概要

The RAA211835 is a DC/DC asynchronous step-down (Buck) regulator that supports a 4.5V to 75V input voltage range and adjustable output voltage. It can deliver up to continuous 3A of continuous output current with premium load and line regulation performance.

The RAA211835 uses peak-current mode control architecture. Its PWM switching frequency is programmable to provide the best trade-off between transient response and efficiency. It also supports PFM operation to maximize light load efficiency, in addition to an external bias LDO input to further reduce power dissipation across the load range. The regulator also has an internal loop compensation circuit to reduce the external component count and BOM cost.

The RAA211835 provides useful functions such as internal or programmable soft-start and power good indicator. For safe operation, the RAA211835 also offers protection features such as cycle-by-cycle peak and valley current limit, input voltage UVLO, output voltage undervoltage (short-circuit) protection, and thermal shutdown.

RAA211835 Block Diagram
RAA211835 Typical Application Circuit
RAA211835 20 Ld QFN Pin Assignment
RAA211835 16 Ld HTSSOP Pin Assignment
RAA211835 Block Diagram
RAA211835 Typical Application Circuit
RAA211835 20 Ld QFN Pin Assignment
RAA211835 16 Ld HTSSOP Pin Assignment
  • Wide Vin operating range from 4.5V to 75V
  • Adjustable Vout from 0.8V to ~90% of Vin
  • Up to 3A of continuous output current
  • Default 400kHz or adjustable switching frequency from 200kHz to 800kHz
  • ±1% load regulation accuracy from -40°C to 125°C, ±0.5% load regulation accuracy at 25°C
  • 90μA typical quiescent current
  • Internal compensation, fixed 0.5ms SS for QFN and adjustable SS for HTSSOP
  • PFM operation at light load with integrated external bias LDO & Power Good indicator
  • Cycle-by-cycle peak and valley current limit, input voltage UVLO, output voltage undervoltage (short-circuit) protection and thermal shut down

アプリケーション

  • Up to 75V distributed power supplies & general purposes POL
  • Telecommunication base station power supplies
  • Power tools
  • Surveillance
  • Portable mobility/robotic devices
  • Industrial power systems

ドキュメント

= ピックアップ
分類 タイトル 日時
データシート
RAA211835 Datasheet
PDF 3.80 MB
1件

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
RAA211835 iSim:PE Model
 Simulator ルネサス
1件

ソフトウェアダウンロード
分類 タイトル 日時
ソフトウェア／ツール－その他
RAA211630 Family Design Tool
ログインしてダウンロード XLSX 312 KB
1件
RTKA211835DE0000BU

RTKA211835DE0000BU

Evaluation
詳しくはこちら

RAA211835 Synchronous Buck Evaluation Board with 4.5V to 75V Input Range, 3.3V 3A Output (QFN version)

The RTKA211835DE0000BU board demonstrates and quickly evaluates the RAA211835 (QFN version), a DC/DC asynchronous step-down regulator with programmable switching...

主要ドキュメント:
RTKA211835DE0000BU Evaluation Board Manual
RTKA211835DE0010BU

RTKA211835DE0010BU

Evaluation
詳しくはこちら

RAA211835 Synchronous Buck Evaluation Board with 4.5V to 75V Input Range, 3.3V 3A Output (HTSSOP version)

The RTKA211835DE0010BU board demonstrates and quickly evaluates the RAA211835 (HTSSOP version), a DC/DC asynchronous step-down regulator with programmable switching...

主要ドキュメント:
RTKA211835DE0010BU Evaluation Board Manual

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
    Moisture Sensitivity Level (MSL)
    Price (USD) | 1ku
    ご購入 / サンプル
    型名
    RAA211835GNP#HA0
    circleアクティブ
    memory
    view_in_ar
    サンプル入手可能
    今すぐ購入する
    		QFN Reel 3 サンプルを入手,
    RAA211835GSP#HA0
    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
    		TSSOP-EP Reel 3 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

    ビデオ&トレーニング

    Portfolio of 30V-75V Bucks Power the Highest-Precision Loads with Excellent Accuracy

    The RAA211x family of bucks are highly scalable due to its unique pin-compatible wide Vin buck variants with integrated FETs that support up to 5A of continuous output current with premium load and line regulation performance. The RAA211835 supports 75V async buck operation of 3A loadings, while RAA211250/450/630/820 support sync buck operation of 30V 5A, 40V 5A, 60V 3A, 75V 2A respectively.

    Video List
    Portfolio of 30V-75V Bucks Power the Highest-Precision Loads with Excellent Accuracy

    ニュース＆ブログ

    ブログ 2023年5月8日