ISL6558EVAL2

Manufacturer Part NumberISL6558EVAL2
DescriptionEVAL BOARD W/6605 DRVRS ISL6558
ManufacturerIntersil
SeriesEndura™
ISL6558EVAL2 datasheets
 


Specifications of ISL6558EVAL2

Main PurposeDC/DC, Step DownOutputs And Type1, Non-Isolated
Voltage - Output1.35VCurrent - Output30A
Voltage - Input4.5 ~ 5.5VRegulator TopologyBuck
Frequency - Switching500kHzBoard TypeFully Populated
Utilized Ic / PartHIP6609, ISL6558Lead Free Status / RoHS StatusContains lead / RoHS non-compliant
Power - Output-  
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Data Sheet
Multi-Purpose Precision Multi-Phase PWM
Controller With Optional Active Voltage
Positioning
The ISL6558 is a multi-phase PWM controller, which in
combination with the HIP6601B, HIP6602B, HIP6603B, or
ISL6605 companion gate drivers form a complete solution
for high-current, high slew-rate applications. The ISL6558
regulates output voltage, balances load currents and
provides protective functions for two to four synchronous
rectified buck converter channels.
A novel approach to current sensing is used to reduce
overall solution cost and improve efficiency. The voltage
developed across the lower MOSFET during conduction is
sampled and fed back to the controller. This lossless
current-sensing approach enables the controller to maintain
phase-current balance between the power channels, provide
overcurrent protection, and permit droop compensation.
Optional output voltage “droop” or active voltage positioning
is supported via the DROOP pin. Taking advantage of this
feature reduces the size and cost of the output capacitors
required to support a load transient.
In the event of an overvoltage, the controller monitors and
responds to reduce the risk of damage to load devices.
Undervoltage conditions are indicated through a PGOOD
transition. Overcurrent conditions cause the converter to
shutdown limiting the exposure of load devices. These
integrated monitoring and protection features provide a safe
environment for microprocessors and other advanced low
voltage circuits.
1
June 21, 2005
Features
• Pb-Free Plus Anneal Available (RoHS Compliant)
• Multi-Phase Power Conversion
- 2-, 3-, or 4-Phase Operation
• Optional Output Voltage Droop
• Precision Channel-Current Balance
• Lossless Current Sensing
• Precision Reference Voltage
- 0.8V ± 1.5% Over -40
- 0. 8V ± 1.0% Over 0
• Fast Transient Response
• Overcurrent and Overvoltage Protection
• Digital Soft-start
• Power Good Indication
• High Ripple Frequency (80kHz to 1.5MHz)
• QFN Package
- Compliant to JEDEC PUB95 MO-220 QFN-Quad Flat
No Leads-Product Outline
- Near Chip-Scale Package Footprint; Improves PCB
Efficiency and Thinner in Profile
Applications
• Power Supply Control for Microprocessors
• Low Output Voltage, High Current DC-DC Converters
• Voltage Regulator Modules
• Servers and Workstations
• Memory and Accelerated Graphics Port Supplies
• Communication Processor and Personal Computer
Peripherals
Pinouts
ISL6558 (16 LEAD SOIC)
TOP VIEW
V
1
16
PWM4
CC
PGOOD
2
15
ISEN4
COMP
3
14
ISEN1
DROOP
4
13
PWM1
FB
5
12
PWM2
VSEN
6
11
ISEN2
FS/EN
10
ISEN3
7
GND
8
9
PWM3
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
|
1-888-INTERSIL or 1-888-468-3774
Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2001-2005. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
ISL6558
FN9027.12
C - 85
C Range
°
°
C - 70
C Range
°
°
ISL6558 (20 LEAD 5X5 QFN)
TOP VIEW
20
19
18
17
16
COMP
1
15
ISEN1
N/C
2
14
PWM1
13
DROOP
3
PWM2
12
FB
4
ISEN2
VSEN
5
11
ISEN3
6
7
8
9
10

ISL6558EVAL2 Summary of contents

  • Page 1

    ... CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. | 1-888-INTERSIL or 1-888-468-3774 Intersil (and design registered trademark of Intersil Americas Inc. Copyright © Intersil Americas Inc. 2001-2005. All Rights Reserved All other trademarks mentioned are the property of their respective owners. ISL6558 FN9027 ...

