概要
説明
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.
特長
- 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
製品比較
アプリケーション
設計・開発
ソフトウェア／ツール
ソフトウェア／ツール
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| 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。
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Simulator | ルネサス |
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ボード＆キット
Evaluation
RTKA211450DE0000BU
アクティブ
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 supports a wide input voltage range (from 4.5V to 42V) and adjustable output voltage. It delivers up to continuous 5A output current...
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Evaluation
RTKA211450DE0010BU
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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 supports a wide input voltage range (from 4.5V to 42V) and adjustable output voltage. It delivers up to continuous 5A output current...
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モデル
ECADモデル
SamacSysの回路図シンボル、PCBフットプリント、および3D CADモデルは、製品オプションテーブルのCADモデルリンクをクリックすることで参照できます。シンボルまたはモデルが対応していない場合は、SamacSysに直接リクエスト可能です。
製品選択
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ビデオ&トレーニング
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Video List
ニュース＆ブログ
ブログ
2023年5月8日
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