概要

The ISL6545, ISL6545A makes simple work out of implementing a complete control and protection scheme for a DC/DC stepdown converter driving N-Channel MOSFETs in a synchronous buck topology. Since it can work with either 5V or 12V supplies, this one IC can be used in a wide variety of applications within a system. The ISL6545, ISL6545A (hereafter referred to as ISL6545x, except as needed) integrates the control, gate drivers, output adjustment, monitoring and protection functions into a single 8 Ld SOIC or 10 Ld DFN package. The ISL6545x provides single feedback loop, voltage-mode control with fast transient response. The output voltage can be precisely regulated to as low as 0. 6V, with a maximum tolerance of ±1. 0% over-temperature and line voltage variations. A selectable fixed frequency oscillator (ISL6545 for 300kHz; ISL6545A for 600kHz) reduces design complexity, while balancing typical application cost and efficiency. The error amplifier features a 20MHz gain-bandwidth product and 9V/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 lower MOSFET to inhibit PWM operation appropriately. This approach simplifies the implementation and improves efficiency by eliminating the need for a current sense resistor.

ISL6545_ISL6545A Functional Diagram
ISL6545_ISL6545A Functional Diagram
  • Operates from +5V or +12V Supply Voltage (for bias)
  • 1.0V to 12V VIN Input Range (up to 20V possible with restrictions; see Input Voltage Considerations)
  • 0.6V to VIN Output Range
  • Integrated Gate Drivers use VCC (5V to 12V)
  • 0.6V Internal Reference; ±1.0% tolerance
  • Simple Single-Loop Control Design
  • Voltage-Mode PWM Control
  • Drives N-Channel MOSFETs
  • Traditional Dual Edge Modulator
  • Fast Transient Response
  • High-Bandwidth Error Amplifier
  • Full 0% to 100% Duty Cycle
  • Lossless, Programmable Overcurrent Protection
  • Uses Lower MOSFET's rDS(ON)
  • Small Converter Size in 8 Ld SOIC or 10 Ld DFN
  • 300kHz or 600kHz Fixed Frequency Oscillator
  • Fixed Internal Soft-Start, Capable into a Pre-biased Load
  • Integrated Boot Diode
  • Enable/Shutdown Function on COMP/SD Pin
  • Output Current Sourcing and Sinking
  • Pb-Free (RoHS Compliant)

アプリケーション

  • Power Supplies for Microprocessors or Peripherals PCs, Embedded Controllers, Memory Supplies DSP and Core Communications Processor Supplies
  • Subsystem Power Supplies PCI, AGP; Graphics Cards; Digital TV SSTL-2 and DDR/DDR2/DDR3 SDRAM Bus Termination Supply
  • Cable Modems, Set Top Boxes, and DSL Modems
  • Industrial Power Supplies; General Purpose Supplies
  • 5V or 12V-Input DC/DC Regulators
  • Low-Voltage Distributed Power Supplies

ドキュメント

設計・開発

ECADモデル

[製品選択]テーブル内の製品名をクリックするとSamacSysが提供する回路図シンボル、PCBフットプリント、3D CADモデルがご確認いただけます。 お探しのシンボルやモデルが見つからない場合、Webサイトから直接リクエストできます。

ECADモデルを調べる
Diagram of ECAD Models

製品選択

    Processing table
    Pkg. Type
    Carrier Type
    Temp. Range
    Moisture Sensitivity Level (MSL)
    Price (USD) | 1ku
    ご購入 / サンプル
    型名
    ISL6545CBZ-T
    circleアクティブ
    memory
    spa
    view_in_ar
    サンプル入手可能
    今すぐ購入する
    		SOICN Reel 0 to +70°C 3 1.415 サンプルを入手,
    ISL6545IBZ
    circleアクティブ
    memory
    spa
    view_in_ar
    サンプル入手可能
    今すぐ購入する
    		SOICN Tube -40 to +85°C 3 サンプルを入手,
    ISL6545IBZ-T
    circleアクティブ
    memory
    spa
    view_in_ar
    サンプル入手可能
    今すぐ購入する
    		SOICN Reel -40 to +85°C 3 1.541 サンプルを入手,
    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