TPS627451
- Input Voltage Range VIN from 3.3 V to 10 V
- Typical 400 nA Quiescent Current
- Up to 90% efficiency with load currents >15 µA
- Up to 300 mA Output Current
- RF Friendly DCS-Control™
- Low Output Ripple Voltage
- 16 Selectable Output Voltages from
- 1.8 V to 3.3 V (TPS62745)
- 1.3 V to 2.8 V (TPS627451)
- Integrated input voltage switch
- Integrated Discharge Function at VOUT
- Open Drain Power Good Output
- Operates with a Tiny 3.3 µH or 4.7 µH Inductor
- Small 3 mm × 2 mm WSON Package
The TPS62745 is a high efficiency ultra low power synchronous step down converter optimized for low power wireless applications. It provides a regulated output voltage consuming only 400-nA quiescent current. The device operates from two rechargeable Li-Ion batteries, Li-primary battery chemistries such as Li-SOCl2, Li-SO2, Li-MnO2 or four to six cell alkaline batteries. The input voltage range up to 10 V allows also operation from a USB port and thin-film solar modules. The output voltage is set with four VSEL pins between 1.8 V and 3.3 V for TPS62745 or 1.3 V and 2.8 V for TPS627451. TPS62745 features low output ripple voltage and low noise with a small output capacitor. An internal input voltage switch controlled by pin EN_VIN_SW connects the supply voltage to pin VIN_SW. The switch is intended to be used for an external voltage divider, scaling down the input voltage for an external ADC. The switch is automatically opened when the supply voltage is below the undervoltage lockout threshold. The TPS62745 is available in a small 12 pin 3 mm × 2 mm WSON package.
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 | TPS62745 Dual-cell Ultra Low IQ Step Down Converter for Low Power Wireless Applications datasheet (Rev. A) | PDF | HTML | 2015/6/10 | ||
| 白皮書 | Extending Battery Life in Smart E-Locks (Rev. A) | 2020/6/4 | ||||
| 白皮書 | Benefits of a Resistor-to-Digital Converter in Ultra-Low Power Supplies | 2019/10/14 | ||||
| 類比設計期刊 | Methods of output-voltage adjustment for DC/DC converters | 2019/6/14 | ||||
| 類比設計期刊 | Understanding 100% mode in low-power DC/DC converters | 2018/6/22 | ||||
| 類比設計期刊 | Achieving a clean startup by using a DC/DC converter with a precise enable-pin threshold | 2017/10/24 | ||||
| 類比設計期刊 | Testing tips for applying external power to supply outputs without an input voltage | 2016/10/24 | ||||
| 類比設計期刊 | Understanding frequency variation in the DCS-Control(TM) topology | 2015/10/30 |
設計與開發
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TPS62745EVM-622 — 超低 Iq、廣泛 VIN 降壓轉換器評估模組
TPS62745EVM-622 旨在協助使用者輕鬆評估和測試 TPS62745 的運作和功能。EVM 將 3.3V 至 10V 輸入電壓轉換為穩壓輸出電壓，該電壓可設定在 1.8V 和 3.3V 之間，最高可達 300mA。TPS62745 也包含整合式輸入電壓開關，可將接腳 VIN_SW 和輸入端連接或中斷。TPS627450 具有 500nA 的超低靜態電流。
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| WSON (DSS) | 12 | 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。