ISL6560EVAL1

Manufacturer Part NumberISL6560EVAL1
DescriptionEVALUATION BOARD ISL6560
ManufacturerIntersil
ISL6560EVAL1 datasheets
 


Specifications of ISL6560EVAL1

Main PurposeSpecial Purpose DC/DC, VRM SupplyOutputs And Type1, Non-Isolated
Power - Output60WVoltage - Output1.5V
Current - Output40AVoltage - Input5V, 12V
Regulator TopologyBuckFrequency - Switching400kHz
Board TypeFully PopulatedUtilized Ic / PartISL6560
Lead Free Status / RoHS StatusContains lead / RoHS non-compliant  
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Data Sheet
Microprocessor CORE Voltage Regulator
Two-Phase Buck PWM Controller
The ISL6560 two-phase current mode, PWM control IC
together with companion gate drivers, the HIP6601A,
HIP6602A, HIP6603A or HIP6604 and MOSFETs provides a
precision voltage regulation system for advanced
microprocessors. Two-phase power conversion is a marked
departure from earlier single phase converter configurations
previously employed to satisfy the ever increasing current
demands of modern microprocessors. Multi-phase
converters, by distributing the power and load current,
results in 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. For example, a two phase converter operating at
350kHz per phase will have a ripple frequency of 700kHz.
Higher converter bandwidth is also achievable, resulting in
faster response to load transients.
An outstanding feature of this controller IC includes high-
side current sensing with a single current sampling resistor
in the input line to the output MOSFET transistors. This
single current sampling resistor monitors each channels
input current assuring excellent current sharing. Current
mode control results in rapid response to changing load
demands.
Also featured are programmable VID codes with an accuracy
of ±0.8% that range from 1.100–1.850V, and are set by the
microprocessor. Pull up currents on these VID pins
eliminates the need for external pull-up resistors.
Another feature of this controller IC is the PWRGD monitor
circuit and load protection circuits which provide overvoltage
protection, overcurrent protection and undervoltage
indication.
Ordering Information
PART NUMBER
TEMP. (°C)
PACKAGE
ISL6560CB
0 to 70
16 Ld SOIC
ISL6560CB-T
16 Ld SOIC Tape and Reel
ISL6560CBZ
0 to 70
16 Ld SOIC
(See Note)
(Pb-free)
ISL6560CBZ-T
16 Ld SOIC Tape and Reel (Pb-free)
(See Note)
ISL6560/62EVAL1
Evaluation Platform
NOTE: Intersil Pb-free 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-020C.
1
October 22, 2004
Features
• Two-phase power conversion
• Precision channel current sharing
• Precision CORE voltage regulation
- ±0.8% accuracy
• Microprocessor voltage identification input
- VRM 9.0 compliant
- 5-bit VID input
- 1.100 to 1.850V in 25mV steps
- Programmable “droop” voltage
• Fast transient recovery time
• Overcurrent protection
• High output ripple frequency. . . . . . . . . . . . . 100kHz to 2MHz
• Pb-Free Available (RoHS Compliant)
Applications
• VRM9.X modules
• AMD Athlon™ processor voltage regulator
• Low output voltage, high current DC/DC converters
Related Literature
• Technical Brief TB363 Guidelines for Handling and
Processing Moisture Sensitive Surface Mount Devices
(SMDs)
Pinout
PKG.
DWG.#
M16.15
M16.15
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143
Athlon™ is a trademark of Advanced Micro Devices, Inc.
ISL6560
FN9011.3
ISL6560 (SOIC)
TOP VIEW
VID4
1
16
VCC
VID3
2
15
REF
VID2
3
14
CS-
VID1
4
13
PWM1
VID0
5
12
PWM2
COMP
6
11
CS+
FB
7
10
PWRGD
CT
8
9
GND
|
Intersil and Design is a trademark of Intersil Americas Inc.
|
Copyright © Intersil Americas Inc. 2003, 2004, All Rights Reserved

ISL6560EVAL1 Summary of contents

  • Page 1

    ... FN9011.3 ISL6560 (SOIC) TOP VIEW VID4 1 16 VCC VID3 2 15 REF VID2 3 14 CS- VID1 4 13 PWM1 VID0 5 12 PWM2 COMP PWRGD GND | Intersil and Design is a trademark of Intersil Americas Inc. | Copyright © Intersil Americas Inc. 2003, 2004, All Rights Reserved ...

  • Page 2

    Block Diagram PWRGD VID4 VID3 VID2 D/A VID1 VID0 FB COMP Simplified Power System Diagram FB SYNCHRONOUS PWM 1 RECTIFIED BUCK CHANNEL ISL6560 SYNCHRONOUS PWM 2 RECTIFIED BUCK CHANNEL VID Functional Pin Description VID4 VID3 VID2 ...

  • Page 3

    Absolute Maximum Ratings Supply Voltage (VCC -0.3V to 15V CS+. CS ...

  • Page 4

    Electrical Specifications Recommended Operating Conditions, Unless Otherwise Noted PARAMETER Input Bias Current Maximum Output Voltage Output Disable Threshold FB Low Foldback Threshold -3dB Bandwidth CURRENT SENSE Threshold Voltage Current Limit Foldback Voltage ∆V /∆V COMP CS Input Bias Current Response ...

  • Page 5

    ISL6560 5 FN9011.3 ...

  • Page 6

    General Circuit Description R SENSE INPUT VOLTAGE CS+ + Current Comparator RESET COMP R L Reference Voltage REF FIGURE 1. FUNCTIONAL SYSTEM BLOCK DIAGRAM SHOWING MAJOR COMPONENTS The ISL6560 is a two-power channel, current mode PWM controller with input current ...

  • Page 7

    Also observe as the output load demand increases, driving the inverting input of the error amplifier lower, the output voltage of the error amplifier ...

  • Page 8

    Design Example This section will highlight a 40A converter, providing the design details for the entire supply. The hardware realization of this design is the ISL6560/62 Evaluation Board. For this example a 40A supply down converting from 12V will be ...

  • Page 9

    Frequency = Channel fsw 1 0.1 0.01 100nH 1µH Inductance FIGURE 6. INDUCTOR SELECTION CURVES These curves help to visualize that in some cases, major changes in some parameters only result in subtle changes in other parameters. For example, ...

  • Page 10

    To calculate the dissipation in the 5mΩ resistor, we used only half of the ripple current, 4A, to give a nominal dissipation of: 1. ------------ RMS 12V 2 2 ∴ × × Power = ...

  • Page 11

    MOSFET Selection and Considerations In high-current PWM applications, the MOSFET power dissipation, package selection and heatsink are the dominant design factors. The power dissipation includes two loss components; conduction loss and switching loss. These losses are distributed between the upper ...

  • Page 12

    Current sense is critical, especially at lower current levels where the current comparator threshold voltage is lower. A good Kelvin connection requires that the voltage sample must be taken at the R SENSE not at the planes to which ...

  • Page 13

    ISL6560 Supply Design Sequence Please note several changes from the computations in the body of the data sheet. An operating frequency of 400kHz was chosen. A 15mV offset voltage was added to the no- load output voltage to show the ...

  • Page 14

    ... 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 ...