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数据: Dual-Synchronous, Step-Down Controller With OOA Operation and 100-mA LDOs 数据表
TPS51125A是一款经济高效的双同步降压控制器,适用于笔记本电脑系统电源解决方案。它提供5 V和3.3 V LDO,几乎不需要外部元件。 270 kHz VCLK输出可用于驱动外部电荷泵,为负载开关产生栅极驱动电压,而不会降低主转换器的效率。 TPS51125A支持高效率,快速瞬态响应,并提供组合的电源良好信号。音频外模式轻载操作可实现低噪声,其效率远高于传统的强制PWM操作。自适应导通时间D-CAP控制提供方便和有效的操作。该器件采用5.5 V至28 V的电源输入电压工作,支持2 V至5.5 V的输出电压.TPS51125A采用24引脚QFN封装,额定温度范围为-40°C至85°C环境温度范围。
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 |
TPS51125A | TPS51120 | TPS51123 | TPS51124 | TPS51220 | TPS51220A |
---|---|---|---|---|---|
5.5 | 4.5 | 5.5 | 3 | 4.5 | 4.5 |
28 | 28 | 28 | 28 | 28 | 32 |
2 | 1 | 2 | 0.76 | 1 | 1 |
5.5 | 5.5 | 5.5 | 5.5 | 12 | 12 |
20 | 20 | 20 | 15 | 20 | 20 |
2 | 2 | 2 | 2 | 2 | 2 |
1 | 1 | 1 | 1 | 1 | 1 |
300 | 180 | 200 | 240 | 200 | 200 |
460 | 500 | 460 | 420 | 1000 | 1000 |
0.55 | 0.75 | 0.55 | 0.35 | 1.3 | 1.3 |
Enable Light Load Efficiency Power Good Synchronous Rectification | Enable Light Load Efficiency Power Good Synchronous Rectification | Enable Light Load Efficiency Power Good Synchronous Rectification | Enable Light Load Efficiency Power Good Synchronous Rectification | Enable Frequency Synchronization Light Load Efficiency Phase Interleaving Power Good Synchronous Rectification | Enable Frequency Synchronization Light Load Efficiency Phase Interleaving Power Good Synchronous Rectification |
93 | 88 | 93 | 88 | 99 | 99 |
-40 to 85 | -40 to 85 | -40 to 85 | -40 to 85 | -40 to 85 | -40 to 85 |
Catalog | Catalog | Catalog | Catalog | Catalog | Catalog |
VQFN | VQFN | VQFN | VQFN | VQFN | QFN WQFN |
D-CAP | Current Mode D-CAP | D-CAP | D-CAP | Current Mode D-CAP | |