LM51770
- Wide input range from 3.5V to 78V (85V absolute maximum)
- Minimum 2.8V when V(BIAS) > 3.5V
- Output voltage from 3.3V to 78V
- Low shutdown IQ of 3µA
- Low operating IQ of 60µA
- 3% reverse current limit accuracy for precise charging currents
- Average input and output current monitor or limiter
- Dynamic output voltage tracking for PWM or analog input signals
- Power save mode (PSM) selectable for high light load efficiency
- Two integrated high-voltage supply LDOs with automatic selection
- Fixed frequency across all operating modes (boost, buck-boost, buck)
- Forced PWM mode selectable
- Switching up to 1.8MHz for small solution and component size
- External clock synchronization
- Spread spectrum operation selectable
- Adjustable undervoltage protection
- Hiccup overcurrent and short protection
The LM51770 is a four switch buck-boost controller. The device provides a regulated output voltage if the input voltage is higher, equal, or lower than the adjusted output voltage. In power save mode, the device supports high efficiency with low output loads due to its low quiescence currents. In power save mode, the device supports high efficiency close to 99% efficiency over the full range of the output currentThe LM51770 runs at a fixed switching frequency, which can be set through the RT or SYNC pin. The switching frequency remains the same during buck, boost, and buck-boost operation. The integrated and optional average current monitor can help monitor and limit input and output current of the LM51770. This feature also supports charging backup power elements, like batteries or capacitors, with constant current (CC) and constant voltage (CV).
技術資料
設計および開発
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LM5177EVM-HP — LM5177 4 個のスイッチ搭載、昇降圧コントローラの評価基板
パッケージ | ピン数 | CAD シンボル、フットプリント、および 3D モデル |
---|---|---|
HTSSOP (DCP) | 38 | Ultra Librarian |
購入と品質
- RoHS
- REACH
- デバイスのマーキング
- リード端子の仕上げ / ボールの原材料
- MSL 定格 / ピーク リフロー
- MTBF/FIT 推定値
- 使用原材料
- 認定試験結果
- 継続的な信頼性モニタ試験結果
- ファブの拠点
- 組み立てを実施した拠点