数据：
3-V TO 20-V INPUT SYNCHRONOUS BUCK CONTROLLER. 数据表 
TPS40304A是一款成本优化的同步降压控制器，工作电压范围为3 V至20 V。该控制器采用电压模式控制架构，具有输入电压前馈补偿，可立即响应输入电压变化。开关频率固定为600 kHz。
频率扩频功能为开关频率增加了抖动，大大降低了峰值EMI噪声，使其更容易符合EMI标准。
TPS40304A提供具有各种用户可编程功能的设计，包括软启动，过流保护（OCP）电平和环路补偿。
OCP电平由LDRV引脚连接的单个外部电阻编程电路接地。在初始上电期间，TPS40304A进入校准周期，测量LDRV引脚的电压，并设置内部OCP电压电平。在工作期间，将编程的OCP电压电平与低侧FET上的电压降进行比较，以确定是否存在过电流情况。然后，TPS40304A进入关闭和重启周期，直到故障消除为止。
| Vin (Min) (V) |
| Vin (Max) (V) |
| Vout (Min) (V) |
| Vout (Max) (V) |
| Iout (Max) (A) |
| Regulated Outputs (#) |
| Number of Phases |
| Switching Frequency (Min) (kHz) |
| Switching Frequency (Max) (kHz) |
| Iq (Typ) (mA) |
| Features |
| Duty Cycle (Max) (%) |
| Operating Temperature Range (C) |
| Rating |
| Package Group |
| Control Mode |
| TPS40304A | TPS40303 | TPS40304 | TPS40305 |
|---|---|---|---|
| 3 | 3 | 3 | 3 |
| 20 | 20 | 20 | 20 |
| 0.6 | 0.6 | 0.6 | 0.6 |
| 18 | 18 | 18 | 17 |
| 25 | 25 | 25 | 25 |
| 1 | 1 | 1 | 1 |
| 1 | 1 | 1 | 1 |
| 600 | 300 | 600 | 1200 |
| 600 | 300 | 600 | 1200 |
| 2.5 | 2.5 | 2.5 | 2.5 |
| Enable Power Good Pre-Bias Start-Up Spread Spectrum Synchronous Rectification | Enable Power Good Pre-Bias Start-Up Spread Spectrum Synchronous Rectification | Enable Power Good Pre-Bias Start-Up Spread Spectrum Synchronous Rectification | Enable Power Good Pre-Bias Start-Up Spread Spectrum Synchronous Rectification |
| 90 | 90 | 90 | 85 |
| -40 to 145 | -40 to 125 | -40 to 125 | -40 to 125 |
| Catalog | Catalog | Catalog | Catalog |
| VSON | VSON | VSON | VSON |
| Voltage Mode | Voltage Mode | Voltage Mode | Voltage Mode |
收藏
评论(0)