TPS65261
- Operating input supply voltage range (4.5 V to 18 V)
- Feedback reference voltage 0.6 V±1%
- Maximum continuous output current 3 A/2 A/2 A
- Adjustable clock frequency from 250 kHz to 2 MHz
- dedicated enable and soft start pins for each buck
- Automatic power-up, power-down sequence
- Pulse Skipping Mode (PSM) at Light Load (TPS65261 only)
- Output voltage power-good indicator
- Input voltage power failure indicator
- Thermal overloading protection
The TPS65261, TPS65261-1 is a monolithic triple synchronous step-down (buck) converter with 3-A/2-A/2-A output currents. A wide 4.5-V to 18-V input supply voltage range encompasses the most intermediate bus voltages operating off 5-V, 9-V, 12-V or 15-V power bus. The converter, with constant frequency peak current mode, is designed to simplify its application while giving designers options to optimize the system according to targeted applications. The switching frequency of the converters can be adjusted from 250 kHz to 2 MHz with an external resistor. The 180° out-of-phase operation between Buck1 and Buck2, 3 (Buck2 and 3 run in phase) minimizes the input filter requirements.
The TPS65261, TPS65261-1 features an automatic power sequence with connecting MODE pin to V7V and configuring EN1/2/3 pins. The device also features an open drain RESET signal to monitor power down.
At light load, the TPS65261 automatically operates in pulse skipping mode (PSM) and the TPS65261-1 operates in force continuous current mode (FCC). PSM mode provides high efficiency by reducing switching losses at light loads and FCC mode reduces noise susceptibility and RF interference.
The device features overvoltage protection, overcurrent and short-circuit protection and over-temperature protection. A power-good pin asserts when any output voltages are out of regulation.
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 | TPS6526x 4.5-V to 18-V Input Voltage, 3-A/2-A/2-A Output Current Triple Synchronous Step-Down Converter datasheet (Rev. C) | PDF | HTML | 2023/5/10 | ||
| 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 | TPS65250/1/2/3 LAYOUT GUIDE | 2013/1/15 |
設計與開發
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TPS65261EVM-650 — TPS65261EVM 評估模組
TPS65261EVM-650 評估模組 (EVM) 是一個已完成組裝且經過測試的電路，用於評估 TPS65261。此 EVM 包含輸入和輸出連接器以及控制跨接器，可輕鬆評估裝置功能。
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| VQFN (RHB) | 32 | 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。