概要

The RAA211450 is a DC/DC synchronous step-down (Buck) regulator that supports a 4.5V to 42V input voltage range and adjustable output voltage. It can deliver up to continuous 5A of continuous output current with premium load and line regulation performance.

The RAA211450 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 RAA211450 provides useful functions such as internal or programmable soft-start and power good indicator. For safe operation, the RAA211450 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.

RAA211450 Block Diagram
RAA211450 Typical Application Circuit
RAA211450 20 Ld QFN Pin Assignment
RAA211450 16 Ld HTSSOP Pin Assignment
RAA211450 Block Diagram
RAA211450 Typical Application Circuit
RAA211450 20 Ld QFN Pin Assignment
RAA211450 16 Ld HTSSOP Pin Assignment
  • Wide Vin operating range from 4.5V to 42V
  • Adjustable Vout from 0.8V to ~90% of Vin
  • Up to 5A 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 42V distributed power supplies & general purposes POL
  • Telecommunication base station power supplies
  • Power tools
  • Surveillance
  • Portable mobility devices
  • Industrial power systems

ドキュメント

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RAA211450 Datasheet
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RAA211630 Family Design Tool
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RTKA211450DE0000BU

RTKA211450DE0000BU

Evaluation
詳しくはこちら

RAA211450 Synchronous Buck Evaluation Board with 4.5V to 42V Input Range, 3.3V 5A Output (QFN version)

The RTKA211450DE0000BU board evaluates the RAA211450 (QFN version), a DC/DC synchronous step-down regulator with programmable switching frequency. The RAA211450...

主要ドキュメント:
RTKA211450DE0000BU Evaluation Board Manual
RTKA211450DE0010BU

RTKA211450DE0010BU

Evaluation
詳しくはこちら

RAA211450 Synchronous Buck Evaluation Board with 4.5V to 42V Input Range, 3.3V 5A Output (HTSSOP version)

The RTKA211450DE0010BU board evaluates the RAA211450 (HTSSOP version), a DC/DC synchronous step-down regulator with programmable switching frequency. The RAA211450...

主要ドキュメント:
RTKA211450DE0010BU Evaluation Board Manual
CN032-GATEWAYREFZ Evaluation Board

CN032-GATEWAYREFZ

Evaluation
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RZ/N2L Remote I/O Solution Kitは、フォトカプラ絶縁付きデジタルIOインタフェースとアナログ入力を装備し、EtherCATやEtherNet/IPなどの産業用ネットワーク通信に対応したRZ/N2L Gateway Solution Boardを使用して...

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    RAA211450GNP#HA0
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    		2033 12月 QFN Reel 3 1.968 サンプルを入手,
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    		2033 12月 TSSOP-EP Reel 3 1.968 サンプルを入手,
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    ビデオ&トレーニング

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    ブログ 2023年5月8日