Overview

The ISL6526, ISL6526A make simple work out of implementing a complete control and protection scheme for a DC/DC stepdown converter. Designed to drive N-Channel MOSFETs in a synchronous buck topology, the ISL6526, ISL6526A integrate the control, output adjustment, monitoring and protection functions into a single package. The ISL6526, ISL6526A provide simple, single feedback loop, voltage-mode control with fast transient response. The output voltage can be precisely regulated to as low as 0.8V, with a maximum tolerance of ±1.5% over-temperature and line voltage variations. 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 rDS(ON) of the upper MOSFET to inhibit PWM operation appropriately. This approach simplifies the implementation and improves efficiency by eliminating the need for a current sense resistor.

ISL6526_ISL6526A Functional Diagram
ISL6526_ISL6526A Functional Diagram
  • Operates from 3.3V to 5V Input
  • 0.8V to VIN Output Range
  • 0.8V Internal Reference
  • ±1.5% Over Load, Line Voltage and Temperature
  • 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 rDS(ON)
  • Converter can Source and Sink Current
  • Small Converter Size
  • Internal Fixed Frequency Oscillator
  • ISL6526: 300kHz
  • ISL6526A: 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+ Buses
  • 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
  • 33V-Input DC/DC Regulators
  • Low-Voltage Distributed Power Supplies

Documentation

= Featured Documentation
Type Title Date
Datasheet
ISL6526, ISL6526A Datasheet
PDF 865 KB
End Of Life Notice
PLC18018 - General Q3 Product Life Cycle Notice
PDF 388 KB
Product Change Notice
PCN14011 - Alternate Manufacturing Facilities for Assembly of the Listed Intersil DFN/TDFN/QFN Packaged Products -Carsem (CAS) - Ipoh, Malaysia
PDF 225 KB
Product Change Notice
PCN12085 - 8l, 14l, 16l SOIC w/ Gold Bond Wire @ ATP as Alternate Assembly Site
PDF 152 KB
Application Note
AN1681: Grounding Techniques
PDF 509 KB
Application Note
AN1684: Nonideality of Ground
PDF 397 KB
Other
TB417: Designing Stable Compensation Networks for Single Phase Voltage Mode Buck Regulators
PDF 562 KB
Application Note
AN1021: Embedded DC-DC Converters Using ISL6526 and ISL6527 PWM Controller ICs
PDF 839 KB
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Design & Development

Software & Tools
iSim:PE Offline Simulation Tool
iSim Personal Edition (iSim:PE) speeds the design cycle and reduces risk early in any project, identifying parts that can be used in current as well as next-generation designs.
Downloads
ISL6526 iSim:PE Model
 Simulator Renesas
1 item

ECAD Models

Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on products in the Product Options table. If a symbol or model isn't available, it can be requested directly from the website.

Explore ECAD Models
Diagram of ECAD Models

Product Options

    Processing table
    Pkg. Type
    Carrier Type
    MOQ
    Buy / Sample
    Part Number
    ISL6526CBZ
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    memory
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    		SOICN Tube 2000
    ISL6526CBZ-T
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    view_in_ar
    		SOICN Reel 2500
    ISL6526IBZ
    circleObsolete
    memory
    view_in_ar
    		SOICN Tube 2000
    ISL6526IBZ-T
    circleObsolete
    memory
    view_in_ar
    		SOICN Reel 2500
    ISL6526IRZ
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    memory
    spa
    view_in_ar
    		QFN Tube 1200
    ISL6526IRZ-T
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    memory
    spa
    view_in_ar
    		QFN Reel 6000
    ISL6526IRZ-TK
    circleObsolete
    memory
    spa
    view_in_ar
    		QFN Reel 3000
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