LMR54406
- Functional Safety-Capable
- Configured for rugged industrial applications
- 4V to 36V input voltage range
- Withstands up to 50V short VIN transient
- 0.6A/1A continuous output current
- 60ns minimum switching on time
- 1.1MHz fixed switching frequency
- –40°C to 150°C junction temperature range
- 98% maximum duty cycle
- Monotonic start-up with prebiased output
- Short-circuit protection with hiccup mode
- Precision enable
- ±1% tolerance voltage reference
- Small design size and ease of use
- Integrated synchronous rectification
- Internal compensation for ease of use
- SOT-23 package
- Pin-to-pin compatible with the LMR14010A, LMR50410, and TPS560430
- Various options in pin-to-pin compatible package
- PFM and forced PWM (FPWM) options
The LMR544xx is a wide-VIN, easy-to-use synchronous buck converter capable of driving up to 1A and 0.6A load current. With a wide input range of 4V to 36V, the device is designed for a wide range of industrial applications for power conditioning from an unregulated source.
The LMR544xx operates at 1.1MHz switching frequency to support use of relatively small inductors for an optimized design size. The devices have a PFM version to realize high efficiency at light load and a FPWM version to achieve constant frequency and small output voltage ripple over the full load range. Soft-start and compensation circuits are implemented internally, which allow the device to be used with minimal external components.
The device has built-in protection features, such as cycle-by-cycle current limit, hiccup mode short-circuit protection, and thermal shutdown in case of excessive power dissipation.
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 | LMR544xx SIMPLE SWITCHER Power Converter 4V to 45V, 0.6A/1A Buck Converter in a SOT-23 Package datasheet (Rev. E) | PDF | HTML | 2026/1/2 | ||
| 類比設計期刊 | 如何使用適應性電源將 PLC 輸出功耗減 半 | PDF | HTML | PDF | HTML | 2026/4/24 | ||
| 功能安全資訊 | LMR544xx Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA | PDF | HTML | 2021/10/15 |
設計與開發
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LMR54410EVM — 具有 4-V 至 36-V、1-A 同步降壓轉換器的 LMR54410 評估模組
LMR54410EVM 是完全組裝且經過測試的電路，可用於評估 LMR54410 降壓轉換器。此電路板具有跨接器連接器，可用於觸發針腳，並可提供上拉裝置至 VIN 或外部高電平啟用。基板將設為 3.3-V-Vout。基板也具備用於環路量測的 AC 訊號注入端子。
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| SOT-23 (DBV) | 6 | 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。