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数据： 具有 Eco-mode™ 的 TPS54540 4.5V 至 42V 输入、5A 降压直流/直流转换器 数据表 (Rev. B)
TPS54540是一款42V，5A，降压稳压器，此稳压器具有一个集成的高侧MOSFET。按照ISO 7637标准，此器件能够耐受高达45V的抛负载脉冲。电流模式控制提供了简单的外部补偿和灵活的组件选择。一个低纹波脉冲跳跃模式将无负载时的电源电流减小至146μA。当启用引脚被拉至低电平时，关断电源电流被减少至2μA。
欠压闭锁在内部设定为4.3V，但可用使能引脚将之提高。输出电压启动斜升由内部控制以提供一个受控的启动并且消除过冲。
宽开关频率范围可实现对效率或者外部组件尺寸的优化。输出电流是受限的逐周期电流。频率折返和热关断在过载条件下保护内部和外部组件。
TPS54540可提供8引脚热增强型HSOP PowerPAD™封装。
所有商标均为他们各自的所有者。
| 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 |
| TPS54540 | LM73605 | LM73606 | LMS3655 | TPS54040A | TPS54140A | TPS54240 | TPS54340 | TPS54341 | TPS54541 |
|---|---|---|---|---|---|---|---|---|---|
| 4.5 | 3.5 | 3.5 | 3.5 | 3.5 | 3.5 | 3.5 | 4.5 | 4.5 | 4.5 |
| 42 | 36 | 36 | 42 | 42 | 42 | 42 | 42 | 42 | 42 |
| 0.8 | 1 | 1 | 1 | 0.8 | 0.8 | 0.8 | 0.8 | 0.8 | 0.8 |
| 41.1 | 34 | 34 | 15 | 39 | 39 | 39 | 41 | 41 | 41 |
| 5 | 5 | 6 | 5.5 | 0.5 | 1.5 | 2.5 | 3.5 | 3.5 | 5 |
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| 100 | 350 | 350 | 250 | 100 | 100 | 100 | 100 | 100 | 100 |
| 2500 | 2200 | 2200 | 500 | 2500 | 2500 | 2500 | 2500 | 2500 | 2500 |
| 0.146 | 0.015 | 0.015 | 0.015 | 0.116 | 0.116 | 0.138 | 0.146 | 0.152 | 0.152 |
| Enable Frequency Synchronization Light Load Efficiency UVLO Adjustable | Enable Forced Pulse Width Modulation (FPWM) Mode Frequency Synchronization Light Load Efficiency Over Current Protection Power Good Pre-Bias Start-Up Synchronous Rectification UVLO Fixed Wettable Flanks Package | Enable Forced Pulse Width Modulation (FPWM) Mode Frequency Synchronization Light Load Efficiency Over Current Protection Power Good Pre-Bias Start-Up Synchronous Rectification UVLO Fixed Wettable Flanks Package | Enable Frequency Synchronization Light Load Efficiency Power Good Pre-Bias Start-Up Synchronous Rectification | Enable Frequency Synchronization Light Load Efficiency Power Good Tracking UVLO Adjustable | Enable Frequency Synchronization Light Load Efficiency Power Good Tracking UVLO Adjustable | Enable Frequency Synchronization Light Load Efficiency Power Good Tracking UVLO Adjustable | Enable Frequency Synchronization Light Load Efficiency UVLO Adjustable | Enable Frequency Synchronization Light Load Efficiency Power Good Tracking UVLO Adjustable | Enable Frequency Synchronization Light Load Efficiency Power Good Tracking UVLO Adjustable |
| Current Mode | Current Mode | Current Mode | Current Mode | Current Mode | Current Mode | Current Mode | Current Mode | Current Mode | Current Mode |
| 98 | 96 | 95 | 98 | 98 | 98 | 98 | 98 | 98 | 98 |
| -40 to 125 | -40 to 125 | -40 to 125 | -40 to 125 | -40 to 125 | -40 to 125 | -40 to 125 | -40 to 125 | -40 to 85 | -40 to 85 |
| Catalog | Catalog | Catalog | Catalog | Catalog | Catalog | Catalog | Catalog | Catalog | Catalog |
| SO PowerPAD | WQFN | WQFN | VQFN-HR | MSOP-PowerPAD VSON | MSOP-PowerPAD VSON | MSOP-PowerPAD VSON | SO PowerPAD | WSON | WSON |
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