LM27222
- Adaptive Shoot-through Protection
- 10ns Dead Time
- 8ns Propagation Delay
- 30ns Minimum On-time
- 0.4Ω Pull-down and 0.9Ω Pull-up Drivers
- 4.5A Peak Driving Current
- MOSFET Tolerant Design
- 5µA Quiescent Current
- 30V Maximum Input Voltage in Buck Configuration
- 4V to 6.85V Operating Voltage
- SOIC-8 and WSON Packages
All trademarks are the property of their respective owners.
The LM27222 is a dual N-channel MOSFET driver designed to drive MOSFETs in push-pull configurations as typically used in synchronous buck regulators. The LM27222 takes the PWM output from a controller and provides the proper timing and drive levels to the power stage MOSFETs. Adaptive shoot-through protection prevents damaging and efficiency reducing shoot-through currents, thus ensuring a robust design capable of being used with nearly any MOSFET. The adaptive shoot-through protection circuitry also reduces the dead time down to as low as 10ns, ensuring the highest operating efficiency. The peak sourcing and sinking current for each driver of the LM27222 is about 3A and 4.5Amps respectively with a Vgs of 5V. System performance is also enhanced by keeping propagation delays down to 8ns. Efficiency is once again improved at all load currents by supporting synchronous, non-synchronous, and diode emulation modes through the LEN pin. The minimum output pulse width realized at the output of the MOSFETs is as low as 30ns. This enables high operating frequencies at very high conversion ratios in buck regulator designs. To support low power states in notebook systems, the LM27222 draws only 5µA from the 5V rail when the IN and LEN inputs are low or floating.
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 | LM27222 High-Speed 4.5A Synchronous MOSFET Driver datasheet (Rev. B) | 2013/3/7 | |||
| 應用說明 | Using Half-Bridge Gate Driver to Achieve 100% Duty Cycle for High Side FET | PDF | HTML | 2024/3/25 | |||
| 應用說明 | Bootstrap Circuitry Selection for Half Bridge Configurations (Rev. A) | PDF | HTML | 2023/9/8 | |||
| 應用說明 | Comparative Analysis of Two Different Methods for Gate-Drive Current Boosting (Rev. A) | PDF | HTML | 2022/2/17 | |||
| Application brief | External Gate Resistor Selection Guide (Rev. A) | 2020/2/28 | ||||
| Application brief | Understanding Peak IOH and IOL Currents (Rev. A) | 2020/2/28 | ||||
| 更多文件說明 | Fundamentals of MOSFET and IGBT Gate Driver Circuits (Replaces SLUP169) (Rev. A) | 2018/10/29 |
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)。
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| SOIC (D) | 8 | Ultra Librarian |
| WSON (NGT) | 8 | 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。