ISL8101IRZ-T Intersil, ISL8101IRZ-T Datasheet

IC PWM CTRLR BUCK 2PHASE 24-QFN

ISL8101IRZ-T

Manufacturer Part Number
ISL8101IRZ-T
Description
IC PWM CTRLR BUCK 2PHASE 24-QFN
Manufacturer
Intersil
Datasheet

Specifications of ISL8101IRZ-T

Applications
Controller, Intel VRM9, VRM10, and AMD Hammer Applications
Voltage - Input
4.6 ~ 12 V
Number Of Outputs
1
Voltage - Output
0.6 ~ 2.3 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
24-VQFN Exposed Pad, 24-HVQFN, 24-SQFN, 24-DHVQFN
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Two-Phase Multiphase Buck PWM
Controller with Integrated MOSFET Drivers
The ISL8101 two-phase PWM control IC provides a
precision voltage regulation system for advanced loads up to
60A to 80A. Multiphase power conversion is a marked
departure from single phase converter configurations
employed to satisfy the increasing current demands of
modern microprocessors and other electronic circuits. By
distributing the power and load current, implementation of
multiphase converters utilize smaller and lower cost
transistors with fewer input and output capacitors. These
reductions accrue from the higher effective conversion
frequency with higher frequency ripple current due to the
phase interleaving process of this topology.
Outstanding features of this controller IC include programmable
VID codes compatible with Intel VRM9, VRM10, as well as
AMD’s Hammer microprocessors, along with a system
regulation accuracy of ±1%. The ISL8101, though, does not
intrinsically allow for load-line regulation (no droop).
Important features of this controller IC include a set of
sophisticated overvoltage and overcurrent protection.
Overvoltage results in the converter turning the lower
MOSFETs ON to clamp the rising output voltage and protect
the microprocessor. Like other Intersil multiphase
controllers, the ISL8101 uses cost and space-saving
r
overcurrent protection. Channel current balancing is
automatic and accurate with the integrated current-balance
control system. Overcurrent protection can be tailored to any
application with no need for additional parts. These features
provide intelligent protection for modern power systems.
Ordering Information
ISL8101CRZ*
(Note)
ISL8101IRZ*
(Note)
ISL8101EVAL1 Evaluation Platform
*Add “-T” suffix for tape and reel.
specifications.
NOTE:
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.
DS(ON)
NUMBER
(Note)
PART
These Intersil Pb-free plastic packaged products employ special
sensing for channel current balance and
81 01CRZ
81 01IRZ
MARKING
PART
®
Please refer to TB347 for details on reel
-40 to +85 24 Ld 4x4 QFN
1
0 to +70
TEMP.
(°C)
Data Sheet
24 Ld 4x4 QFN
(Pb-Free)
(Pb-Free)
PACKAGE
1-888-INTERSIL or 1-888-468-3774
L24.4x4B
L24.4x4B
DWG. #
PKG.
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
Features
• Integrated Two-Phase Power Conversion
• 5V to 12V Input Voltage Conversion
• Precision Channel Current Sharing
• Precision Output Voltage Regulation
• Microprocessor Voltage Identification Inputs
• Fast Transient Recovery Time
• Overcurrent Protection
• Pre-Biased Output Start-Up Operation
• Sources and Sinks Output Current
• Improved, Multi-tiered Overvoltage Protection
• QFN Package:
• Pb-free (RoHS compliant)
Pinout
- Loss-Less Current Sampling - Uses r
- ±1% System Accuracy Over-Temperature (Commercial)
- Up to a 6-Bit DAC
- Selectable between Intel’s VRM9, VRM10, or AMD’s
- Bus Termination Applications
- Compliant to JEDEC PUB95 MO-220
- Near Chip Scale Package Footprint, Which Improves
DACSEL/VID5
Hammer DAC codes
QFN - Quad Flat No Leads - Package Outline
PCB Efficiency and has aThinner Profile
All other trademarks mentioned are the property of their respective owners.
VRM10
COMP
July 28, 2008
|
VID1
VID0
Intersil (and design) is a registered trademark of Intersil Americas Inc.
FB
Copyright Intersil Americas Inc. 2006, 2008. All Rights Reserved
1
2
3
4
5
6
24
7
(24 LD QFN)
23
8
TOP VIEW
ISL8101
22
9
GND
25
10
21
11
20
DS(ON)
19
12
ISL8101
18
17
16
15
14
13
FN9223.1
PHASE1
LGATE1
PVCC
LGATE2
PGND
PHASE2

Related parts for ISL8101IRZ-T

ISL8101IRZ-T Summary of contents

Page 1

... PART TEMP. (Note) MARKING (°C) ISL8101CRZ* 81 01CRZ 0 to +70 (Note) ISL8101IRZ* 81 01IRZ - 4x4 QFN (Note) ISL8101EVAL1 Evaluation Platform Please refer to TB347 for details on reel *Add “-T” suffix for tape and reel. specifications. These Intersil Pb-free plastic packaged products employ special ...

