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数据: TPS5433xA 4.5V 至 28V 输入、3A 输出、同步 降压 DC-DC 转换器 数据表 (Rev. D)
TPS5433xA系列器件为同步转换器,输入电压范围介于4.5V和28V之间。该系列器件集成有低侧开关场效应晶体管( FET),免除了对外部二极管的需求,从而减少了组件数。
凭借集成的128mΩ和84mΩMOSFET,低I Q 以及轻负载时的脉冲跳跃模式,大大提升了效率。通过使能引脚可以将关断电源电流减小至2μA。该降压转换器的基准电压在整个温度范围内保持1.5%的精度,可为各类负载提供精确稳压。
高侧FET的逐周期电流限制可在过载情况下保护TPS5433xA系列器件,并通过低侧电源限流防止电流失控,从而实现功能增强。低侧灌电流限制可关闭低侧MOSFET,以防止过多的反向电流。在过流情况持续时间超过预设时间时,将触发断续保护功能。热关断将在芯片温度超出阈值时禁用器件,并在经过一段内置的热断续时间后次使能器件。
所有商标均为其各自所有者的财产。所有商标均为其各自所有者的财产。
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 |
TPS54336A | TPS54202 | TPS54231 | TPS54302 | TPS54331 | TPS54335-1A | TPS54335A | TPS54531 |
---|---|---|---|---|---|---|---|
4.5 | 4.5 | 3.5 | 4.5 | 3.5 | 4.5 | 4.5 | 3.5 |
28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 |
0.8 | 0.6 | 0.8 | 0.6 | 0.8 | 0.8 | 0.8 | 0.8 |
25 | 26 | 25 | 26 | 25 | 25 | 25 | 25 |
3 | 2 | 2 | 3 | 3 | 3 | 3 | 5 |
1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
340 | 390 | 570 | 290 | 570 | 50 | 50 | 570 |
340 | 590 | 570 | 510 | 570 | 1500 | 1500 | 570 |
0.6 | 0.04 | 0.075 | 0.04 | 0.11 | 0.6 | 0.6 | 0.11 |
Enable Light Load Efficiency Synchronous Rectification UVLO Adjustable | Enable Light Load Efficiency Pre-Bias Start-Up Synchronous Rectification UVLO Adjustable | Enable Light Load Efficiency UVLO Adjustable | Enable Light Load Efficiency Pre-Bias Start-Up Synchronous Rectification UVLO Adjustable | Enable Light Load Efficiency UVLO Adjustable | Enable Light Load Efficiency Synchronous Rectification UVLO Adjustable | Enable Light Load Efficiency Synchronous Rectification UVLO Adjustable | Enable Light Load Efficiency |
Current Mode | Current Mode | Current Mode | Current Mode | Current Mode | Current Mode | Current Mode | Current Mode |
90 | 100 | 90 | 100 | 90 | 90 | 90 | 90 |
-40 to 150 | -40 to 125 | -40 to 150 | -40 to 125 | -40 to 150 | -40 to 85 | -40 to 150 | -40 to 85 |
Catalog | Catalog | Catalog | Catalog | Catalog | Catalog | Catalog | Catalog |
SO PowerPAD VSON | SOT-23-THIN | SOIC | SOT-23-THIN | SO PowerPAD SOIC | VSON | SO PowerPAD VSON | SO PowerPAD |