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ISL62883C

Multiphase PWM Regulator for IMVP-6.5 Mobile CPUs and GPUs

Renesas Electronics 

DATASHEET

To request the full datasheet, please visit www.intersil.com/products/isl62883c

ISL62883C

Multiphase PWM Regulator for IMVP-6.5 Mobile CPUs and GPUs

FN7557

Rev.3.00

May 5, 2017

The ISL62883C is a multiphase PWM buck regulator for

microprocessor or graphics processor core power supply. The

multiphase buck converter uses interleaved phases 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 the Intersil 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 ISL62883C can be configured as a CPU or graphics Vcore

controller and is fully compliant with Intel IMVP-6.5

specifications. It responds to PSI# and DPRSLPVR signals by

adding or dropping PWM3 and Phase 2 respectively, adjusting

the overcurrent protection threshold accordingly, and entering

and 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

ISL62883C offers the FB2 function to optimize 1-Phase

performance.

Features

• Programmable 1, 2-, or 3-phase CPU or GPU mode of

operation

• Precision multiphase core voltage regulation

- 0.5% system accuracy over-temperature

- Enhanced load line accuracy

• Microprocessor voltage identification input

- 7-Bit VID input, 0V 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

• 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

• For a full list of related documents, visit our website

- ISL62883C product page

1.10

1.08

1.06

1.04

1.02

1.00

VIN = 8V

VIN = 12V

VIN = 19V

0.98

0.96

0.94

0.92 0

5 10 15 20 25 30 35 40 45 50 55 60 65

IOUT (A)

FIGURE 1. LOAD LINE REGULATION

FN7557 Rev.3.00

May 5, 2017

Page 1 of 2

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