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Renesas Electronics Components Datasheet

ISL6334B Datasheet

4-Phase PWM Controller

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ISL6334B, ISL6334C
RECOMMOEIBSNSLDO6E3LD3E4RT, EEISPPLLR6A3OC3D4EUAMCETNT PART
VR11.1, 4-Phase PWM Controller with Light Load Efficiency Enhancement and
Load Current Monitoring Features
DATASHEET
FN6689
Rev 3.00
May 5, 2016
The ISL6334B, ISL6334C control 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 require high efficiency at light
load. The ISL6334B, ISL6334C 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 ISL6334B, ISL6334C is designed to be compliant to
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 ISL6334B,
ISL6334C 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. A 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 ISL6334B,
ISL6334C 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
• H_CPURST_N Input to Eliminate Required Extensive
External Circuitry for Proper PSI# Operation of Intel’s
Eaglelake Chipset Platforms
• Proprietary Active Pulse Positioning (APP) and Adaptive
Phase Alignment (APA) Modulation Scheme
• Proprietary Active Phase Adding and Dropping with Diode
Emulation Scheme For Enhanced 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)
FN6689 Rev 3.00
May 5, 2016
Page 1 of 31


Renesas Electronics Components Datasheet

ISL6334B Datasheet

4-Phase PWM Controller

No Preview Available !

ISL6334B, ISL6334C
Ordering Information
PART NUMBER
(Notes 1, 2, 3)
PART
MARKING
TEMP.
(°C)
PACKAGE
(Pb-Free)
PKG.
DWG. #
ISL6334BIRZ
6334B IRZ
-40 to +85
40 Ld 6x6 QFN
L40.6x6
ISL6334CIRZ
6334C IRZ
-40 to +85
40 Ld 6x6 QFN
L40.6x6
ISL6334BCRZ
6334B CRZ
0 to +70
40 Ld 6x6 QFN
L40.6x6
ISL6334CCRZ
6334C CRZ
0 to +70
40 Ld 6x6 QFN
L40.6x6
NOTES:
1. Add “-T” suffix for tape and reel. 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 ISL6334B, ISL6334C. For more information on MSL please see
techbrief TB363.
Pinout
ISL6334B, ISL6334C
(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
FN6689 Rev 3.00
May 5, 2016
Page 2 of 31


Part Number ISL6334B
Description 4-Phase PWM Controller
Maker Renesas
Total Page 30 Pages
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