ISL6527EVAL1

Manufacturer Part NumberISL6527EVAL1
DescriptionEVALUATION BOARD SOIC ISL6527
ManufacturerIntersil
ISL6527EVAL1 datasheet
 


Specifications of ISL6527EVAL1

Main PurposeDC/DC, Step DownOutputs And Type1, Non-Isolated
Voltage - Output0.75 ~ 3VCurrent - Output5A
Voltage - Input3.3 ~ 5VRegulator TopologyBuck
Frequency - Switching300kHzBoard TypeFully Populated
Utilized Ic / PartISL6527Lead Free Status / RoHS StatusContains lead / RoHS non-compliant
Power - Output-  
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Data Sheet
Single Synchronous Buck Pulse-Width
Modulation (PWM) Controller
The ISL6527, ISL6527A make simple work out of
implementing a complete control and protection scheme for
a DC/DC step-down converter. Designed to drive N-Channel
MOSFETs in a synchronous buck topology, the ISL6527,
ISL6527A integrate the control, output adjustment,
monitoring and protection functions into a single package.
The ISL6527, ISL6527A provide simple, single feedback loop,
voltage-mode control with fast transient response. The output
voltage can be regulated to as low as the provided external
reference. A fixed frequency oscillator reduces design
complexity, while balancing typical application cost and
efficiency.
The error amplifier features a 15MHz gain-bandwidth
product and 6V/µs slew rate, which enables high converter
bandwidth for fast transient performance. The resulting
PWM duty cycles range from 0% to 100%.
Protection from overcurrent conditions is provided by
monitoring the r
of the upper MOSFET to inhibit PWM
DS(ON)
operation appropriately. This approach simplifies the
implementation and improves efficiency by eliminating the
need for a current sense resistor.
1
ISL6527, ISL6527A
November 18, 2008
Features
• Operates from 3.3V to 5V Input
• Utilizes an External Reference
• Drives N-Channel MOSFETs
• Simple Single-Loop Control Design
- Voltage-Mode PWM Control
• Fast Transient Response
- High Bandwidth Error Amplifier
- Full 0% to 100% Duty Cycle
• Lossless, Programmable Overcurrent Protection
- Uses Upper MOSFET’s r
• Converter Can Source and Sink Current
• Small Converter Size
- Internal Fixed Frequency Oscillator
- ISL6527: 300kHz
- ISL6527A: 600kHz
• Internal Soft-Start
• 14 Ld SOIC or 16 Ld 5x5 QFN
• QFN package:
- Compliant to JEDEC PUB95 MO-220 QFN - Quad Flat
No Leads - Package Outline
- Near Chip-Scale Package Footprint, which Improves
PCB Efficiency and has a Thinner Profile
• Pb-Free (RoHS compliant)
Applications
• Power Supplies for Microprocessors
- PCs
- Embedded Controllers
• Subsystem Power Supplies
- PCI/AGP/GTL+ Busses
- ACPI Power Control
- DDR SDRAM Bus Termination Supply
• Cable Modems, Set-Top Boxes, and DSL Modems
• DSP and Core Communications Processor Supplies
• Memory Supplies
• Personal Computer Peripherals
• Industrial Power Supplies
• 3.3V Input DC/DC Regulators
• Low Voltage Distributed Power Supplies
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. 2003-2008. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
FN9056.10
DS(ON)

ISL6527EVAL1 Summary of contents

  • Page 1

    ... Low Voltage Distributed Power Supplies 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. 2003-2008. All Rights Reserved All other trademarks mentioned are the property of their respective owners. FN9056.10 ...

  • Page 2

    ... ISL6527CBZ* 6527CBZ ISL6527CRZ* ISL6527 CRZ ISL6527IBZ* 6527IBZ ISL6527IRZ* ISL6527 IRZ ISL6527EVAL1 ISL6527 SOIC Evaluation Board ISL6527EVAL2 ISL6527 QFN Evaluation Board ISL6527AEVAL1 ISL6527A SOIC Evaluation Board ISL6527AEVAL2 ISL6527A QFN Evaluation Board *Add “-T” suffix for tape and reel. Please refer to TB347 for details on reel specifications. ...

