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TPS56121是一款工作电源电压在4.5 V与14 V之间的高效率大电流同步降压转换器。该器件可在高达15 A的负载下产生低至0.6 V的输出电压。集成型NexFET功率MOSFET可带来小型化与易用性优势。
该器件可通过电压前馈补偿实施电压模式控制，能够在输入电压变化时立即做出响应。
TPS56121采用热增强型22-引PQFN（DQP）PowerPAD封装。
该器件支持高度的设计灵活性，可提供OCP级可以通过由ILIM引脚连接至电路接地的单个外部电阻器进行编程。中，该器件可进入校准环节，测量ILIM引脚电压，并设置内部l OCP电压级。在工作中，可在通电时通过将可编程OCP电压级与整个低侧FET的电压压降进行比较来判断是否为过流状况。然后，其可在消除故障后进入关断/重启环节。
| Vin (Min) (V) |
| Vin (Max) (V) |
| Vout (Min) (V) |
| Vout (Max) (V) |
| Iout (Max) (A) |
| Regulated Outputs (#) |
| Switching Frequency (Min) (kHz) |
| Switching Frequency (Max) (kHz) |
| Iq (Typ) (mA) |
| Features |
| Control Mode |
| Duty Cycle (Max) (%) |
| Operating Temperature Range (C) |
| Rating |
| Package Group |
| TPS56121 | TPS53353 | TPS53355 | TPS548B22 | TPS548D22 | TPS549B22 | TPS549D22 | TPS56221 |
|---|---|---|---|---|---|---|---|
| 4.5 | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | 4.5 |
| 14 | 15 | 15 | 18 | 16 | 18 | 16 | 14 |
| 0.6 | 0.6 | 0.6 | 0.6 | 0.6 | 0.6 | 0.6 | 0.6 |
| 12 | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 | 12 |
| 15 | 20 | 30 | 25 | 40 | 25 | 40 | 25 |
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| 300 | 250 | 250 | 425 | 425 | 315 | 315 | 300 |
| 1000 | 1000 | 1000 | 1050 | 1050 | 1125 | 1125 | 1000 |
| 2.5 | 0.32 | 0.32 | 2 | 2 | 2 | 2 | 2.5 |
| Adjustable Current Limit Enable Power Good Pre-Bias Start-Up Synchronous Rectification | Adjustable Current Limit Enable Light Load Efficiency Power Good Pre-Bias Start-Up Synchronous Rectification | Adjustable Current Limit Enable Light Load Efficiency Power Good Pre-Bias Start-Up Synchronous Rectification | Adjustable Current Limit Enable Light Load Efficiency Output Discharge Power Good Pre-Bias Start-Up Remote Sense Synchronous Rectification UVLO Adjustable | Adjustable Current Limit Enable Light Load Efficiency Output Discharge Power Good Pre-Bias Start-Up Remote Sense Synchronous Rectification UVLO Adjustable | Adjustable Current Limit Dynamic Voltage Scaling Enable Light Load Efficiency Output Discharge Over Current Protection PMBus Power Good Pre-Bias Start-Up Remote Sense Synchronous Rectification UVLO Adjustable Voltage Margining | Adjustable Current Limit Dynamic Voltage Scaling Enable Light Load Efficiency PMBus Power Good Pre-Bias Start-Up Remote Sense Synchronous Rectification Tracking UVLO Adjustable Voltage Margining | Enable Light Load Efficiency Pre-Bias Start-Up Synchronous Rectification |
| Voltage Mode | D-CAP | D-CAP | D-CAP3 | D-CAP3 | D-CAP3 | D-CAP3 | Voltage Mode |
| 93 | 90 | 90 | 80 | 80 | 80 | 80 | 93 |
| -40 to 125 | -40 to 85 | -40 to 85 | -40 to 125 | -40 to 125 | -40 to 125 | -40 to 85 | -40 to 125 |
| Catalog | Catalog | Catalog | Catalog | Catalog | Catalog | Catalog | Catalog |
| LSON-CLIP | LSON-CLIP | LSON-CLIP | LQFN-CLIP | LQFN-CLIP | LQFN-CLIP | LQFN-CLIP | LSON-CLIP |
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