概要

The RAA211820 is a DC/DC synchronous step-down (Buck) regulator that supports a 4.5V to 75V input voltage range and adjustable output voltage. It can deliver up to continuous 2A of continuous output current with premium load and line regulation performance.

The RAA211820 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 and DEM 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 RAA211820 provides useful functions such as internal or programmable soft-start and power good indicator. For safe operation, the RAA211820 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.

RAA211820 Block Diagram
RAA211820 Typical Application Circuit
RAA211820 20 Ld QFN Pin Assignment
RAA211820 16 Ld HTSSOP Pin Assignment
RAA211820 Block Diagram
RAA211820 Typical Application Circuit
RAA211820 20 Ld QFN Pin Assignment
RAA211820 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 2A 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
  • 95μA typical quiescent current
  • Internal compensation, fixed 0.5ms SS for QFN and adjustable SS for HTSSOP
  • PFM operation and DEM 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

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RAA211820 Datasheet
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設計・開発

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RAA211820 iSim:PE Model
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RAA211630 Family Design Tool
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RTKA211820DE0000BU

RTKA211820DE0000BU

Evaluation
詳しくはこちら

RAA211820 Synchronous Buck Evaluation Board with 4.5V to 75V Input Range, 3.3V 2A Output (QFN version)

The RTKA211820DE0000BU board evaluates the RAA211820 (QFN version), a DC/DC synchronous step-down regulator with programmable switching frequency. The RAA211820...

主要ドキュメント:
RTKA211820DE0000BU Evaluation Board Manual
RTKA211820DE0010BU

RTKA211820DE0010BU

Evaluation
詳しくはこちら

RAA211820 Synchronous Buck Evaluation Board with 4.5V to 75V Input Range, 3.3V 2A Output (HTSSOP version)

The RTKA211820DE0010BU board evaluates the RAA211820 (HTSSOP version), a DC/DC synchronous step-down regulator with programmable switching frequency. The RAA211820...

主要ドキュメント:
RTKA211820DE0010BU Evaluation Board Manual

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製品選択

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    ご購入 / サンプル
    型名
    RAA211820GNP#HA0
    circleアクティブ
    memory
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    サンプル入手可能
    今すぐ購入する
    		2033 12月 QFN Reel 3 1.968 サンプルを入手,
    RAA211820GSP#HA0
    circleアクティブ
    memory
    spa
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    サンプル入手可能
    今すぐ購入する
    		2033 12月 TSSOP-EP Reel 3 サンプルを入手,
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    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
    ブログ 2023年3月17日