电源管理

概览

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)

应用

  • 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

文档

文档标题
类型 		日期
ISL6526, ISL6526A Datasheet
PDF 865 KB 		数据手册
Industrial Power Management Brochure
PDF 5.51 MB 日文 		手册
AN1681: Grounding Techniques
PDF 509 KB 		应用文档
AN1684: Nonideality of Ground
PDF 397 KB 		应用文档
TB417: Designing Stable Compensation Networks for Single Phase Voltage Mode Buck Regulators
PDF 562 KB 		其他
AN1021: Embedded DC-DC Converters Using ISL6526 and ISL6527 PWM Controller ICs
PDF 839 KB 		应用文档
6 items

设计和开发

软件与工具
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.
下载
ISL6526A iSim:PE Model
 Simulator 瑞萨电子
1 item

ECAD 模块

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.

扩展 ECAD 模块
Diagram of ECAD Models

模型

文档标题
类型 日期
ISL6526A iSim:PE Model
SXSCH 102 KB 		模型 - iSim
1 item

产品选择

    Processing table
    Pkg. Type
    Carrier Type
    MOQ
    购买 / 样片
    器件号
    ISL6526AIRZ
    block_flippedObsolete
    memory
    spa
    view_in_ar
    		QFN Tube 1200
    ISL6526AIRZ-T
    block_flippedObsolete
    memory
    spa
    view_in_ar
    		QFN Reel 6000
    ISL6526AIRZ-TK
    block_flippedObsolete
    memory
    spa
    view_in_ar
    		QFN Reel 1000
    Parametric Table tips

    Tips for Using This Parametric Table:

    • Hide Filters button in header: Collapse or expands filters
    • Column sort buttons in header: Sort Column alphabetically / numerically descending or ascending
    • Reset button in header: Reset all filters to the page default
    • Full Screen button in header: Expand the table to full screen view (user must close out of full screen before they can interact with rest of page)
    • Export button in header: Export the filtered results of the table to an Excel document
    • Filter parts search bar in header: Type to filter table results by part number
    • Hide column button in column headers: Select to hide columns in table
    • AND / OR toggle switches in header: Toggles the logic of this particular filter to be “AND” or “OR” logic for filtering results
    • Multiselect checkboxes at beginning of each row in table: Select these checkboxes to compare products against each other
    • Document icon next to product name in row: View the featured document for this product
    • Chip icon next to the right of the document icon in row: View the block diagram for this product
    • Cart icon to the right of the chip icon: Indicates that samples are available for this product