概要

The ISL8023A is a highly efficient, monolithic, synchronous step-down DC/DC converter that can deliver 3A of continuous output current from a 2.7V to 5.5V input supply. The device uses current mode control architecture to deliver very low-duty cycle operation at high frequency with fast transient response and excellent loop stability. It has an adjustable frequency from 500kHz to 4MHz with the default at 2MHz (ISL8023A/24A).

The ISL8023 integrates a very low ON-resistance P-Channel (45mΩ) high-side FET and N-Channel (19mΩ) low-side FET to maximize efficiency and minimize external component count. The 100% duty-cycle operation allows less than 200mV dropout voltage at 4A output current. The operation frequency of the pulse-width modulator (PWM) is adjustable from 500kHz to 4MHz. The default switching frequency of 1MHz is set by connecting the FS pin high, which allows for the use of small external components.

The ISL8023 can be configured for discontinuous or forced continuous operation at light load. Forced continuous operation reduces noise and RF interference while discontinuous mode provides higher efficiency by reducing switching losses at light loads.

Fault protection is provided by internal hiccup mode current limiting during short circuit and overcurrent conditions. Other protection, such as overvoltage and over-temperature are also integrated into the device. A power-good output voltage monitor indicates when the output is in regulation.

The ISL8023 offers a 1ms power-good (PG) timer at power-up. When in shutdown, the device discharges the output capacitor through an internal soft-stop switch. Other features include internal fixed or adjustable soft-start and internal/external compensation. The ISL8023 is offered in a space-saving 16 Ld 3mm x 3mm Pb-free QFN package with an exposed pad for improved thermal performance and 1mm maximum height. The complete converter occupies less than 0.22 in² area.

Various fixed output voltages are available upon request. See the datasheet for more details.

ISL8023_ISL8024 Functional Diagram
ISL8023_ISL8024 Functional Diagram
  • 2.7V to 5.5V input voltage range
  • Very low ON-resistance FETs - P-Channel 45mΩ and N-Channel 19mΩ typical values
  • High-efficiency synchronous buck regulator with up to 95% efficiency
  • 0.8% reference accuracy over temperature/load/line
  • Complete BOM with as few as 3 external parts
  • Start-up with pre-biased output
  • Internal soft-start - 1ms or adjustable
  • Soft-stop output discharge during disabled
  • Adjustable frequency from 500kHz to 4MHz - Default at 1MHz (8023), 2MHz (8023A)
  • External synchronization up to 4MHz
  • Over-temperature, overcurrent, overvoltage, and negative overcurrent protection
  • Tiny 3mm x 3mm QFN package

アプリケーション

  • DC/DC POL modules
  • μC/µP, FPGA and DSP power
  • Plug-in DC/DC modules for routers and switchers
  • Portable instruments
  • Test and measurement systems
  • Li-ion battery-powered devices

ドキュメント

設計・開発

ソフトウェア／ツール
iSim:PEオフラインシミュレーションツール
iSim Personal Edition（iSim：PE）は、プロジェクトの早い段階で設計サイクルを速め、プロジェクト初期のリスクを低減し、現在のみならず次世代の設計に耐えうる部品を選定します。
ダウンロード
ISL8023 iSim:PE Model
 Simulator ルネサス
1件
ISL802xEVAL3Z,ISL802xAEVAL3Z Synchronous Buck Regulator Eval Board

ISL8023AEVAL3Z

Evaluation
詳しくはこちら

ISL8023A Compact Synchronous Buck Regulator Evaluation Board

The ISL8023AEVAL3Z kit is intended for use by individuals with requirements for point-of-load (POL) applications sourcing from 2.7V to 5.5V. This simple smallest factor...

主要ドキュメント:
ISL8023, ISL8023A, ISL8024, ISL8024A Datasheet

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
    PLP
    Pkg. Type
    Carrier Type
    Moisture Sensitivity Level (MSL)
    Price (USD) | 1ku
    ご購入 / サンプル
    型名
    ISL8023AIRTAJZ
    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
    		2033 12月 TQFN Tray 3 0.8156 サンプルを入手,
    ISL8023AIRTAJZ-T
    circleアクティブ
    memory
    spa
    view_in_ar
    		2033 12月 TQFN Reel 3
    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