  • Page 3

    Typical Application - 3.3V Input 3. CT1 C PUMP CT2 CPGND GND V REF_IN REF 3 ISL6527, ISL6527A VCC OCSET/SD CPVOUT ISL6527, D BOOT ISL6527A BOOT C BOOT UGATE PHASE LGATE COMP ...

  • Page 4

    Typical Application - 5V Input + CT1 N/C CT2 CPGND GND V REF_IN REF Block Diagram VCC CT1 CHARGE PUMP CT2 CPGND OCSET/SD 20μA REF_IN FB COMP 4 ISL6527, ISL6527A VCC OCSET/SD CPVOUT ISL6527, D BOOT ISL6527A BOOT ...

  • Page 5

    Functional Pin Description 14 LD (SOIC) TOP VIEW GND 1 LGATE 2 3 CPVOUT 4 CT1 CT2 5 OCSET/ 5X5 (QFN) TOP VIEW CPVOUT 1 CT1 2 CT2 3 OCSET/ ...

  • Page 6

    ... ISL6527, ISL6527A Thermal Information Thermal Resistance SOIC Package (Note QFN Package (Notes 2, 3 +7.0V Maximum Junction Temperature . . . . . . . . . . . . . . . . . . . . . +150°C Maximum Storage Temperature Range . . . . . . . . . .-65°C to +150°C Pb-free Reflow Profile . . . . . . . . . . . . . . . . . . . . . . . . .see link below http://www.intersil.com/pbfree/Pb-FreeReflow.asp SYMBOL TEST CONDITIONS I BIAS POR Commercial Industrial f ...

  • Page 7

    Electrical Specifications Recommended Operating Conditions, unless otherwise noted V PARAMETER PROTECTION/DISABLE OCSET Current Source Disable Threshold NOTE: 4. Limits should be considered typical and are not production tested. Functional Description Initialization The ISL6527, ISL6527A automatically initialize upon receipt of power. ...

  • Page 8

    Output Voltage Selection The output voltage can be programmed to any level between V and the supplied external reference. An external resistor IN divider is used to scale the output voltage relative to the reference voltage and feed it back ...

  • Page 9

    For an equation for the ripple current see the section under component guidelines titled “Output Inductor Selection” on page 11. A small ceramic capacitor should be placed in parallel with R to smooth the voltage across R OCSET presence of ...

  • Page 10

    VIN ISL6527, ISL6527A VCC CVCC CPVOUT CBP GND D1 BOOT CBOOT Q1 UGATE PHASE PHASE Q2 LGATE COMP KEY ISLAND ON POWER PLANE LAYER ISLAND ON CIRCUIT PLANE LAYER VIA CONNECTION ...

  • Page 11

    Check the compensation gain at F with the capabilities of the error P2 amplifier. The closed loop gain is constructed on the graph of Figure 6 by adding the modulator gain (in dB) ...

  • Page 12

    TRAN t = RISE OUT TRAN t = FALL V OUT where the transient load current ...

  • Page 13

    ... BOOT1 ISL6527, ISL6527A DC/DC Converter Application Circuit Figure 8 shows an application circuit of a DC/DC Converter. Detailed information on the circuit, including a complete Bill-of-Materials and circuit board description, can be found in Application Note AN1021. http://www.intersil.com/data/an/an1021.pdf Q GATE ≥ ---------------------------------------------------- - V V – BOOT1 BOOT2 ...

  • Page 14

    GND TP1 C4 0.22µF 10 0.8V EXTERNAL REFERENCE Component Selection Notes: C3, C8 Each 150mF, Panasonic EEF-UE0J151R or Equivalent 30mA Schottky Diode, MA732 or Equivalent Inductor, Panasonic P/N ETQ-P6F1ROSFA or Equivalent. ...

  • Page 15

    Package Outline Drawing L16.5x5B 16 LEAD QUAD FLAT NO-LEAD PLASTIC PACKAGE Rev 2, 02/08 5.00 6 PIN 1 INDEX AREA (4X) 0.15 TOP VIEW ( TYP ) ( TYPICAL RECOMMENDED LAND PATTERN 15 ...

  • 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 ...