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Data Sheet
R
T
S
I
SE
NO
®
ISL6217
December 2006
FN9089.3
Precision Multi-Phase Buck PWM
Controller for Intel‚ Mobile Voltage
Positioning IMVP-IV and IMVP-IV+
™
™
The ISL6217 Multi-Phase Buck PWM control IC, with
integrated half bridge gate drivers, provides a precision
voltage regulation system for advanced Pentium“ IV
microprocessors in notebook computers. Two-phase
operation eases the thermal management issues and load
demand of Intel’s latest high performance processors. This
control IC also features both input voltage feed-forward and
average current mode control for excellent dynamic
response, “Loss-less” current sensing using MOSFET
RDS(ON) and user selectable switching frequencies from
250kHz to 1MHz per phase.
The ISL6217 includes a 6-bit digital-to-analog converter
(DAC) that dynamically adjusts the CORE PWM output
voltage from 0.700V to 1.708V in 16mV steps and conforms
to the Intel IMVP-IV™ and IMVP-IV+™ mobile VID
specification. The ISL6217 also has logic inputs to select
Active, Deep Sleep and Deeper Sleep modes of operation.
A precision reference, remote sensing and proprietary
architecture, with integrated processor-mode compensated
“Droop”, provide excellent static and dynamic CORE voltage
regulation.
To improve efficiency at light loading, the ISL6217 can be
configured to run in single phase PWM in ACTIVE, DEEP or
DEEPER SLEEP modes of operation.
Another feature of this IC controller is the PGOOD monitor
circuit that is held low until CORE voltage increases, during
its soft-start sequence, to within 12% of the “Boot” voltage.
This PGOOD signal is masked during VID changes. Output
Overcurrent, Overvoltage and Undervoltage are monitored
and result in the converter latching off and PGOOD signal
being held low.
The Overvoltage and Undervoltage thresholds are 112%
and 84% of the VID, Deep or Deeper Sleep setpoint,
respectively. Overcurrent protection features a 32 cycle
Overcurrent shutdown. PGOOD, Overvoltage, Undervoltage
and Overcurrent provide monitoring and protection for the
microprocessor and power system. The ISL6217 IC is
available in a 38 lead TSSOP.
Features
•
IMVP-IV™ and IMVP-IV+™ Compliant CORE Regulator
•
Single and/or Two-phase Power Conversion
•
“Loss-less” Current sensing for improved efficiency and
reduced board area
−
Optional Discrete Precision Current Sense Resistor
•
Internal Gate-Drive and Boot-Strap Diodes
•
Precision CORE Voltage Regulation
−
0.8% system accuracy over temperature
•
6-Bit Microprocessor Voltage Identification Input
•
Programmable “Droop” and CORE Voltage Slew Rate to
comply with IMVP-IV™ and IMVP-IV+™ specification
•
Direct Interface with System Logic (STP_CPU# and
DPRSLPVR) for Deep and Deeper Sleep modes of
operation
•
Easily Programmable voltage setpoints for Initial “Boot”,
Deep Sleep and Deeper Sleep Modes
•
Excellent Dynamic Response
−
Combined Voltage Feed-Forward and Average
Current Mode Control
•
Overvoltage, Undervoltage and Overcurrent Protection
•
Power-Good Output with internal blanking during VID and
mode changes
•
User programmable Switching Frequency of 250kHz -
1MHz per phase
•
Pb-Free Plus Anneal Available (RoHS Compliant)
Ordering Information
PART NUMBER
ISL6217CV
ISL6217CV-T
ISL6217CVZ
(Note 1)
ISL6217CVZ-T
(Note 1)
ISL6217CVZA
(Note 1)
ISL6217CVZA-T
(Note 1)
NOTES:
1. Intersil Pb-free plus anneal products employ special Pb-free
material sets; molding compounds/die attach materials and 100%
matte tin plate termination finish, which are 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.
(Pb-free)
(Pb-free)
-10 to 85
38 Ld TSSOP
(Pb-free)
38 Ld TSSOP Tape and Reel
M38.173
M38.173
TEMP (°C)
-10 to 85
PACKAGE
38 Ld TSSOP
PKG.
DWG. #
M38.173
M38.173
M38.173
M38.173
38 Ld TSSOP Tape and Reel
-10 to 85
38 Ld TSSOP
(Pb-free)
38 Ld TSSOP Tape and Reel
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2006. All Rights Reserved
All other trademarks mentioned are the property of their respective owners
ISL6217
Typical Application - 2-Phase Converter
Figure 1 shows a 2-Phase Synchronous Buck Converter
circuit used to provide “CORE” voltage regulation for the
Intel Pentium“ IV mobile processor using IMVP-IV™ and
IMVP-IV+™ voltage positioning.
The ISL6217 PWM controller can be configured for two or
one channel operation, and the ISL6217 can change the
number of power channels in operation, dynamically. The
number of channels of operation can be changed through
the PWRCH pin. The ISL6217 can be configured for two
+5VDC
+5VDC
channel operation in “Active” mode and one channel
operation in “Deep” and “Deeper Sleep” modes through
logic connections to the PWRCH pin. The following
configuration uses two channel operation in “Active” mode
and one channel operation in “Deep” and “Deeper Sleep”
modes.
The circuit shows pin connections for the ISL6217 PWM
controller in the 38 lead TSSOP package.
Vbattery
VDD
DACOUT
DSV
FSET
PWRCH
VBAT
ISEN1
PHASE1
UG1
BOOT1
VSSP1
LG1
VR_ON
DPRSLPVR
STP_CPU#
EN
DRSEN
DSEN#
VID0
VID1
ISL6217
TSSOP
VDDP
LG2
VSSP2
BOOT2
UG2
PHASE2
ISEN2
VSEN
DRSV
STV
OCSET
VSS
VID
VID2
VID3
VID4
VID5
PWRGD
PGOOD
EA+
COMP
FB
SOFT
+Vcc_core
FIGURE 1.
TYPICAL APPLICATION CIRCUIT FOR ISL6217 MULTIPHASE PWM CONTROLLER
4
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