TPS51225
- Input Voltage Range: 5.5 V to 24 V
- Output Voltages: 5 V and 3.3 V (Adjustable Range ±10%)
- Built-in, 100-mA, 5-V and 3.3-V LDOs
- Clock Output for Charge-Pump
- ±1% Reference Accuracy
- Adaptive On-time D-CAP Mode Control Architecture with 300kHz/355kHz Frequency Setting
- Auto-skip Light Load Operation (TPS51225/C)
- OOA Light Load Operation (TPS51225B)
- Internal 0.8-ms Voltage Servo Soft-Start
- Low-Side RDS(on) Current Sensing Scheme with 4500 ppm/°C Temperature Coefficient
- Built-in Output Discharge Function
- Separate Enable Input for Switchers (TPS51225/B/C)
- Dedicated OC Setting Terminals
- Power Good Indicator
- OVP/UVP/OCP Protection
- Non-latch UVLO/OTP Protection
- 20-Pin, 3 mm × 3 mm, QFN (RUK)
The TPS51225/B/C is a cost-effective, dual-synchronous buck controller targeted for notebook system-power supply solutions. It provides 5-V and 3.3-V LDOs and requires few external components. The 260-kHz VCLK output can be used to drive an external charge pump, generating gate drive voltage for the load switches without reducing the main converter efficiency. The TPS51225/B/C supports high efficiency, fast transient response and provides a combined power-good signal. Adaptive on-time, D-CAP™ control provides convenient and efficient operation. The device operates with supply input voltage ranging from 5.5 V to 24 V and supports output voltages of 5.0 V and 3.3 V. The TPS51225/B/C is available in a 20-pin, 3 mm × 3 mm, QFN package and is specified from –40°C to 85°C.
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 | Dual Synchronous Step-Down Controller with 5-V and 3.3-V LDOs datasheet (Rev. B) | 2012/9/9 | |||
| 應用說明 | Mosfet Driver Circuit Design Guide for TPS512xx (Rev. A) | 2019/4/1 | ||||
| 應用說明 | Understanding Dead-time Based On TPS51225/275/285 | 2018/8/22 | ||||
| 選擇指南 | Power Management Guide 2018 (Rev. R) | 2018/6/25 |
設計與開發
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TPS51225EVM-133 — TPS51225 評估模組
TPS51225B Unencrypted PSpice Transient Model Package (Rev. A)
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| WQFN (RUK) | 20 | 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。