Page 2

Block Diagram OVP WHILE DISABLED 1.65V/1.95V + - OVP + 200mV - COMP VID0 VID1 VID2 TTL D/A CONVERTER VID3 (VID DAC) EA VID4 DACSEL/VID5 + VRM10 - FB OFFSET SOURCE GND OFS SSEND ENLL VCC POWER-ON RESET (POR) OSCILLATOR ...

Page 3

Simplified Power System Diagram +5V IN 5-6 VID Typical Application +12V IN + DACSEL/VID12 VID4 VID3 VID2 VID1 VID0 VRM10 R ISEN ISEN SSEND R’ OFS ISL8101 ENLL OFS R OFS COMP ...

Page 4

... V + 0.3V Maximum Storage Temperature Range . . . . . . . . . .-65°C to +150°C BOOT - 0. 0.3V Pb-Free Reflow Profile .see link below GND CC + 0.3V http://www.intersil.com/pbfree/Pb-FreeReflow.asp 0°C to +85°C, Unless Otherwise Specified. Parameters with MIN and/or MAX CC J TEST CONDITIONS I ; ENLL = high VCC VCC Rising ...

Page 5

Electrical Specifications Test Conditions: V limits are 100% tested at +25°C, unless otherwise specified. Temperature limits established by characterization and are not production tested. (Continued) PARAMETER OVERCURRENT PROTECTION Overcurrent Trip Level PROTECTION Overvoltage Threshold while IC Disabled Overvoltage Threshold Overvoltage ...

Page 6

GND pin. LGATE drive is referenced to the PGND pin. VID0-4 (Pins 2, 1, 24-22) Voltage identification inputs from microprocessor. These pins respond to TTL logic thresholds. The ISL8101 decodes the VID inputs to establish the output ...

Page 7

Operation The ISL8101 employs simple voltage-mode control. Figure 1 shows a simplified diagram of the voltage regulation and current balance loops. Voltage feedback is used to precisely regulate the output voltage, while current feedback tightly controls the individual channel currents, ...

Page 8

INTERLEAVING The switching of each channel in a ISL8101-based converter is timed to be symmetrically out of phase with the other channel result, the two-phase converter has a combined ripple frequency twice the frequency of one of its ...

Page 9

... In order to fully realize the thermal advantage important that each channel in a multiphase converter be controlled to deliver about the same current at any load level. Intersil multiphase controllers ensure current balance by comparing each channel’s current to the average current delivered by all channels and making appropriate adjustments to each channel’ ...

Page 10

TABLE 1. AMD HAMMER VOLTAGE IDENTIFICATION CODES (Continued) VID4 VID3 VID2 VID1 ...

Page 11

TABLE 3. VRM10 VOLTAGE IDENTIFICATION CODES (Continued) VID4 VID3 VID2 VID1 VID0 ...

Page 12

OVERVOLTAGE PROTECTION The ISL8101 benefits from a multi-tiered approach to overvoltage protection. A pre-POR mechanism is at work while the chip does not have sufficient bias voltage to initiate an active response situation. Thus, while VCC is ...

Page 13

DAC setting. Should the output be pre-charged to a level exceeding the DAC setting, the output drives are ...

Page 14

... C C ⎠ ⎠ many of the basic skills and techniques referenced below ⋅ ⋅ = 2π addition to this guide, Intersil provides complete reference designs that include schematics, bills of materials, and example board layouts for all common microprocessor applications. 1 ⋅ MOSFETs 1 2 ⋅ -------------------- - (EQ ...

Page 15

MOSFET can be found in Equation 15. ⎛ ⎞ P ⎜ OUT ⎟ ---------------------------------- = – ------------ - LMOS1 DS ON ⎝ ⎠ ...

Page 16

At the beginning of the load transient, the output capacitors supply all of the transient current. The output voltage will initially deviate by an amount approximated by the voltage drop across the ESL. As the load current increases, the voltage ...

Page 17

It is especially important to locate the components associated with the feedback circuit close to their respective controller pins, since they belong to a high- impedance circuit loop, sensitive to EMI pick-up important to ...

Page 18

Component Selection Guidelines Output Capacitor Selection The output capacitor is selected to meet both the dynamic load requirements and the voltage ripple requirements. The load transient a microprocessor impresses is characterized by high slew rate (di/dt) current demands. In general, ...

Page 19

... Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use ...

Page 20

Package Outline Drawing L24.4x4B 24 LEAD QUAD FLAT NO-LEAD PLASTIC PACKAGE Rev 2, 10/06 4.00 PIN 1 INDEX AREA (4X) 0.15 TOP VIEW ( TYP ) ( TYPICAL RECOMMENDED LAND PATTERN 20 ISL8101 ...

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