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®
Data Sheet
February 27, 2006
ISL6595
FN9192.0
Digital Multiphase Controller
The ISL6595 digital multiphase controller provides core
power for today’s high current microprocessors by driving up
to six synchronous-rectified buck-converter channels in
parallel. Interleaved timing of the channels results in a higher
ripple frequency, reducing input and output ripple. With up to
six phases, each capable of up to 2MHz operation, the
ISL6595 can be used to build DC/DC converters that provide
up to 200A with excellent efficiency, low ripple, and the
lowest component count.
The ISL6595 utilizes digital technology to implement all
control functions, providing the ultimate in flexibility and
stability. The ISL6595 incorporates an industry standard I2C
serial interface for control and monitoring. Through the serial
interface, the power supply designer can quickly optimize
designs and monitor parameters. The interface allows the
ISL6595 to provide digitized information for real time system
monitoring and control.
The ISL6595 provides superior loadline accuracy through
internal calibration that measures and corrects current sense
error sources upon startup. The ISL6595 has programmable
current sense temperature compensation that allows the
designer to tailor the response for best loadline accuracy
over temperature. Superior loadline accuracy reduces
component count and solution cost.
To further reduce component count the ISL6595
incorporates patented Active Transient Response (ATR)
technology, allowing the fastest response to transient events
for reduced output capacitance.
The flexibility of the ISL6595 allows the power supply
designer to implement a wide range of solutions. When used
with industry standard power train components, the ISL6595
provides the highest performance with lowest component
count and cost.
Ordering Information
PART
NUMBER
(Note)
PART TEMP PACKAGE
MARKING (°C)
(Pb-free)
PKG.
DWG #
ISL6595DRZ-T ISL6595DRZ 0 to 85 48 Ld 7x7 QFN L48.7x7P
Tape and Reel
NOTE: 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.
Features
• Multiphase power conversion
- 1- to 6-phase operation
• 100kHz to 2MHz switching frequency
• Supports Intel® VR10.x and VR11.0 VID codes
• Supports AMD® 5-bit and 6-bit VID codes
• Internal high precision voltage reference
- ±10mV voltage setpoint accuracy
• Precision digital current sense calibration
• Precise digital current balancing with programmable
offsets for thermal balancing
• Digitally programmable loadline and loop compensation
• Differential voltage sense
• Digital temperature sensor compensation
• Active Transient Response (ATR) enables meeting
transient requirements with reduced output capacitance
• I2C interface for monitoring, control and configuration
• Internal non-volatile memory (NVM) to store custom
configurations
• Extensive fault detection capability with two user
configurable output fault pins (FAULT1, FAULT2)
- Input undervoltage
- Output under/overvoltage
- High side short
- Per phase and total output current
- Multiple internal and external temperature limits
- NVM configuration
- Calibration range and time-out
• Configurable latched fault or autonomous recovery
shutdown
• Single +3.3V supply operation
• Pb-free plus anneal available (RoHS compliant)
48 Ld QFN plastic package
Applications
• Core power regulation for Intel® and AMD® micro-
processors
• Intelligent point-of-load (POL) power regulation
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | 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.

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Pinout
ISL6595
ISL6595 (QFN)
TOP VIEW
48 47 46 45 44 43 42 41 40 39 38 37
VID7 1
VID6 2
VID5 3
VID4 4
VID3 5
VID2 6
VID1 7
VID0 8
VID_SEL 9
LL1 10
OUTEN 11
VDD 12
EXPOSED PAD
GND
36 VDD
35 ISEN2+
34 ISEN2-
33 PWM3
32 ISEN3+
31 ISEN3-
30 PWM4
29 ISEN4+
28 ISEN4-
27 PWM6/ATRLBB
26 ISEN6+
25 ISEN6-
13 14 15 16 17 18 19 20 21 22 23 24
2 FN9192.0
February 27, 2006

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ISL6595
Functional Block Diagram (Differential I-Sense Inputs)
VSENP
VSENN
RESET_N
ISEN6+
ISEN6-
ISEN5+
ISEN5-
ISEN4+
ISEN4-
ISEN3+
ISEN3-
ISEN2+
ISEN2-
ISEN1+
ISEN1-
TEMP_SEN
V12_SEN
SCL
SDA
SADDR
OUTEN
VID7
VID6
VID5
VID4
VID3
VID2
VID1
VID0
VID_SEL
LL1
LL0
POR
Current
Sense
Temp
Sense
Window
Comparator
(OVP/UVP)
Voltage
ADC
Current
ADC
Channel
Current
Current
Balance
AVP
PID/PWM
Controller
PWM
Driver
I2C Internal Memory
Fault Handler
Deglitch
State Machine
Digital Calibration Controller
PWM6
PWM5
PWM4
PWM3
PWM2
PWM1
FAULT2
FAULT1
CAL_CUR_EN
CAL_CUR_SEN
VR_READY
FIGURE 1. BLOCK DIAGRAM FOR DIFFERENTIAL I-SENSE, PWM-ONLY OUTPUT
3 FN9192.0
February 27, 2006

