TPS62148
- Output voltage accuracy ± 1% over specified TJ range (PWM mode)
- Input voltage range: 3 V to 17 V
- Quiescent current 18-µA typical
- Output voltage from 0.8 V to 12 V
- Adjustable soft start
- Forced PWM or PWM/PFM operation
- Switching frequency of 1.25 MHz or 2.5 MHz in forced PWM
- Precise ENABLE input allows
- User-defined undervoltage lockout
- Exact sequencing
- 100% duty cycle mode
- Automatic efficiency enhancement AEE
- DCS-Control topology
- Active output discharge (TPS62148)
- HICCUP overcurrent protection (TPS62147)
- Power-good output
- Available in 2-mm × 3-mm VQFN package
The TPS62147 and TPS62148 are high efficiency and easy-to-use synchronous step-down DC/DC converters, based on the DCS-Control Topology. The wide input voltage range of 3-V to 17-V make the devices suitable for multi-cell Li-Ion as well as 12-V intermediate supply rails. The devices provide 2-A continuous output current. The devices automatically enter Power Save Mode at light loads to maintain high efficiency across the whole load range. With that, the devices are well suited for applications that require connected standby performance, like industrial PC and video surveillance. With the MODE pin set to low, the switching frequency is adapted automatically based on the output current and also on input and output voltage. This technique is called Automatic Efficiency Enhancement (AEE) and maintains high conversion efficiency over the whole operation range. TPS62147, TPS62148 provide a 1% output voltage accuracy in PWM mode and therefore enable the design of a power supply with high output voltage accuracy. The FSEL pin allows to set a switching frequency in forced PWM mode of 1.25 MHz or 2.5 MHz, respectively.
The typical quiescent current is 18 µA. In shutdown mode, the current is typically 1 µA.
The devices are available as an adjustable version, packaged in a 3-mm × 2-mm VQFN package.
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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 | TPS62147, TPS62148 High-Accuracy, 3-V to 17-V, 2-A Step-Down Converter with DCS-Control datasheet (Rev. B) | PDF | HTML | 2023/2/2 | ||
| 應用說明 | Point-of-Load Solutions for Network Interface Cards (NIC) | PDF | HTML | 2021/9/8 | |||
| 應用說明 | Step-Dwn (Buck) Convrtr Pwer Solutions for Programmable Logic Controller Systems (Rev. A) | PDF | HTML | 2021/7/26 | |||
| 選擇指南 | Buck Converter Quick Reference Guide (Rev. B) | 2021/4/8 | ||||
| 類比設計期刊 | Methods of output-voltage adjustment for DC/DC converters | 2019/6/14 | ||||
| 應用說明 | Solve Point-of-Load Power Design Challenges: Single Board Computer Applications | 2018/8/24 | ||||
| 類比設計期刊 | Understanding 100% mode in low-power DC/DC converters | 2018/6/22 | ||||
| 技術文章 | Output accuracy varies with temperature – 1% is not always 1% | PDF | HTML | 2018/5/2 |
設計與開發
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TPS62148EVM-034 — 具有 fSEL 功能的 17-V 輸入、2-A 輸出、降壓轉換器評估模組
TPS62148EVM-034 的設計旨在幫助使用者輕鬆評估及測試 TPS62148 DC/DC 轉換器的運作及功能。EVM 可在高達 2A 的輸出電流下，將 3V 至 17V 的輸入電壓轉換為 3.3V 穩壓輸出電壓。TPS62148 以 1MHz 的額定切換頻率運作，並採用小型 2.0 x 3.0mm² 的 QFN 封裝。
SLVC780 — Design Tool for Output Voltage Adjustment Using a DAC
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| VQFN-HR (RGX) | 11 | 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。