概要
説明
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.
特長
- 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
製品比較
アプリケーション
設計・開発
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ボード＆キット
Evaluation
RTKA211820DE0000BU
アクティブ
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 supports a wide input voltage range (from 4.5V to 75V) and adjustable output voltage. It delivers up to continuous 2A output current...
Recommended Documents:
Evaluation
RTKA211820DE0010BU
アクティブ
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 supports a wide input voltage range (from 4.5V to 75V) and adjustable output voltage. It delivers up to continuous 2A output current...
Recommended Documents:
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
適用されたフィルター
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
