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PDF ISL62882 Data sheet ( Hoja de datos )
| Número de pieza | ISL62882 | |
| Descripción | Multiphase PWM Regulator | |
| Fabricantes | Intersil Corporation | |
| Logotipo |  |
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Multiphase PWM Regulator for IMVP-6.5™ Mobile CPUs
and GPUs
ISL62882, ISL62882B
The ISL62882 is a multiphase PWM buck regulator for
miroprocessor or graphics processor core power supply. The
multiphase buck converter uses interleaved phases to reduce the
total output voltage ripple with each phase carrying a portion of the
total load current, providing better system performance, superior
thermal management, lower component cost, reduced power
dissipation, and smaller implementation area. The ISL62882 uses
two integrated gate drivers to provide a complete solution. The PWM
modulator is based on Intersil's Robust Ripple Regulator (R3)
technology™. Compared with traditional modulators, the R3™
modulator commands variable switching frequency during load
transients, achieving faster transient response. With the same
modulator, the switching frequency is reduced at light load,
increasing the regulator efficiency.
The ISL62882 can be configured as CPU or graphics Vcore controller
and is fully compliant with IMVP-6.5™ specifications. It responds to
PSI# and DPRSLPVR signals by adding or dropping Phase 2,
adjusting overcurrent protection threshold accordingly, and
entering/exiting diode emulation mode. It reports the regulator
output current through the IMON pin. It senses the current by using
either discrete resistor or inductor DCR whose variation over
temperature can be thermally compensated by a single NTC
thermistor. It uses differential remote voltage sensing to accurately
regulate the processor die voltage. The unique split LGATE function
further increases light load efficiency. The adaptive body diode
conduction time reduction function minimizes the body diode
conduction loss in diode emulation mode. User-selectable overshoot
reduction function offers an option to aggressively reduce the output
capacitors as well as the option to disable it for users concerned
about increased system thermal stress. The ISL62882 offers the
FB2 function to optimize 1-phase performance.
The ISL62882B has the same functions as the ISL62882, but
comes in a different package.
Features
• Programmable 1- or 2-Phase CPU Mode Operation or 1-Phase
GPU Mode Operation
• Precision Multiphase Core Voltage Regulation
- 0.5% System Accuracy Over-Temperature
- Enhanced Load Line Accuracy
• Microprocessor Voltage Identification Input
- 7-Bit VID Input, 0V to 1.500V in 12.5mV Steps
- Supports VID Changes On-The-Fly
• Supports Multiple Current Sensing Methods
- Lossless Inductor DCR Current Sensing
- Precision Resistor Current Sensing
• Supports PSI# and DPRSLPVR modes
• Superior Noise Immunity and Transient Response
• Current Monitor and Thermal Monitor
• Differential Remote Voltage Sensing
• High Efficiency Across Entire Load Range
• Programmable 1- or 2-Phase Operation
• Two Integrated Gate Drivers
• Excellent Dynamic Current Balance Between Phases
• Split LGATE1 Drivers Increases Light Load Efficiency
• FB2 Function Optimizes 1-Phase Mode Performance
• Adaptive Body Diode Conduction Time Reduction
• User-selectable Overshoot Reduction Function
• Small Footprint 40 Ld 5x5 or 48 Ld 6x6 TQFN Packages
• Pb-Free (RoHS Compliant)
Applications
• Notebook Core Voltage Regulator
• Notebook GPU Voltage Regulator
June 21, 2011
FN6890.4
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. 2009-2011. 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.
1 page  
Block Diagram
ISL62882, ISL62882B
VIN VSEN ISEN2
ISEN1 PGOOD CLK_EN#
VDD
VR_ON
PSI#
DPRSLPVR
RBIAS
VID0
VID1
VID2
VID3
VID4
VID5
VID6
RTN
FB
COMP
VW
FB2
IMON
ISUM+
ISUM-
MODE
CONTROL
DAC
AND
SOFT-
START
CURRENT
BALANCE
IBAL
PGOOD &
CLK_EN#
LOGIC
PROTECTION FLT
WOC OC
VIN
CLOCK
IBAL VIN VDAC
MODULATOR
VDAC
COMP
VW
COMP
6µA 54µA 1.20V
1.24V
DRIVER
SHOOT THROUGH
PROTECTION
DRIVER
Σ
E/A
IDROOP
IMON
CURRENT
SENSE
2.5X
DRIVER
IBAL VIN VDAC
MODULATOR
WOC
COMP
CURRENT
COMPARATORS
NUMBER OF
OC PHASES
60µA
GAIN
SELECT
Σ
SHOOT THROUGH
PROTECTION
DRIVER
DRIVER
ADJ. OCP
THRESHOLD
COMP
VR_TT#
NTC
BOOT2
UGATE2
PHASE2
LGATE2
VSSP2
BOOT1
UGATE1
PHASE1
VCCP
LGATE1A
VSSP1
LGATE1B
GND
5 FN6890.4
June 21, 2011
5 Page 
ISL62882, ISL62882B
V+5 V+5 Vin
Rbias
Rntc
oC
VDD VCCP VIN
RBIAS
NTC BOOT2
PGOOD
VR_TT#
CLK_EN#
VID<0:6>
PSI#
DPRSLPVR
VR_ON
Rdroop
PGOOD
UGATE2
VR_TT#
PHASE2
CLK_EN#
VIDs
PSI#
LGATE2
VSSP2
DPRSLPVR
ISEN2
VR_ON
VW
Rfset
BOOT1
ISL62882
UGATE1
PHASE1
LGATE1b
COMP
FB2
FB
LGATE1a
VSSP1
ISEN1
VSEN
ISUM+
VCCSENSE
VSSSENSE
Rimon
IMON
RTN
Ris
Cis
IMON
ISUM-
(Bottom Pad)
VSS
Rn
Cn oC
Ri
Vin
Rsum
L
FIGURE 3. TYPICAL GPU APPLICATION CIRCUIT USING DCR SENSING
Vo
V+5 V+5 Vin
Rbias
Rntc
oC
VDD VCCP VIN
RBIAS
NTC
BOOT2
IMVP6_PWRGD
VR_TT#
CLK_ENABLE
VID<0:6>#
PSI#
DPRSLPVR
VR_ON
Rdroop
PGOOD
UGATE2
VR_TT#
PHASE2
CLK_EN#
VIDs
PSI#
LGATE2
VSSP2
DPRSLPVR
ISEN2
VR_ON
VW
Rfset
BOOT1
ISL62882
UGATE1
PHASE1
LGATE1b
COMP
FB2
FB
LGATE1a
VSSP1
ISEN1
VSEN
ISUM+
VCCSENSE
VSSSENSE
Rimon
IMON
RTN
Ris
Cis
IMON
ISUM-
(Bottom Pad)
VSS
Cn
Ri
Vin
L
Rsen
Vo
Rsum2
FIGURE 4. TYPICAL GPU APPLICATION CIRCUIT USING RESISTOR SENSING
11
FN6890.4
June 21, 2011
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet ISL62882.PDF ] | |
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