LM5116
- New, similar products available:
- Emulated peak current mode
- Wide operating range up to 100 V
- Low I Q shutdown (< 10 µA)
- Drives standard or logic level MOSFETs
- Robust 3.5-A peak gate drive
- Free-run or synchronous operation to 1 MHz
- Optional diode emulation mode
- Programmable output from 1.215 V to 80 V
- Precision 1.5% voltage reference
- Programmable current limit
- Programmable soft start
- Programmable line undervoltage lockout
- Automatic switch to external bias supply
- HTSSOP-20 exposed pad
- Thermal shutdown
- Create a custom design using the LM5116 with the WEBENCH Power Designer
The LM5116 is a synchronous buck controller intended for step-down regulator applications from a high-voltage or widely varying input supply. The control method is based upon current mode control using an emulated current ramp. Current mode control provides inherent line feed-forward, cycle-by-cycle current limiting, and ease-of-loop compensation. The use of an emulated control ramp reduces noise sensitivity of the pulse-width modulation circuit, allowing reliable control of very small duty cycles necessary in high-input voltage applications.
The operating frequency is programmable from 50 kHz to 1 MHz. The LM5116 drives external high-side and low-side NMOS power switches with adaptive dead-time control. A user-selectable diode emulation mode enables discontinuous mode operation, for improved efficiency at light load conditions. A low quiescent current shutdown disables the controller and consumes less than 10 µA of total input current.
Additional features include a high-voltage bias regulator, automatic switch-over to external bias for improved efficiency, thermal shutdown, frequency synchronization, cycle-by-cycle current limit, and adjustable line undervoltage lockout. The device is available in a power enhanced HTSSOP-20 package featuring an exposed die attach pad to aid thermal dissipation.
New products (LM5148 and LM5149) offer reduced BOM cost, higher efficiency, and reduced design size among many other features.
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 | LM5116 Wide Range Synchronous Buck Controller datasheet (Rev. I) | PDF | HTML | 2023/11/3 | ||
| 類比設計期刊 | Control-Mode Quick Reference Guide (Rev. B) | PDF | HTML | 2023/8/29 | |||
| 白皮書 | Valuing wide VIN, low EMI synchronous buck circuits for cost-driven, demanding a (Rev. A) | 2019/4/10 | ||||
| 應用說明 | Understanding Inverting Buck-Boost Power Stages in Switch Mode Power Supplies (Rev. B) | 2019/3/12 | ||||
| 白皮書 | Overcoming Challenges in Designing Step-Dwn Reg Apps w/40V Input Voltage (Rev. A) | 2018/7/3 | ||||
| 選擇指南 | DC/DC Buck Controller Solutions Selection Guide | 2018/2/6 | ||||
| 類比設計期刊 | Reduce buck-converter EMI and voltage stress by minimizing inductive parasitics | 2016/7/21 | ||||
| 白皮書 | Choosing the Right Fixed Frequency Buck Regulator Control Strategy | 2015/10/2 | ||||
| 白皮書 | Choosing the Right Fixed Frequency Buck Regulator Control Strategy (PPT) | 2015/10/2 | ||||
| 白皮書 | Wide VIN power management ICs simplify white paper (Rev. A) | 2013/9/19 | ||||
| 應用說明 | Minimizing FET Losses For a High Input Rail Buck Converter (Rev. A) | 2013/4/23 |
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)。
LM5116-12EVAL — LM5116-12 評估板
The LM5116-12 evaluation board is designed to provide the design engineer with a fully functional power converter based on Emulated Current Mode Control to evaluate the LM5116 controller IC. The evaluation board provides a 12V output with a 5A current capability. The operating input voltage ranges (...)
LM5116-5116WG-25116DESIGN-CALC — LM(2)5116/WG 快速入門元件計算機
歡迎使用 LM5116、LM5116WG 和 LM25116 快速入門設計工具。此獨立工具會協助電源供應器工程師採用基於本產品系列同步降壓穩壓器的 DC/DC 降壓穩壓器進行設計。因此，使用者可以迅速達到最佳化的設計，以符合應用需求。
PMP11257 — 4 級 PoE 同步降壓轉換器 (12V/2A) 參考設計
PMP7282 — 具有 97% 效率的 35V 至 60V 輸入和 600W 輸出雙相降壓轉換器參考設計
此 600W 寬電壓輸入雙相電源轉換器使用兩個 180 度異相的模擬電流模式控制器，將輸入和輸出漣波電流降到最低。相較於傳統的隔離式電源轉換器，此同步降壓架構可在更高的效率層級提供更小的尺寸與更低的 BOM 成本，在多種操作條件下皆可達 97% 以上。
PMP9581_REVB — 具有耦合電感器的 40W 同步 ZETA 轉換器參考設計
這款耦合電感器，4A 時電壓為 13.2V，同步 ZETA 轉換器，在全負載時可實現效率高於 95%。Vin 大於 10V 時可提供 5A 輸出。其採用所有表面安裝元件，可維持溫度上升低，並能夠承受高峰值負載瞬態。有關此帶有獨立電感器的設計，請參閱 PMP9581 REVC。
PMP9581_REVC — 具有兩個電感器的 40W 同步 ZETA 轉換器參考設計
這款雙電感器，4A 時電壓為 13.2V，同步 ZETA 轉換器，在全負載時可實現效率高於 93%。Vin 大於 10V 時可提供 5A 輸出。其採用所有表面安裝元件，可維持溫度上升低，並能夠承受高峰值負載瞬態。 有關此帶有耦合電感器的設計，請參閱 PMP9581 REVB。
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| HTSSOP (PWP) | 20 | 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。