ISL62883 查看數據表（PDF） - Renesas Electronics

零件编号

产品描述 (功能)

生产厂家

ISL62883

Multiphase PWM Regulator for IMVP-6.5™ Mobile CPUs

Renesas Electronics 

DATASHEET

ISL62883, ISL62883B

Multiphase PWM Regulator for IMVP-6.5™ Mobile CPUs

FN6891

Rev 4.00

June 21, 2011

The ISL62883 is a multiphase PWM buck regulator for

miroprocessor 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 ISL62883 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 (R3) technology™. Compared with

traditional modulators, the R3™ modulator commands variable

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 ISL62883 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 a 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 ISL62883 offers the FB2 function to

optimize 1-Phase performance.

The ISL62883B has the same functions as the ISL62883, but

comes in a different package.

Features

• Precision Multiphase Core Voltage Regulation

- 0.5% System Accuracy Over-Temperature

- Enhanced Load Line Accuracy

• Microprocessor Voltage Identification Input

- 7-Bit VID Input, 0.300V to 1.500V in 12.5mV Steps

- Supports VID Changes On-The-Fly

• Supports Multiple Current Sensing Methods

- Lossless Inductor DCR Current Sensing

- Precision Resistor Current Sensing

• 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

• Programmable 1-, 2- or 3-Phase Operation

• Two Integrated Gate Drivers

• Excellent Dynamic Current Balance Between Phases

• FB2 Function in 2-Phase Configuration to Optimize 1-Phase

Performance

• Adaptive Body Diode Conduction Time Reduction

• User-selectable Overshoot Reduction Function

• Small Footprint 40 Ld 5x5 or 48 Ld 6x6 TQFN Package

• Pb-Free (RoHS Compliant)

Applications

• Notebook Computers

FN6891 Rev 4.00

June 21, 2011

Page 1 of 37

Share Link: