ISL6364 Datasheet PDF - Intersil Corporation


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ISL6364
Intersil Corporation

Part Number ISL6364
Description Dual 4-Phase + 1-Phase PWM Controller
Page 30 Pages

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Dual 4-Phase + 1-Phase PWM Controller for VR12/IMVP7
Applications
ISL6364
The ISL6364 is a dual PWM controller; its 4-phase PWMs control
the microprocessor core or the memory voltage regulator, while
its single-phase PWM controls the peripheral voltage regulator
for graphics, system agent, or processor I/O.
The ISL6364 utilizes Intersil’s proprietary Enhanced Active Pulse
Positioning (EAPP) modulation scheme to achieve the extremely
fast transient response with fewer output capacitors.
The ISL6364 is designed to be compliant to Intel VR12/IMVP7
specifications. It 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 (PSI2,3), it can further drop the number of phases
and then enable the diode emulation of the operationalphase.
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.
Today’s microprocessors require a tightly regulated output voltage
position versus load current (droop). The ISL6364 senses the
output current continuously by measuring thevoltage acrossthe
dedicated current sense resistor or the DCRof the output
inductor. The sensed current flows outof the FB pinto develop the
precision voltage drop across the feedback resistor for droop
control. Currentsensing circuitsalso provide the needed signals
for channel-currentbalancing, average overcurrent protection and
individual phase current limiting. TheTM and TMS pins are to
sense anNTC thermistor’s temperature, which is internally
digitizedfor thermal monitoring and for integrated thermal
compensation of the current sense elements of therespective
regulator.
The ISL6364 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 ISL6364 with other voltage rails.
Features
• Intel VR12/IMVP7 Compliant
- SerialVID with Programmable IMAX, TMAX, BOOT,
ADDRESS OFFSET Registers
• Intersil’s Proprietary Enhanced Active Pulse Positioning
(EAPP) Modulation Scheme, Patented
- Voltage Feed-forward and Ramp Adjustable Options
- High Frequency and PSI Compensation Options
- 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
•D ual Outputs
- Output 1 (VR0): 1 to 4-Phase, Coupled Inductor
Compatibility, for Core or Memory
- Output 2 (VR1): Single Phase for Graphics, System Agent,
or Processor I/O
- Differential Remote Voltage Sensing
- ±0.5% Closed-loop System Accuracy Over Load, Line and
Temperature
- Phase Doubler Compatibility (NOT Phase Dropping)
• Proprietary Active Phase Adding and Dropping with Diode
Emulation Scheme For Enhanced Light Load Efficiency
•P rogrammable Slew Rate of Fast Dynamic VID for VR0
• Dynamic VID Compensation (DVS) for VR1 at No Droop
• Droop and Diode Emulation Options
• Programmable 1 or 2-Phase Operation in PSI1/2/3 Mode
• Programmable Standard or Coupled-Inductor Operation
• Precision Resistor or DCR Differential Current Sensing
- Integrated Programmable Current Sense Resistors
- Integrated Thermal Compensation
- Accurate Load-Line (Droop) Programming
- Accurate Channel-Current Balancing
- Accurate Current Monitoring
• Average Overcurrent Protection and Channel Current Limit
With Internal Current Comparators
• Precision Overcurrent Protection on IMON & IMONS Pins
• Independent Oscillators, up to 1MHz Per Phase, for Cost,
Efficiency, and Performance Optimization
• Dual Thermal Monitoring and Thermal Compensation
• Start-up Into Pre-Charged Load
• Pb-Free (RoHS Compliant)
December 22 , 2010
FN6861.0
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 |Copyright Intersil Americas Inc. 2010. All Rights Reserved
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.
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ISL6364
Ordering Information
PART NUMBER
(Notes 1, 2, 3)
PART
MARKING
TEMP. RANGE
(°C)
PACKAGE
(Pb-Free)
PKG.
DWG. #
ISL6364CRZ
ISL6364 CRZ
0 to +70
48 Ld 6x6 QFN
L48.6x6B
ISL6364IRZ
ISL6364 IRZ
-40 to +85
48 Ld 6x6 QFN
L48.6x6B
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 ISL6364. For more information on MSL please see techbrief TB363.
Pin Configuration
ISL6364
(48 LD 6X6 QFN)
TOP VIEW
48 47 46 45 44 43 42 41 40 39 38 37
EN_PWR 1
RAMP_ADJ 2
RGND 3
VSEN 4
HFCOMP 5
PSICOMP 6
FB 7
COMP 8
IMON 9
SVDATA 10
SVALERT# 11
GND
36 PWM2
35 VCC
34 FS_DRP
33 RSET
32 SICI
31 TM
30 BTS_DES_TCOMPS
29 BT_FDVID_TCOMP
28 NPSI_DE_IMAX
27 ADDR_IMAXS_TMAX
26 PWMS
SVCLK 12
25 ISENS-
13 14 15 16 17 18 19 20 21 22 23 24
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December 22, 2010



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ISL6364
Controller and Driver Recommendation
DRIVER
QUIESCENT
CURRENT (mA)
GATE
DRIVE
VOLTAGE
# OF DIODE EMULATION
DRIVERS
(DE)
GATE DRIVE
DROP
(GVOT)
COMMENTS
ISL6627
1.0
5V Single
Yes
No For PSI# channel and its coupled channel in
coupled inductor applications or all channels
ISL6620
ISL6620A
1.2
5V Single
Yes
No For PSI# channel and its coupled channel in
coupled inductor applications or all channels.
Shorter body diode conduction time when enters
PSI2 mode at a fixed voltage.
ISL6596
0.19
5V Single
No
No For dropped phases or all channels without DE
ISL6610
ISL6610A
0.24
5V Dual
No
No For dropped phases or all channels without DE
ISL6611A
1.25
5V Dual
No
No Phase Doubler with Integrated Drivers, up to 12-
Phase. For all channels with DE Disabled
ISL6617
5.0 N/A N/A
No
No PWM Doubler for DrMOS, up to 12 or 24-Phase.
For all channels with DE Disabled
ISL6625
1.2
12V Single
Yes
Yes For PSI# channel and its coupled channel in
coupled inductor applications or all channels
ISL6622
5.5
12V Single
Yes
Yes For PSI# channel and its coupled channel in
coupled inductor applications or all channels.
Shorter body diode conduction time when enters
PSI2 mode at a fixed voltage.
ISL6622A
ISL6622B
5.5
12V Single
Yes
No For PSI# channel and its coupled channel in
coupled inductor applications or all channels.
Shorter body diode conduction time when enters
PSI2 mode at a fixed voltage.
ISL6625A
1.0 12V Single No
No For dropped phases or all channels without DE
NOTE: Intersil 5V and 12V drivers are mostly pin-to-pin compatible and allow for dual footprint layout implementation to optimize MOSFET selection and
efficiency. 5V Drivers are more suitable for high frequency and high efficiency applications.
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December 22, 2010



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ISL6364
ISL6364 Internal Block Diagram
FSS_DRPS
VR_RDYS
PWMS
TMS
VSENS
HFCOMPS/DVCS
FBS
RGNDS
COMPS
VR_RDY
BTS_DES_TCOMPS
BT_FDVID_TCOMP
NPSI_DE_IMAX
ADDR_IMAXS_TMAX
SVCLK
SVALERT#
SVDATA
VSEN
RGND
FB
PSICOMP
HFCOMP
COMP
SICI
“SICI” FOR
ISL6364:
“IAUTO” FOR
ISL6364A
IMON
GND
VR_HOT#
TM
THERMAL
MONITOR
HIGH FREQUENCY
COMPENSATION
IDROOPS
++
THGS
+
OVP
-
+
-
175mV
+
E/A
-
VR1: CLOCK AND
RAMP GENERATOR
SOFT-START
AND
FAULT LOGIC
EAPP
MODULATOR
TCOMPS
THGS
TEMPERATURE
COMPENSATION
E/A
AVERAGE & PEAK
CURRENT LIMIT
- 1.11V
OCP
+
IDROOPS
1.15V
DAC &
OFFSET
TCOMPS
SVID BUS
INTERFACE
TMAX
VR1 REGs
VR0 REGs
VR0: CLOCK AND
RAMP GENERATOR
N
LATCH
POWER-ON
RESET (POR)
RESET
- 0.85V
+
- 0.85V
+
TCOMP
PSI#
SOFT-START
AND
FAULT LOGIC
DAC &
OFFSET
+
+
REF
+
-
175mV
+
E/A
-
EAPP
MODULATOR
EAPP
MODULATOR
PSI#
IDROOP
HIGH FREQUENCY
COMPENSATION
AUTO PHASE SHED
SHEDDING
+
1.11V OCP
-
EAPP
MODULATOR
EAPP
MODULATOR
CHANNEL
CURRENT
BALANCE
AND PEAK
CURRENT LIMIT
SHED
CHANNEL
DETECT
N
1.15V
I_TRIP
1
N
TMAX
TCOMP
THERMAL
MONITOR
THG
TEMPERATURE
COMPENSATION
GAIN ADJUST
Σ
TEMPERATURE
COMPENSATION
CHANNEL
CURRENT
SENSE
ISENS+
ISENS-
IMONS
FS_DRP
RAMP_ADJ
VCC
EN_VTT
EN_PWR_OVP
OVP FOR
ISL6364A
PWM1
PWM2
PWM3
PWM4
ISEN1+
ISEN1-
ISEN2+
ISEN2-
ISEN3+
ISEN3-
ISEN4+
ISEN4-
RSET
4 FN6861.0
December 22, 2010




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