ISL6553EVAL1

Manufacturer Part NumberISL6553EVAL1
DescriptionEVALUATION BOARD ISL6553
ManufacturerIntersil
SeriesEndura™
ISL6553EVAL1 datasheets
 


Specifications of ISL6553EVAL1

Main PurposeSpecial Purpose DC/DC, VRM SupplyOutputs And Type1, Non-Isolated
Power - Output45WVoltage - Output1.5V
Current - Output30AVoltage - Input5V, 12V
Regulator TopologyBuckFrequency - Switching350kHz
Board TypeFully PopulatedUtilized Ic / PartHIP6601, ISL6553
Lead Free Status / RoHS StatusContains lead / RoHS non-compliant  
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Data Sheet
Microprocessor CORE Voltage Regulator
Multi-Phase Buck PWM Controller
The ISL6553 multi-phase PWM control IC together with its
companion gate drivers, the HIP6601, HIP6602 or HIP6603
provides a precision voltage regulation system for advanced
microprocessors. Multi-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 will have a ripple frequency of 700kHz. Moreover,
greater converter bandwidth of this design results in faster
response to load transients.
Outstanding features of this controller IC include
programmable VID codes from the microprocessor that
range from 1.05V to 1.825V with a system accuracy of ±1%.
Pull up currents on these VID pins eliminates the need for
external pull up resistors. In addition “droop” compensation,
used to reduce the overshoot or undershoot of the CORE
voltage, is easily programmed with a single resistor.
Another feature of this controller IC is the PGOOD monitor
circuit which is held low until the CORE voltage increases,
during its Soft-Start sequence, to within 10% of the
programmed voltage. Over-voltage, 15% above programmed
CORE voltage, results in the converter shutting down and
turning the lower MOSFETs ON to clamp and protect the
microprocessor. Under voltage is also detected and results
in PGOOD low if the CORE voltage falls 10% below the
programmed level. Over-current protection reduces the
regulator RMS output current to 41% of the programmed
over-current trip value. These features provide monitoring
and protection for the microprocessor and power system.
1
August 2004
Features
• Multi-Phase Power Conversion
• Precision Channel Current Sharing
- Loss Less Current Sampling - Uses r
• Precision CORE Voltage Regulation
- ±1% System Accuracy Over Temperature
• Microprocessor Voltage Identification Input
- 5-Bit VID Input
- 1.05V to 1.825V in 25mV Steps
- Programmable “Droop” Voltage
• Fast Transient Recovery Time
• Over Current Protection
• High Ripple Frequency, (Channel Frequency) Times
Number Channels . . . . . . . . . . . . . . . . . .100kHz to 3MHz
• Pb-free available
Related Literature
• Technical Brief TB363 “Guidelines for Handling and
Processing Moisture Sensitive Surface Mount Devices
(SMDs)”
Ordering Information
PART NUMBER
TEMP. (
ISL6553CB
0 to 70
ISL6553CBZ (Note)
0 to 70
ISL6553EVAL1
Evaluation Platform
*Add “-T” suffix to part number for tape and reel packaging.
NOTE: Intersil Pb-free products employ special Pb-free material sets; molding
compounds/die attach materials and 100% matte tin plate termination finish, which
is 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-020B.
Pinout
ISL6553 (SOIC)
VID3
1
VID2
2
VID1
3
VID0
4
VID25mV
5
COMP
6
FB
7
FS/DIS
8
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
|
1-888-INTERSIL or 321-724-7143
Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2000, 2004. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
ISL6553
FN4931.1
DS(ON)
PKG. DWG.
o
C)
PACKAGE
#
16 Ld SOIC
M16.15
16 Ld SOIC
M16.15
(Pb-free)
TOP VIEW
16
VCC
15
PGOOD
14
ISEN1
13
PWM1
12
PWM2
11
ISEN2
10
VSEN
9
GND

ISL6553EVAL1 Summary of contents

  • Page 1

    ... TEMP. ( ISL6553CB ISL6553CBZ (Note ISL6553EVAL1 Evaluation Platform *Add “-T” suffix to part number for tape and reel packaging. NOTE: Intersil Pb-free products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate termination finish, which is 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-020B ...

  • Page 2

    Block Diagram VSEN X 0.9 X1.15 AND FAULT COMP VID3 VID2 VID1 D/A VID0 VID25mV FB Simplified Power System Diagram VSEN PWM 1 ISL6553 PWM 2 VID 2 ISL6553 PGOOD VCC POWER-ON RESET (POR LATCH CLOCK ...

  • Page 3

    Functional Pin Description VID3 1 16 VID2 2 15 VID1 3 14 VID0 4 13 VID25mV 5 12 COMP FS/DIS 8 VID3 (Pin 1), VID2 (Pin 2), VID1 (Pin 3), VID0 (Pin 4) and VID25mV ...

  • Page 4

    Typical Application - Two Phase Converter Using an HIP6602 Gate Driver FB COMP VCC VSEN ISEN1 PGOOD PWM1 VID3 MAIN VID2 CONTROL ISL6553 VID1 VID0 PWM2 VID25mV ISEN2 FS/DIS GND 4 ISL6553 +5V BOOT1 +12V UGATE1 VCC PHASE1 LGATE1 PWM1 ...

  • Page 5

    Absolute Maximum Ratings Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .+7V ...

  • Page 6

    ERROR AMPLIFIER CORRECTION - ∑ PROGRAMMABLE REFERENCE + ∑ DAC - I AVERAGE - + ∑ ∑ CORRECTION FIGURE 1. SIMPLIFIED BLOCK DIAGRAM OF THE ISL6553 VOLTAGE AND CURRENT CONTROL LOOPS FOR ...

  • Page 7

    Droop Compensation In addition to control of each power ...

  • Page 8

    Figure 5 shows the regulator operating from an ATX supply. In this figure, note the slight rise in PGOOD as the 5V supply rises. The PGOOD output stage is made up of NMOS and PMOS transistors. On the rising VCC ...

  • Page 9

    Under-Voltage The VSEN pin also detects when the CORE voltage falls more than 10% below the VID programmed level. This causes PGOOD to go low, but has no other effect on operation and is not latched. There is also hysteresis ...

  • Page 10

    COMP FB SAWTOOTH ERROR GENERATOR AMPLIFIER CORRECTION - + + - DIFFERENCE REFERENCE DAC TO OTHER CHANNELS TO OVER + CURRENT - TRIP COMPARATOR FIGURE 7. SIMPLIFIED FUNCTIONAL BLOCK DIAGRAM SHOWING CURRENT AND VOLTAGE ...

  • Page 11

    With a high dv/dt load transient, typical of high performance microprocessors, the largest deviations in output voltage occur at the leading and trailing edges of the load transient. In order to fully utilize the output-voltage tolerance range, the output voltage ...

  • Page 12

    ... Careful component selection, tight layout of the critical components, and short, wide circuit traces minimize the magnitude of voltage spikes. Contact Intersil for evaluation board drawings of the component placement and printed circuit board. There are two sets of critical components in a DC-DC converter using a ISL6553 controller and a HIP6601 gate driver ...

  • Page 13

    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 for the microprocessor CORE is characterized by high slew rate (di/dt) current demands. In ...

  • Page 14

    ... The diode's rated reverse breakdown voltage must be greater than the maximum input voltage. References Intersil documents are available on the web at www.intersil.com/ [1] HIP6601/HIP6603 Data Sheet, Intersil Corporation, File No. 4819 [2] HIP6602 Data Sheet, Intersil Corporation, File No. 4838 2 × × × × I ...

  • Page 15

    ... 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 reli- able. 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 ...