The LM25019 is a 48-V, 100-mA synchronous step-down regulator with integrated high-side and low-side MOSFETs. The constant on-time (COT) control scheme employed in the LM25019 requires no loop compensation, provides excellent transient response, and enables very high step-down ratios. The on-time varies inversely with the input voltage resulting in nearly constant frequency over the input voltage range. A high-voltage start-up regulator provides bias power for internal operation of the IC and for integrated gate drivers.
A peak current limit circuit protects against overload conditions. The undervoltage lockout (UVLO) circuit allows the input undervoltage threshold and hysteresis to be independently programmed. Other protection features include thermal shutdown and bias supply undervoltage lockout.
The LM25019 is available in 8-pin WSON and 8-pin SO PowerPAD plastic packages.
| 重要文件 | 類型 | 標題 | 格式選項 | 日期 |
|---|---|---|---|---|
| * | Data sheet | LM25019 48-V, 100-mA Constant On-Time Synchronous Buck / Fly-Buck™ Regulator datasheet (Rev. F) | PDF | HTML | 2021年 5月 24日 |
| Product overview | Isolated Power Topologies for PLC I/O Modules and Other Low-Power Applications (Rev. A) | PDF | HTML | 2024年 8月 20日 | |
| Selection guide | Buck Converter Quick Reference Guide (Rev. B) | 2021年 4月 8日 | ||
| White paper | Valuing wide VIN, low EMI synchronous buck circuits for cost-driven, demanding a (Rev. A) | 2019年 4月 10日 | ||
| Technical article | Create a Fly-Buck™ converter in WEBENCH® Power Designer | PDF | HTML | 2015年 10月 9日 | |
| Analog Design Journal | Fly-Buck(TM) converter provides EMC and isolation in PLC applications | 2015年 1月 29日 | ||
| Application note | AN-2292 Designing an Isolated Buck (Fly-Buck) Converter (Rev. C) | 2014年 12月 17日 | ||
| Product overview | Fly-Buck™ Solution | 2013年 11月 19日 | ||
| User guide | LM5019 Buck Evaluation Board (Rev. A) | 2013年 4月 30日 | ||
| EVM User's guide | LM25019 Buck Evaluation Board | 2013年 4月 3日 |
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)。
This tool helps a power supply engineer to select the right isolated DC-DC topology based on the specifications. Depending on the topology chosen, the calculator also recommends the right IC for the design.
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| HSOIC (DDA) | 8 | Ultra Librarian |
| WSON (NGU) | 8 | Ultra Librarian |
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。