現在提供此產品的更新版本
功能相同，但針腳輸出與所比較的裝置不同。
TPS7A45
- Optimized for Fast Transient Response
- Output Current: 1.5 A
- High Output Voltage Accuracy: 1% at 25°C
- Dropout Voltage: 300 mV
- Low Noise: 35 µVRMS (10 Hz to 100 kHz)
- High Ripple Rejection: 68 dB at 1 kHz
- 1-mA Quiescent Current
- No Protection Diodes Needed
- Controlled Quiescent Current in Dropout
- Fixed Output Voltages: 1.5 V, 1.8 V, 2.5 V, 3.3 V
- Adjustable Output from 1.21 V to 20 V (TPS7A4501 Only)
- Less Than 1-µA Quiescent Current in Shutdown
- Stable With 10-µF Ceramic Output Capacitor
- Reverse-Battery Protection
- Reverse Current Protection
The TPS7A45xx devices are low-dropout (LDO) regulators optimized for fast transient response. The device can supply 1.5 A of output current with a dropout voltage of 300 mV. Operating quiescent current is 1 mA, dropping to less than 1 µA in shutdown. Quiescent current is well controlled; it does not rise in dropout as with many other regulators. In addition to fast transient response, the TPS7A45xx regulators have very-low output noise, which makes them ideal for sensitive RF supply applications.
Output voltage range is from 1.21 to 20 V. The TPS7A45xx regulators are stable with output capacitance as low as 10 µF. Small ceramic capacitors can be used without the necessary addition of ESR as is common with other regulators. Internal protection circuitry includes reverse-battery protection, current limiting, thermal limiting, and reverse-current protection. The devices are available in fixed output voltages of 1.5 V, 1.8 V, 2.5 V, 3.3 V, and as an adjustable device with a 1.21-V reference voltage.
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 | TPS7A45xx Low-Noise Fast-Transient-Response 1.5-A Low-Dropout Voltage Regulators datasheet (Rev. F) | PDF | HTML | 2015/11/18 | ||
| 應用說明 | LDO Noise Demystified (Rev. B) | PDF | HTML | 2020/8/18 | |||
| 應用說明 | Using Thermal Calculation Tools for Analog Components (Rev. A) | 2019/8/30 | ||||
| 應用說明 | A Topical Index of TI LDO Application Notes (Rev. F) | 2019/6/27 | ||||
| 應用說明 | LDO PSRR Measurement Simplified (Rev. A) | PDF | HTML | 2017/8/9 |
設計與開發
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TPS7A4501EVM-385 — TPS7A4501EVM-385 評估模組
The TPS7A4501EVM-385 facilitates evaluation of the TPS7A4501 1.5A Low-Noise, Fast-Transient-Response Low-Dropout Regulator. The EVM allows the user to apply different input voltage levels (2.5V to 20V) and different loads (0 to 1.5A) and check the regulated output voltage for stability.
PARALLEL-LDO-CALC — Parallel low-dropout (LDO) calculator
並聯低壓差 (LDO) 計算器是以 Microsoft® Excel® 為基礎的工具，可為使用鎮流器電阻器的並聯 LDO 穩壓器提供最壞情況分析。此工具可幫助使用者判斷所需的並聯 LDO 穩壓器最小數量，以及適合系統要求集的最佳鎮流器電阻。
在並聯應用中使用的常用 LDO 穩壓器的產品規格書資訊會預先填入計算機中。使用者可根據自己的系統需求，評估最符合其系統需求的 LDO 穩壓器裝置。
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| SOT-223 (DCQ) | 6 | Ultra Librarian |
| TO-263 (KTT) | 5 | 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。