick VID Transition ............................... 24

Voltage Regulator Thermal Throttling ............... 24

Layout Guidelines . . . . . . . . . . . . . . . . . . . . . . 25

CPU Application Reference Design

Bill of Materials . . . . . . . . . . . . . . . . . . . . . . . 29

GPU Application Reference Design

Bill of Materials . . . . . . . . . . . . . . . . . . . . . . . 30

Typical Performance . . . . . . . . . . . . . . . . . . . . 32

Revision History . . . . . . . . . . . . . . . . . . . . . . . 35

Products. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Package Outline Drawing

L28.4x4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Package Outline Drawing

L32.5x5E . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

5

FN7596.0

March 8, 2010

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