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ISL6566A Fiches technique(PDF) 1 Page - Intersil Corporation

No de pièce ISL6566A
Description  Three-Phase Buck PWM Controller with Two Integrated MOSFET Drivers and One External Driver Signal
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Fabricant  INTERSIL [Intersil Corporation]
Site Internet  http://www.intersil.com/cda/home
Logo INTERSIL - Intersil Corporation

ISL6566A Fiches technique(HTML) 1 Page - Intersil Corporation

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1
®
FN9200.2
ISL6566A
Three-Phase Buck PWM Controller with
Two Integrated MOSFET Drivers and One
External Driver Signal
The ISL6566A three-phase PWM control IC provides a
precision voltage regulation system for advanced
microprocessors. The integration of power MOSFET drivers
into the controller IC marks a departure from the separate
PWM controller and driver configuration of previous multi-
phase product families. By reducing the number of external
parts, this integration is optimized for a cost and space
saving power management solution.
Outstanding features of this controller IC include programmable
VID codes compatible with Intel VRM9, VRM10, as well as
AMD Hammer microprocessors. A unity gain, differential
amplifier is provided for remote voltage sensing, compensating
for any potential difference between remote and local grounds.
The output voltage can also be positively or negatively offset
through the use of a single external resistor.
A unique feature of the ISL6566A is the combined use of
both DCR and rDS(ON) current sensing. Load line voltage
positioning (droop) and overcurrent protection are
accomplished through continuous inductor DCR current
sensing, while rDS(ON) current sensing is used for accurate
channel-current balance. Using both methods of current
sampling utilizes the best advantages of each technique.
Protection features of this controller IC include a set of
sophisticated overvoltage, undervoltage, and overcurrent
protection. Overvoltage results in the converter turning the
lower MOSFETs ON to clamp the rising output voltage and
protect the microprocessor. The overcurrent protection level is
set through a single external resistor. Furthermore, the
ISL6566A includes protection against an open circuit on the
remote sensing inputs. Combined, these features provide
advanced protection for the microprocessor and power system.
Features
• Integrated Multi-Phase Power Conversion
- 1 or 2-Phase Operation with Internal Drivers
- 3-Phase Operation with External PWM Driver Signal
• Precision Core Voltage Regulation
- Differential Remote Voltage Sensing
-
±0.5% System Accuracy Over Temperature
- Adjustable Reference-Voltage Offset
• Precision Channel Current Sharing
- Uses Loss-Less rDS(ON) Current Sampling
• Accurate Load Line Programming
- Uses Loss-Less Inductor DCR Current Sampling
• Variable Gate Drive Bias: 5V to 12V
• Microprocessor Voltage Identification Inputs
- Up to a 6-Bit DAC
- Selectable between Intel’s VRM9, VRM10, or AMD
Hammer DAC codes
- Dynamic VID-on-the-fly Technology
• Multi-tiered Overvoltage and Overcurrent Protection
• Digital Soft-Start
• Selectable Operation Frequency up to 1.5MHz Per Phase
• Pb-Free Plus Anneal Available (RoHS Compliant)
Pinout
ISL6566A (QFN)
TOP VIEW
Ordering Information
PART NUMBER*
TEMP.
(°C)
PACKAGE
PKG.
DWG. #
ISL6566ACR
0 to 70 40 Ld 6x6 QFN
L40.6x6
ISL6566ACRZ (Note)
0 to 70 40 Ld 6x6 QFN (Pb-free) L40.6x6
ISL6566ACRZA (Note) 0 to 70 40 Ld 6x6 QFN (Pb-free) L40.6x6
ISL6566AIR
-40 to 85 40 Ld 6x6 QFN
L40.6x6
ISL6566AIRZ (Note)
-40 to 85 40 Ld 6x6 QFN (Pb-free) L40.6x6
ISL6566AIRZA (Note) -40 to 85 40 Ld 6x6 QFN (Pb-free) L40.6x6
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
*Add “-T” suffix for tape and reel.
VID1
VID0
VID12.5
VRM10
REF
OFS
VCC
COMP
FB
VDIFF
1
40
2
3
4
5
6
7
8
9
10
30
29
28
27
26
25
24
23
22
21
39
38
37
36
35
34
33
32
31
11
12
13
14
15
16
17
18
19
20
BOOT1
PHASE1
NC
PWM3
NC
ISEN3
EN_PH3
NC
PHASE2
BOOT2
41
GND
Data Sheet
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or1-888-468-3774
| Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2005. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
July 27, 2005


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