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ISL6334AR5368 Datasheet

4-Phase PWM Controller

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DATASHEET
ISL6334AR5368
VR11.1, 4-Phase PWM Controller with Light Load Efficiency Enhancement and
Load Current Monitoring Features
FN6839
Rev 2.00
Sep 7, 2010
The ISL6334AR5368 controls microprocessor core voltage
regulation 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 ISL6334AR5368 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 ISL6334AR5368 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.
Today’s microprocessors require a tightly regulated output
voltage position versus load current (droop). The
ISL6334AR5368 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. The sensed current flows out of 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. An NTC
thermistor’s temperature is sensed via 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
ISL6334AR5368 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
• Proprietary Active Pulse Positioning (APP) and Adaptive
Phase Alignment (APA) Modulation Scheme
• Proprietary Active Phase Adding and Dropping with Diode
Emulation Scheme 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 Load-Line (Droop) Programming
- 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)
FN6839 Rev 2.00
Sep 7, 2010
Page 1 of 31


Renesas Electronics Components Datasheet

ISL6334AR5368 Datasheet

4-Phase PWM Controller

No Preview Available !

ISL6334AR5368
Ordering Information
PART NUMBER
(Notes 2, 3)
PART
MARKING
TEMP. RANGE
(°C)
PACKAGE
(Pb-Free)
PKG.
DWG. #
ISL6334AIRZR5368
6334A IRZ
-40 to +85
40 Ld 6x6 QFN
L40.6x6
ISL6334AIRZ-TR5368 (Note 1) 6334A IRZ
-40 to +85
40 Ld 6x6 QFN
L40.6x6
ISL6334ACRZR5368
6334A CRZ
0 to +70
40 Ld 6x6 QFN
L40.6x6
ISL6334ACRZ-TR5368 (Note 1) 6334A CRZ
0 to +70
40 Ld 6x6 QFN
L40.6x6
NOTES:
1. Please refer to TB347 for details on reel specifications.
2. These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte
tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations). Intersil
Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-
020.
3. For Moisture Sensitivity Level (MSL), please see device information page for ISL6334AR5368. For more information on MSL please see techbrief
TB363.
Pinout
ISL6334AR5368
(40 LD QFN)
TOP VIEW
40 39 38 37 36 35 34 33 32 31
VID6 1
VID5 2
VID4 3
VID3 4
VID2 5
VID1 6
VID0 7
PSI# 8
OFS 9
IMON 10
GND
30 ISEN3-
29 ISEN3+
28 ISEN1+
27 ISEN1-
26 PWM1
25 PWM4
24 ISEN4-
23 ISEN4+
22 ISEN2+
21 ISEN2-
11 12 13 14 15 16 17 18 19 20
FN6839 Rev 2.00
Sep 7, 2010
Page 2 of 31


Part Number ISL6334AR5368
Description 4-Phase PWM Controller
Maker Renesas
Total Page 30 Pages
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