LM51772
- Input range from 0V (V(BIAS) ≥ 3.5V) to 55V
- Output voltage 1V to 55V
- Dynamical Vo
programming via I2C from:
- 3.3V up to 48V in 20mV monotonous steps
- 1V up to 24V in 10mV monotonous steps
- Peak current regulation control
- Small voltage transition ripple overall operating modes
- Dynamic output
voltage tracking (digital PWM tracking input, analog tracking input)
- Via I2C interface programming
- Shut down quiescent current 3µA
- Operating quiescent current 60µA
- DRV pin for external FET control
- Operation mode selection for high efficiency in
light load and high load conditions:
- Power save mode (Single Pulse/µSleep)
- Automatic/programmable conduction mode
- Integrated high voltage supply LDO
- Auxiliary high voltage LDO/reference
- Integrated full-bridge gate drive
- 2A peak current capability
- Bootstrap over and under-voltage protection
- Integrated boot-strap diode
- Fixed frequency independent from operating mode
(boost, buck-boost, buck)
- Forced PWM mode selectable
- Switching frequency from 100kHz to 2.2MHz
- External clock synchronization and clock output
- Spread spectrum operation selectable
- Average input or output current sensor
- Programmable from 0.5A (5mV) to 7A (70mV) in 50mA (500µV) steps
- ISET pin selectable
- I2C Interface readout of monitoring features
-
Create a custom design using the LM51772 with the WEBENCH® Power Designer
The LM51772 is a four switch buck-boost controller that 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 very high efficiency over the complete operation range of the output. The LM51772 runs at a fixed switching frequency, which can be set via the RT/SYNC pin. The switching frequency remains constant during buck, boost and buck-boost operation in forced PWM. The external compensation pin allows very fast transient response for different applications. The device maintains small mode transition ripple overall operating modes. The output voltage and device configurations can be dynamically programmed via the integrated I2C interface. The integrated and optional high-side current sensor features an accurate output or input current limitation. The average current limit of the LM51772 is also configurable through the I2C interface.
技術文件
| 重要文件 | 類型 | 標題 | 格式選項 | 下載最新的英文版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 資料表 | LM51772 55V 4-Switch Buck-Boost Controller with I2 C interface datasheet (Rev. D) | PDF | HTML | 2025/9/3 | ||
| Application brief | Implementing Reverse Current Operation in the LM51772 Using MODE Function | PDF | HTML | 2026/2/20 | |||
| Application brief | Using the DRV1 Pin on LM51772 and LM251772 | PDF | HTML | 2025/7/29 | |||
| 應用說明 | Battery or Capacitor Backup Operation with the LM51772 | 2025/7/9 | ||||
| Application brief | Current Monitoring with Positive and Negative Currents on LM5177x Devices (Rev. A) | PDF | HTML | 2024/11/25 | |||
| 應用說明 | Parallel Operation of the Buck-Boost Converters Using LM51772 Buck-Boost Controller | PDF | HTML | 2024/8/27 | |||
| 應用說明 | Layout Optimization of 4-Switch Buck-Boost Converters | PDF | HTML | 2023/9/5 |
設計與開發
如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。
LM51772EVM-HP — LM51772 評估模組
LM51772EVM-HP 展示使用 LM51772 wide-VIN 降壓升壓控制器的靈活高功率降壓升壓設計。評估模組設定為在 9V 至 48V 輸入電壓範圍內運作，並且提供最高 5A 負載電流的穩壓 20V 輸出。
USB2ANY — USB2ANY 介面轉接器
USB2ANY 介面轉接器是一種工具，可讓電腦透過 USB 連線控制評估模組 (EVM)。USB2ANY 支援多種常用的通訊協定介面，並提供 3.3V 與 5V 的電源供應器。
LM51772-QUICKSTART-CALC — LM51772 BuckBoost Quickstart Calculator Tool
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| VQFN (RHA) | 40 | Ultra Librarian |
訂購與品質
建議產品可能具有與此 TI 產品相關的參數、評估模組或參考設計。