ISL6558EVAL2 Intersil, ISL6558EVAL2 Datasheet

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ISL6558EVAL2

Manufacturer Part Number
ISL6558EVAL2
Description
EVAL BOARD W/6605 DRVRS ISL6558
Manufacturer
Intersil
Series
Endura™r
Datasheets

Specifications of ISL6558EVAL2

Main Purpose
DC/DC, Step Down
Outputs And Type
1, Non-Isolated
Voltage - Output
1.35V
Current - Output
30A
Voltage - Input
4.5 ~ 5.5V
Regulator Topology
Buck
Frequency - Switching
500kHz
Board Type
Fully Populated
Utilized Ic / Part
HIP6609, ISL6558
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Power - Output
-
Introduction
The changing computer performance landscape has brought
about the need for flexible power solutions. Peripheral
performance continues to increase as higher speed bus
interfaces are made available. Router designs continue to
grow in complexity as on-board processors perform more
functions within a limited board space while continuing to
increase the speed of data transfer. This places higher
power density requirements on the DC/DC converters which
supply them.
Intersil’s Endura
ISL65xx) and synchronous-rectified buck MOSFET drivers
(HIP66xx and ISL66xx) are suitable for the interleaved
DC/DC buck converter implementation, as shown in
Figure 1, and provide superior performance solutions with
their space economical MLFP packages.
This application note first gives a brief introduction of
Intersil’s four-phase controller ISL6558 and synchronous-
rectified driver ISL6609. A summary of the ISL6558 and
ISL6609 based design follows. The experimental results for
a low-profile 5V-to-1.35V@30A, 500kHz, and 90% efficiency
converter in two-phase operation using the interleaved
approach and with their space economical MLFP package
ICs are discussed. The evaluation board can be pushed up
to 80A in four-phase operation, or modified for 12V input
applications by replacing the input capacitors with higher
voltage rating capacitors. Term Definitions, Reference,
Schematics, Bill of Materials, and Layout are included at the
end of this application note.
FIGURE 1. MULTI-PHASE INTERLEAVED BUCK CONVERTER
V
IN
Lin
Cin
multi-phase controllers (HIP63xx and
Q1
®
Q1
Q1
1
Application Note
Q2
Q2
Q2
500kHz, and 90% Efficiency DC/DC Converter
Lo
Lo
Lo
Endura™ is a trademark of Intersil Americas Inc.
ISL6558EVAL2 - Low-Profile, 5V/12V Input,
Co
Vo
1-888-INTERSIL or 1-888-468-3774
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
Intersil’s ISL6558 and ISL6609
The ISL6558 controller, coupled with ISL6609 single-
channel driver ICs, forms the basic building blocks for
applications which demand high current, rapid load transient
response, and high efficiency performance at high switching
frequency within a limited board area and height.
The ISL6558 regulates output voltage and balances load
currents for two to four synchronous-rectified buck converter
channels; its internal structure is shown in Figure 2. The
internal 0.8V reference allows output voltage selection down
to that level with a 1% system accuracy over temperature.
The current-channel balance loop provides good thermal
balance among all phases. Output voltage droop or active
voltage positioning is optional. Overvoltage and overcurrent
monitors and protection functions of the IC provide a safe
environment for the microprocessor or other load. The
controller is available in a 16-lead SOIC package and a
5x5mm
For more detailed descriptions of the ISL6558 functionality,
refer to the device datasheet [1].
The ISL6609 is a 5V driver IC capable of delivering up to 4A
of gate current for rapidly switching both MOSFETs in a
synchronous-rectified bridge; its internal structure is shown
in Figure 2. It is especially designed for voltage regulators
that require high efficiency performance at high switching
frequency within a limited board space. The ISL6609
accepts a single logic input to control both upper and lower
MOSFETs. Its Tri-State® feature, working together with
Intersil’s Multi-Phase PWM controllers, helps prevent a
negative transient on the output voltage when the output is
being shut down. This eliminates the Schottky diode that is
used in some systems for protecting the microprocessor
from reversed-output-voltage damage. Furthermore,
adaptive shoot-through protection is implemented on both
switching edges to provide optimal dead time and minimize
conduction losses. Bootstrap circuitry permits greater
enhancement of the upper MOSFET. The driver is available
in a 8-lead SOIC package and a space economical 3x3mm
8-lead MLFP package. For a more detailed description of the
ISL6609, refer to the device data sheet [2].
2
20-lead MLFP package with some space savings.
April 4, 2006
|
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
Tri-State® is a registered trademark of National Semiconductor Corp.
Copyright © Intersil Americas Inc. 2003, 2006. All Rights Reserved
Author: Chun Cheung
AN1044.2
2

Related parts for ISL6558EVAL2

ISL6558EVAL2 Summary of contents

Page 1

... Term Definitions, Reference, Schematics, Bill of Materials, and Layout are included at the end of this application note. 1 ISL6558EVAL2 - Low-Profile, 5V/12V Input, 500kHz, and 90% Efficiency DC/DC Converter April 4, 2006 Intersil’s ISL6558 and ISL6609 The ISL6558 controller, coupled with ISL6609 single- ...

