isl62883c Intersil Corporation, isl62883c Datasheet

isl62883c

Manufacturer Part Number

isl62883c

Description

Multiphase Pwm Regulator For Imvp-6.5? Mobile Cpus And Gpus

Manufacturer

Intersil Corporation

Datasheet

1.ISL62883C.pdf (43 pages)

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Multiphase PWM Regulator for IMVP-6.5™ Mobile

CPUs and GPUs

ISL62883C

The ISL62883C is a multiphase PWM buck regulator for

miroprocessor or graphics processor core power supply.

The multiphase buck converter uses interleaved phase to

reduce the total output voltage ripple with each phase

carrying a portion of the total load current, providing

better system performance, superior thermal

management, lower component cost, reduced power

dissipation, and smaller implementation area. The

ISL62883C uses two integrated gate drivers and an

external gate driver to provide a complete solution. The

PWM modulator is based on Intersil's Robust Ripple

Regulator (R

modulators, the R

switching frequency during load transients, achieving

faster transient response. With the same modulator, the

switching frequency is reduced at light load, increasing

the regulator efficiency.

The ISL62883C can be configured as CPU or graphics

Vcore controller and is fully compliant with IMVP-6.5™

specifications. It responds to PSI# and DPRSLPVR signals

by adding or dropping PWM3 and Phase 2 respectively,

adjusting overcurrent protection threshold accordingly,

and entering/exiting diode emulation mode. It reports

the regulator output current through the IMON pin. It

senses the current by using either discrete resistor or

inductor DCR whose variation over temperature can be

thermally compensated by a single NTC thermistor. It

uses differential remote voltage sensing to accurately

regulate the processor die voltage. The adaptive body

diode conduction time reduction function minimizes

the body diode conduction loss in diode emulation

mode. User-selectable overshoot reduction function

offers an option to aggressively reduce the output

capacitors as well as the option to disable it for users

concerned about increased system thermal stress. In

2-Phase configuration, the ISL62883C offers the FB2

function to optimize 1-Phase performance.

Load Line Regulation

March 18, 2010

FN7557.1

) technology™. Compared with traditional

™ modulator commands variable

1.10

1.08

1.06

1.04

1.02

1.00

0.98

0.96

0.94

0.92

1-888-INTERSIL or 1-888-468-3774

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

10 15 20 25 30 35 40 45 50 55 60 65

OUT

= 8V

Features

• Programmable 1, 2- or 3-Phase CPU or GPU Mode of

• Precision Multiphase Core Voltage Regulation

• Microprocessor Voltage Identification Input

• Supports Multiple Current Sensing Methods

• Supports PSI# and DPRSLPVR modes

• Superior Noise Immunity and Transient Response

• Current Monitor and Thermal Monitor

• Differential Remote Voltage Sensing

• High Efficiency Across Entire Load Range

• Two Integrated Gate Drivers

• Excellent Dynamic Current Balance

• FB2 Function Optimizes 1-Phase Mode Performance

• Adaptive Body Diode Conduction Time Reduction

• User-selectable Overshoot Reduction Function

• Small Footprint 40 Ld 5x5 TQFN Packages

• Pb-Free (RoHS Compliant)

Applications*

• Notebook Core Voltage Regulator

• Notebook GPU Voltage Regulator

Related Literature*

• See

(A)

Operation

- 0.5% System Accuracy Over-Temperature

- Enhanced Load Line Accuracy

- 7-Bit VID Input, 0V to 1.500V in 12.5mV Steps

- Supports VID Changes On-The-Fly

- Lossless Inductor DCR Current Sensing

- Precision Resistor Current Sensing

Board Application Note “ISL62883EVAL2Z User

Guide”

All other trademarks mentioned are the property of their respective owners.

Intersil (and design) is a registered trademark of Intersil Americas Inc.

AN1460

= 12V

= 19V

for ISL62883/ISL62883C Evaluation

(see page 42)

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