TPS54334
- Two 128mΩ/84mΩ MOSFETs for 3A Continuous
Output Current - Power Good
- Low 2 µA Shutdown Quiescent Current
- 0.8 V Internal Voltage Reference with ±1.5%
Accuracy Over Temperature - Fixed-Frequency Current Mode Control
- Pulse Skipping Boosts Efficiency at Light Loads
- Overcurrent Protection for Both MOSFETs with
Hiccup Mode for Severe Fault Conditions - Thermal and Overvoltage Transient Protection
- Available in Easy-to-Use 8-Pin SOIC
PowerPAD™ and 10-Pin SON - Monotonic Start-Up into Pre-biased Outputs
The TPS54334 is a 28-V, 3-A, low quiescent supply current (IQ), synchronous monolithic buck converter with integrated MOSFETs.
The TPS54334 enables small designs by integrating the MOSFETs and implementing current mode control to reduce external component count.
Efficiency is maximized through the integrated 128mΩ/84mΩ MOSFETs, low quiescent supply current and pulse skipping at light loads. Using the enable pin, shutdown supply current is reduced to 2 µA by entering a shutdown mode.
The TPS54334 provides accurate regulation for a variety of loads with an accurate 1.5% voltage reference over temperature.
Cycle by cycle current limiting on the high-side fet protects the TPS54334 in overload situations and is enhanced by a low-side sourcing current limit which prevents current runaway. There is also a low-side sinking current limit which turns off the low-side MOSFET to prevent excessive reverse current. Hiccup protection will be triggered if the overcurrent condition has persisted for longer than the preset time. Thermal hiccup protection disables the part when die temperature exceeds thermal shutdown temperature and enables the part again after the built-in thermal hiccup time.
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 | TPS54334 4.2-V to 28-V Input Voltage, 3-A Output Current Synchronous Step-Down Voltage Converter datasheet (Rev. A) | PDF | HTML | 2016/2/10 | ||
| 應用說明 | Measure Power Stage Gain and Slope Compensation in PCM (Peak Current Mode) BUCK (Rev. A) | PDF | HTML | 2019/4/1 | |||
| 應用說明 | How to Estimate Overshoot and Undershoot of Load Transients of a DC/DC Regulator | 2017/12/20 | ||||
| 應用說明 | Using TPS54335A to Create an Inverting Power Supply (Rev. A) | 2017/7/19 |
設計與開發
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TPS54334EVM-722 — TPS54334EVM-722 3-A 穩壓器評估模組
TPS54334 是一款配備整合式 MOSFET 的 28V、3A、低靜態供應電流 (IQ)、同步單體降壓轉換器。TPS54334 整合 MOSFET 並實作電流模式控制來減少外部元件數量，藉此縮小設計尺寸。
透過整合式 128mΩ/84mΩ MOSFET、低靜態供應電流及低負載下的脈衝略過技術，盡可能提升效率。啟用致能接腳後可進入關機模式，使關機供應電流降至 2μA
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| VSON (DRC) | 10 | Ultra Librarian |
| HSOIC (DDA) | 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。