Page 2

VSEN 0 X1.15 SOFT- START AND FAULT LOGIC COMP 0.8V REFERENCE FB DROOP VCC EN VCC PWM FIGURE 2. SIMPLIFIED ISL6558 AND ISL6609 INTERNAL STRUCTURE 2 Application Note 1044 ISL6558 VCC PGOOD POWER-ON ...

Page 3

... Summary of Design Table 1 summarizes the specifications of a power converter for mid-range router applications. The ISL6558 and ISL6609 based evaluation board has been designed to meet these criteria. TABLE 1. ISL6558EVAL2 SPECIFICATIONS PARAMETER CONDITION MIN Input Voltage VIN 4.5V Output Regulation 0.1% R16 1.336 ...

Page 4

... Experimental Results The ISL6558EVAL2 evaluation board as configured is capable of 30A continuous load current and handling 200A/µs or higher speed load transients. The evaluation board meets the design specifications indicated in Table 1. Table 4 summarizes the equipment that was used for the performance evaluation. TABLE 4. EQUIPMENT LIST ...

Page 5

Figure 4 shows the efficiency for various frequencies and airflow conditions 465K, 200 LFM 500K, 200 LFM 500K, 0 LFM ...

Page 6

V = (5A/V) O FIGURE 7. TRANSIENT RESPONSE AT NO LOAD ( (5A/V) O FIGURE 8. STEP-UP TRANSIENTS AT NO LOAD ( (5A/V) O ...

Page 7

... Figure 15. Conclusion The superior performance of Intersil’s ISL6558 four-phase controller, coupled with Intersil’s ISL6609 driver, has been demonstrated in the low-profile reference design of a 40W, 500kHz interleaved DC/DC buck converter. An ultra high efficiency of 90% at 1.35V output and 30A full load has been achieved ...

Page 8

... V Input Voltage IN Vo Output Voltage 8 Application Note 1044 References Intersil documents are available on the web at http://www.intersil.com. [1] Intersil’s ISL6558 Data Sheet. [2] Intersil’s ISL6609 Data Sheet. [3] Intersil’s ISL6557A Data Sheet Appendix 1. Schematics of Reference Design and Load Transient Generator. 2. Bill of Materials and Layout of Evaluation Board. ...

Page 9

... NC NC Q12 4 300nH Q13 4 3 Q14 2 C24 22u, DNP PHASE 3 TP8 C25 3 PHASE3 Q15 Q16 4 300nH Q17 4 C28 1u Intersil Corporation Endura Power Management 4020 Sturrup Creek Drive Durham, NC 27703 Size Title Custom ISL6558EVAL2, 5V-TO-1.35V@30A, 500kHz Date: Wednesday, November 20, 2002 Sheet Rev ...

Page 10

... R32 0.1 6.5A STEP R35 C90 0.1 10uF Intersil Corporation Endura Power Management 4020 Sturrup Creek Drive Durham, NC 27703 Size Title Custom ISL6558EVAL2, 5V-TO-1.35V@30A, 500kHz Date: Thursday, December 26, 2002 J5 1 VOUT J6 1 GND Q18 HUF761 TP11 TRANS. LO R33 DNP R36 ...

Page 11

Bill of Materials QUANTITY REFERENCE 1 CR1 0 C1, C25 0 C2 C4, C5 C7, C8 C10 10 C11, C12, C15, C17, C21, C24, C27, C28, C79, C89 0 C13, C16, C22, C23, C26 ...

Page 12

... 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 13

Application Note 1044 FIGURE 16. TOP LAYER SILK SCREEN FIGURE 17. BOTTOM LAYER SILK SCREEN 13 AN1044.2 April 4, 2006 ...

Page 14

Application Note 1044 FIGURE 18. TOP LAYER COMPONENT SIDE FIGURE 19. LAYER 2 14 AN1044.2 April 4, 2006 ...

Page 15

Application Note 1044 FIGURE 20. LAYER 3 FIGURE 21. LAYER 4 15 AN1044.2 April 4, 2006 ...

Page 16

Application Note 1044 FIGURE 22. LAYER 5 FIGURE 23. BOTTOM LAYER COMPONENT SIDE 16 AN1044.2 April 4, 2006 ...

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