ISL6376CRZ Datasheet ISL6376CRZ, ISL6376IRZ-T, ISL6376IRZ | P1-P2

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ISL6376

EAPP Hybrid Digital 6-Phase Green PWM Controller for Digital Power Management of Core and

Memory With AUTO Phase Shedding

TYPICAL DIAGRAMKEY FEATURES

• Intel VR12.5/VR12 compliant

• SerialVID with programmable IMAX, TMAX, BOOT, ADDRESS OFFSET registers

• VR12.5 core and VR12/VR12.5 memory

• Intersil’s proprietary

EAPP Hybrid Digital Enhanced Active Pulse Positioning (EAPP) Modulation

Scheme (Patented)

• SMBus/PMBus/I

C interface with SVID conflict free

• NVM and firmware free for low cost and easy use

• Auto phase shedding option for

greener environment

• Variable frequency control during load transients to reduce beat frequency oscillation

• Linear control with evenly distributed PWM pulses for better phase current balance during load

transients

• Voltage feed-forward and ramp adjustable options

• High frequency and PSI compensation options

• Proprietary active phase adding and dropping with diode emulation scheme for enhanced light

load efficiency

• 1 to 6-phase with phase doubler compatibility

• Differential remote voltage sensing

• ±0.5% closed-loop system accuracy over load, line and temperature

• Programmable 1 or 2-phase operation in PSI1 mode

• Programmable slew rate of fast dynamic VID with Dynamic VID Compensation (DVC)

• Droop and diode emulation options

• Precision resistor or DCR differential current sensing

• Integrated programmable current sense resistors

• Accurate load-line (droop) programming

• Accurate current monitoring and channel-current balancing

• True Catastrophic Failure Protection (CFP)

• Average overcurrent protection and channel current limit with internal current comparators

• Precision overcurrent protection on IMON pin

• Output voltage open sensing protection

• Protection disable option

• Accurate load-line (droop) programming

• Up to 2MHz per phase

• Thermal monitoring and integrated compensation

• Start-up into pre-charged load

• Pb-free (RoHS compliant)

DESCRIPTION

The ISL6376 is an

EAPP Hybrid Digital 6-Phase PWM controller and is designed to be compliant to Intel VR12.5/VR12 specifications and control the

microprocessor core or memory voltage regulator. It includes programmable functions and telemetries for easy use, high system flexibility and overclocking

applications using SMBus, PMBus, or I

C interface, which is designed to be conflict free with CPU’s SVID bus. This hybrid digital approach eliminates the

need of NVM and Firmware often seen in a full digital solution and significantly reduces design complexity, inventory and manufacturing costs.

ENLARGE +

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The ISL6376 utilizes Intersil’s proprietary Enhanced Active Pulse Positioning (EAPP) modulation scheme to achieve the extremely fast transient response

with fewer output capacitors. The ISL6376 accurately monitors the load current via the IMON pin and reports this information via the IOUT register to the

microprocessor, which sends a PSI# signal to the controller at low power mode via SVID bus. The controller enters 1- or

2-phase operation in low power mode (PSI1); in the ultra low power mode (PSI2,PSI3), it operates in single phase with diode emulation option. In low power

modes, the magnetic core and switching losses are significantly reduced, yielding high efficiency at light load. After the PSI# signal is de-asserted, the

dropped phase(s) are added back to sustain heavy load transient response and efficiency. In addition, the ISL6376 features auto-phase shedding to optimize

the efficiency from light to full load for

Green Environment without sacrificing the transient performance.

Today’s microprocessors require a tightly regulated output voltage position versus load current (droop). The ISL6376 senses the output current continuously

by measuring the voltage across a dedicated current sense resistor or the DCR of the output inductor. The sensed current flows out of the FB pin to develop

the precision voltage drop across the feedback resistor for droop control. Current sensing circuits also provide the needed signals for channel-current

balancing, average overcurrent protection and individual phase current limiting. The TM pin senses an NTC thermistor’s temperature, which is internally

digitized for thermal monitoring and for integrated thermal compensation of the current sense elements of the regulator.

The ISL6376 features remote voltage sensing and completely eliminates any potential difference between remote and local grounds. This improves

regulation and protection accuracy. The threshold-sensitive enable input is available to accurately coordinate the start-up of the ISL6376 with other voltage

rails.

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P1-P2

ISL6376CRZ

Mfr. #:

Buy ISL6376CRZ

Manufacturer:

Renesas / Intersil

Description:

Switching Controllers EAPP PWM Cntlr Digital Pwr Mngmnt

Lifecycle:

New from this manufacturer.

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ISL6376CRZ

ISL6376CRZ

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