数据:
TPS65251-x 具有集成 FET 的 4.5V 至 18V 输入、高电流、三路同步降压开关 数据表 (Rev. A)
TPS65251-x特有3个宽输入范围的同步高效率降压转换器。这款转换器设计用于简化其应用,同时使得设计
这款转换器可在5V,9V,12V或15V系统下工作,并且集成有功率晶体管。可使用外部电阻分压器将输出电压设置为0.8V与输入电源值的关系调节软启动时间;电流限制(RLIMx)引脚,使设计人员能够通过选择外部电阻来调节电流限制并优化电感的选择。这款转换器具有电流模式控制,可简化RC补偿。
< p>转换器的开关频率可根据需要选择通过ROSC引脚所连接的外部电阻来设置,或者与SYNC引脚所连接的外部时钟同步。开关稳压器设计为在300kHz至2.2MHz频率变围开关1与降压开关2和3之间180°异相运行p> TPS65251-x特有监控电路,用于监视每个转换器输出。完成排序后会将PGOOD引脚置为有效,并报告所有PG信号,期间耗时为一段可选的复位结束时间.PGOOD信号的极性为高电平有效。所有转换器均特有一个自动低功耗脉冲PFM跳跃模式,此模式提升了轻负载和待机运行期间的效率,而与此同时又保证一个极低的输出纹波,从而在低输出电压上实现一个低于2%的值。
所有商标ar e各自所有者的财产。
| 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 |
| TPS65251-3 | TPS65251 | TPS65251-1 | TPS65251-2 | TPS65261 | TPS65261-1 | TPS65262-1 | TPS65263 |
|---|---|---|---|---|---|---|---|
| 4.5 | 4.5 | 4.5 | 4.5 | 4.5 | 4.5 | 1.3 | 4.5 |
| 17 | 18 | 17 | 17 | 18 | 18 | 18 | 18 |
| 0.8 | 0.8 | 0.8 | 0.8 | 0.6 | 0.6 | 0.6 | 0.6 |
| 17 | 17 | 17 | 17 | 17 | 17 | ||
| 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 |
| 3 | 3 | 3 | 3 | 3 | 3 | 5 | 3 |
| 300 | 300 | 300 | 300 | 250 | 250 | 540 | 550 |
| 2200 | 2200 | 2200 | 2200 | 2000 | 2000 | 670 | 650 |
| 1 | 20 | 1 | 1 | 0.6 | 0.6 | 0.79 | 0.74 |
| Adjustable Current Limit Enable Frequency Synchronization Light Load Efficiency Phase Interleaving Power Good Synchronous Rectification UVLO Adjustable | Adjustable Current Limit Enable Frequency Synchronization Phase Interleaving Power Good Synchronous Rectification UVLO Adjustable | Adjustable Current Limit Enable Frequency Synchronization Light Load Efficiency Phase Interleaving Power Good Synchronous Rectification UVLO Adjustable | Adjustable Current Limit Enable Frequency Synchronization Light Load Efficiency Phase Interleaving Power Good Synchronous Rectification UVLO Adjustable | Enable Light Load Efficiency Power Good Synchronous Rectification UVLO Adjustable | Enable Power Good Synchronous Rectification UVLO Adjustable | Adjustable Current Limit Enable Light Load Efficiency Power Good Synchronous Rectification UVLO Adjustable | Adjustable Current Limit Dynamic Voltage Scaling Enable Light Load Efficiency Power Good Synchronous Rectification UVLO Adjustable |
| Current Mode | Current Mode | Current Mode | Current Mode | Current Mode | Current Mode | Current Mode | Current Mode |
| 90 | 100 | 90 | 90 | 95 | 95 | 100 | 100 |
| -40 to 125 | -40 to 125 | -40 to 125 | -40 to 125 | -40 to 85 | -40 to 85 | -40 to 85 | -40 to 85 |
| Catalog | Catalog | Catalog | Catalog | Catalog | Catalog | Catalog | Catalog |
| VQFN | VQFN | VQFN | VQFN | VQFN | VQFN | VQFN | VQFN |
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