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 over all 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 (burst/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. It 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 over all 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
類型 | 標題 | 日期 | ||
---|---|---|---|---|
* | Data sheet | LM51772 55V 4-Switch Buck-Boost Controller with I2 C interface datasheet (Rev. B) | PDF | HTML | 2024年 6月 21日 |
Application note | Layout Optimization of 4-Switch Buck-Boost Converters | PDF | HTML | 2023年 9月 5日 |
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。
LM51772-QUICKSTART-CALC — LM51772 BuckBoost Quickstart Calculator Tool
支援產品和硬體
產品
AC/DC 和 DC/DC 控制器 (外部 FET)
硬體開發
開發板
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
- RoHS
- REACH
- 產品標記
- 鉛塗層/球物料
- MSL 等級/回焊峰值
- MTBF/FIT 估算值
- 材料內容
- 認證摘要
- 進行中持續性的可靠性監測
- 晶圓廠位置
- 組裝地點