ISL6334D Datasheet PDF - Intersil Corporation
| Part Number | ISL6334D | |
| Description | 4-Phase PWM Controller | |
| Manufacturers | Intersil Corporation | |
| Logo |  |
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Data Sheet
VR11.1, 4-Phase PWM Controller with
Phase Dropping, Droop Disabled and
Load Current Monitoring Features
The ISL6334D controls voltage regulator by driving up to 4
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.
Microprocessor loads can generate load transients with
extremely fast edge rates and requires high efficiency at light
load. The ISL6334D 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 ISL6334D is designed to be completely compliant with
Intel VR11.1 specifications. It accurately reports the load
current via 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 with diode
emulation option to reduce magnetic core and switching
losses, 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.
The ISL6334D 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 ISL6334D
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.
October 29, 2008
ISL6334D
FN6802.0
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
- Bi-directional, 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 4-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)
1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2008. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
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ISL6334D
Typical Application - 4-Phase Couple Inductor VR with 2-Phase PSI# and No Droop
www.DataSheet4U.com
+5V
VTT
VR_RDY
VID7
VID6
VID5
VID4
VID3
VID2
VID1
VID0
PSI#
VR_FAN
VR_HOT
VIN
FB COMP VCC DAC
REF
VDIFF
VSEN
RGND
EN_VTT
ISEN1+
ISEN1-
PWM1
ISLIS6L3633344D
PWM3
ISEN3-
ISEN3+
ISEN2+
ISEN2-
PWM2
EN_PWR
+5V GND
IMON
PWM4
ISEN4-
ISEN4+
TCOMP
TM
+5V
OFS
FS
SS
NTC
5V 5V
NTC: NTHS0805N02N6801,
6.8kΩ, VISHAY
5
+12V
VCC
BOOT1
VIN
GND
UGATE1
PHASE1
LGATE1
ISL6614
DRIVER
PVCC
12V
BOOT2
VIN
PWM1
UGATE2
PHASE2
PWM2
LGATE2
PGND
+12V
VCC
BOOT1
VIN
GND
UGATE1
PHASE1
LGATE1
ISL6614
DRIVER
PVCC 12V
BOOT2
VIN
PWM1
UGATE2
PHASE2
PWM2
LGATE2
PGND
µP
LOAD
FN6802.0
October 29, 2008
Preview 5 Page |
Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for ISL6334D electronic component. |
| Information | Total 27 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ ISL6334D.PDF Datasheet ] | |
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