The ISL6336D controls voltage regulators by driving up to 6

interleaved synchronous-rectified buck channels in parallel.

This multiphase architecture results in multiplying channel

ripple frequency and reducing input and output ripple currents.

Lower ripple results in fewer components, lower cost, reduced

power dissipation, and smaller implementation area.

The ISL6336D utilizes Intersil’s proprietary Active Pulse

Positioning (APP), Adaptive Phase Alignment (APA)

modulation scheme, active phase adding and dropping to

achieve and maintain the extremely fast transient response

with fewer output capacitors and high efficiency from light to

full load.

The ISL6336D is designed to be completely compliant with

Intel VR11.1 specifications with exception of droop disabled. It

accurately reports the load current via the IMON pin to the

microprocessor, which sends an active low PSI# signal to the

controller at low power mode. The controller then enters 1- or

2-phase operation option to reduce magnetic core and

switching losses, yielding high efficiency at light load. After the

PSI# signal is deasserted, the dropped phase(s) are added

back to sustain heavy load transient response and efficiency.

The ISL6336D senses the output current continuously by

utilizing patented techniques to measure the voltage across

the dedicated current sense resistor or the DCR of the output

inductor. Current sensing circuits also provide the needed

signals for channel-current balancing, average overcurrent

protection and individual phase current limiting. An NTC

thermistor’s temperature is sensed via the TM pin and

internally digitized for thermal monitoring and for integrated

thermal compensation of the current sense elements.

A unity gain, differential amplifier is provided for 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 ISL6336D with any other voltage rail. Dynamic VID™

technology allows seamless on-the-fly VID changes. The offset

pin allows accurate voltage offset settings that are

independent of VID setting.

Features

• Intel VR11.1 compliant with droop disabled

• Proprietary active pulse positioning (APP) and adaptive

phase alignment (APA) modulation scheme

• Proprietary active phase adding and dropping for high light

load efficiency

• Precision multiphase core voltage regulation

- Differential remote voltage sensing

- 0.5 closed-loop system accuracy over load, line and

temperature

- Bidirectional, adjustable reference-voltage offset

• Precision resistor or DCR differential current sensing

- Accurate channel-current balancing

- Accurate load current monitoring via IMON pin

• Microprocessor voltage identification input

- Dynamic VID™ technology for VR11.1 requirement

- 8-bit VID, VR11 compatible

• Average overcurrent protection and channel current limit

• Precision overcurrent protection on IMON pin

• Thermal monitoring and overvoltage protection

• Integrated programmable temperature compensation

• Integrated open sense line protection

• 1- to 6-phase operation, coupled inductor compatibility

• Adjustable switching frequency up to 1MHz per phase

• Package option

- QFN compliant to JEDEC PUB95 MO-220 QFN - quad flat

no leads - product outline

• Pb-free (RoHS compliant)