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Typical VRD Application
+12V
+5V
+3.3V
From
µP
To µP
Fault
Outputs
I2C I/F
VDD V12_SEN
ISL6595 GND
VID7 PWM1
VID6 ISEN1+
VID5 ISEN1-
VID4 PWM2
VID3 ISEN2+
VID2 ISEN2-
VID1 PWM3
VID0 ISEN3+
VID_SEL
ISEN3-
LL1 PWM4
LL0 ISEN4+
OUTEN
ISEN4-
PWM5
VR_READY
ISEN5+
ISEN5-
FAULT1
PWM6
FAULT2
ISEN6+
ISEN6-
SDA TEMP_SEN
SCL CAL_CUR_EN
SADDR CAL_CUR_SEN
VSENP
VSENN
ISL6595
`
ISL6594A
1 UGATE PHASE 8
2 BOOT PVCC 7
3 PWM
VCC 6
4 G4.N7DµF LGATE 5
`
ISL6594A
1 UGATE PHASE 8
2 BOOT PVCC 7
3 PWM
VCC 6
4 G4.N7DµF LGATE 5
`
ISL6594A
1 UGATE PHASE 8
2 BOOT PVCC 7
3 PWM
VCC 6
4 G4.N7DµF LGATE 5
`
ISL6594A
1 UGATE PHASE 8
2 BOOT PVCC 7
3 PWM
VCC 6
4 G4.N7DµF LGATE 5
RTHERM
FIGURE 2. 4-PHASE VRD DESIGN
Vout
RTN
4 FN9192.0
February 27, 2006

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ISL6595
Absolute Maximum Ratings
Supply Voltage, VDD . . . . . . . . . . . . . . . . . . . . . . . . -0.50V to 4.25V
All Pins Except ISENx, VSENP,
VSENN and Ground . . . . . . . . . . . . . . . . . . . . . . . -0.50V to 4.25V
All ISENx, VSENP, VSENN Pins . . . . . . . . . . . . . . . . -0.50V to 3.0V
All Ground Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.50V to 0.50V
ESD (Per JEDEC JES22-A114-B, JESD22-C101A, JESD22-A115-A)
Human Body Model (100pF, 1.5kΩ) . . . . . . . . . . . . . . . . . . 3,000V
Charged Device Model) . . . . . . . . . . . . . . . . . . . . . . . . . . . 1,000V
Vapor Phase (60s), TVAPOR . . . . . . . . . . . . . . . . . . . . . . . . . . 215°C
Infrared (15s), TIR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220°C
Recommended Operating Conditions
Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 85°C
Supply Voltage Range . . . . . . . . . . . . . . . . . . . . . . . +3.0V to +3.60V
Operating Case Temperature. . . . . . . . . . . . . . . . . . . . 0°C to 125°C
Operating Ambient Temperature . . . . . . . . . . . . . . . . . . 0°C to 85°C
Thermal Information
Thermal Resistance (Typical, Note 1)
θJA (°C/W) θJC (°C/W)
QFN Package. . . . . . . . . . . . . . . . . . . .
31
3
Maximum Junction Temperature (Plastic Package) . . 0°C to 150°C
Maximum Storage Temperature Range . . . . . . . . . . . -65°C to 150°C
Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . . 300°C
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the
device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTES:
1. θJA is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach” features. See
Tech Brief TB379.
2. For θJC, the “case temp” location is the center of the exposed metal pad on the package underside.
Electrical Specifications VDD = +3.3V, TC = +25°C, unless otherwise specified
PARAMETER
SYMBOL
TEST CONDITIONS
VDD SUPPLY
Nominal Supply Current
RESET_N
IVDD
Input LOW Voltage
Input HIGH Voltage
Input Current, Input Voltage LOW
VIN = 0.0V
Input Current, Input Voltage HIGH
VIN = 3.5V
VID[7:0], OUTEN, LL0, LL1, VID_SEL (Note 3)
Input Low Voltage
Input High Voltage (Note 4)
Input Current, Input Voltage Low
VIN = 0.0V
Input Current, Input Voltage High
VIN = 3.5V
OUTEN INPUT
Input Threshold
Input Hysteresis
Input Bandwidth
VT_VR_EN
VH_VR_EN
SDA, SCL INPUTS
Input LOW Voltage
Input HIGH Voltage
Input Current, Input Voltage Low
Input Current, Input Voltage High
Output LOW Voltage
VIL_S
VIH_S
IIL_S
IIH_S
VIN = 0.0V
VIN = 3.5V
MIN TYP MAX UNITS
- 100 140 mA
-0.3 - 0.5 V
2.8 - 3.6 V
-75 - -10 µA
- - - µA
-0.3 - 0.4 V
0.8 - 5.5 V
- -20 -30 µA
- 15 25 µA
0.8 0.85 0.9
V
- 100 - mV
- - 20 MHz
-0.3 - 0.8 V
2.4 - 5.5 V
-10 -
10 µA
-10 -
10 µA
- - 0.4 V
5 FN9192.0
February 27, 2006