  • Page 2

    ... Note) (Pb-free) ISL6558EVAL1 Evaluation Platform 1 (SOIC Package, ISL6558CB + HIP6601BCB) ISL6558EVAL2 Evaluation Platform 2 (QFN Package, ISL6558CR + ISL6605CR) NOTE: ntersil 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 ...

  • Page 3

    Block Diagram VSEN - + X 0 X1.15 AND FAULT COMP 0.8V REFERENCE FB DROOP 3 ISL6558 V PGOOD CC POWER-ON RESET (POR LATCH CLOCK AND S SAWTOOTH GENERATOR + ∑ ∑ ...

  • Page 4

    Functional Pin Description NOTE: Pin numbers refer to the SOIC package. Check PINOUT diagrams for QFN pin numbers. VCC (Pin 1) Supplies all the power necessary to operate the chip. The IC starts to operate when the voltage on this ...

  • Page 5

    Typical Application - 3 Phase Converter V = 0.8V )/R OUT DROOP COMP V CC VSEN PWM4 R OS PWM3 PGOOD PWM2 PWM1 PWM CONTROL ISL6558 ...

  • Page 6

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

  • Page 7

    Electrical Specifications Operating Conditions: V PARAMETER POWER GOOD MONITOR Undervoltage Threshold Undervoltage Threshold PGOOD Low Output Voltage PROTECTION Overvoltage Threshold Percent Overvoltage Hysteresis (GNT) GBD = Guaranteed By Design GNT = Guranteed Not Tesed FB ERROR AMPLIFIER CORRECTION - ∑ ...

  • Page 8

    Operation Figure 1 shows a simplified diagram of the voltage regulation and current control loops for a two-phase converter. Both voltage and current feedback are used to precisely regulate output voltage and tightly control phase currents the two ...

  • Page 9

    FB pin, effectively creating the output voltage droop desired as a function of load current. SELECTING R AND output droop compensation is not required the DROOP pin must be left open. ...

  • Page 10

    PWM1, 5V/DIV 0V PWM2, 5V/DIV 0V PWM3, 5V/DIV 0V 0V 1ms/DIV FIGURE 4. FOUR ACTIVE CHANNEL PWM DRIVE SIGNALS The PWM drive signals are switched out of phase. The PWM drive signal phase relationship is 360° divided by the number ...

  • Page 11

    See Figure compared with an internally TOTAL generated overcurrent trip current, I TRIP trip current source is trimmed to 82.5µ the I level, then the controller forces all PWM outputs TRIP into three-state. This condition ...

  • Page 12

    If the output voltage is not the same as the internal 0.8V reference, then a resistor divider scaled like the FB resistors is required as shown is Figure 8. ...

  • Page 13

    IN VCC C PWM BP FS/EN COMP C C ISL6558 VSEN ISEN R FB ISLAND ON POWER PLANE LAYER FIGURE 9. PRINTED CIRCUIT BOARD POWER PLANES AND ISLANDS Component Selection Guidelines OUTPUT CAPACITOR SELECTION ...

  • Page 14

    The total output ripple current can be determined from the curves in Figure 10. They provide the total ripple current as a function of duty cycle and number of active channels, normalized to the parameter K NORM V OUT K ...

  • Page 15

    ... Dimensions D2 and E2 are for the exposed pads which provide improved electrical and thermal performance. 8. Nominal dimensions are provided to assist with PCB Land Pattern Design efforts, see Intersil Technical Brief TB389. 9. Features and dimensions A2, A3, D1, E1, P & θ are present when Anvil singulation method is used and not present for saw singulation. 10. Compliant to JEDEC MO-220VHHC Issue I except for the " ...

  • Page 16

    ... 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 ...