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LM43603稳压器是一款易于使用的同步降压直流/直流转换器，能够驱动高达3A的负载电流，输入电压范围为3.5 V至36V（最大绝对值42V）.LM43603以极小的解决方案尺寸提供优异的效率，输出精度和压降。扩展系列产品能够以引脚到引脚兼容封装提供0.5A，1A和2A负载电流选项。采用峰值电流模式控制来实现简单控制环路补偿和逐周期电流限制。可选功能包括可编程开关频率，同步，电源正常标志，精确使能，内部软启动，可扩展软启动和跟踪，可为各种应用提供灵活且易于使用的平台。轻载时的断续传导和自动频率调制可提升轻载效率。此系列只需要很少的外部组件，并且引脚排列可实现简单，最优的印刷电路板（PCB）布局布线。保护功能包括热关断，V CC 欠压锁定，逐周期电流限制和输出短路保护.LM43603器件采用HTSSOP /PWP 16引线式封装（5.1mm×6.6mm×1.2mm）和可湿侧面的VSON-16封装.HTSSOP封装与LM43600，LM43601，LM43602，LM46000，LM46001，LM46002实现了引脚对引脚的兼容.VSON-16封装仅与LM43602实现了引脚对引脚的兼容。
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 |
| LM43603 | LM2575-N | LM2576 | LM2596 | LM43602 | LMR14030 | LMR23630 | LMR33620 | LMR33630 | TPS5430 | TPS54340 |
|---|---|---|---|---|---|---|---|---|---|---|
| 3.5 | 4 | 4 | 4.5 | 3.5 | 4 | 4.5 | 3.8 | 3.8 | 5.5 | 4.5 |
| 36 | 40 | 40 | 40 | 36 | 40 | 36 | 36 | 36 | 36 | 42 |
| 1 | 3.3 | 3.3 | 3.3 | 1 | 1 | 1 | 1 | 1.23 | 0.8 | |
| 28 | 37 | 37 | 37 | 28 | 36 | 30 | 34 | 34 | 31 | 41 |
| 3 | 1 | 3 | 3 | 2 | 3.5 | 3 | 2 | 3 | 3 | 3.5 |
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| 200 | 42 | 42 | 110 | 200 | 200 | 200 | 400 | 400 | 500 | 100 |
| 2200 | 63 | 63 | 173 | 2200 | 2500 | 2200 | 2100 | 2100 | 500 | 2500 |
| 0.027 | 10 | 5 | 5 | 0.027 | 0.04 | 0.075 | 0.024 | 0.024 | 3 | 0.146 |
| Enable Frequency Synchronization Light Load Efficiency Power Good Synchronous Rectification Tracking | Enable | Enable | Enable | Enable Frequency Synchronization Light Load Efficiency Power Good Synchronous Rectification Tracking | Enable Frequency Synchronization Light Load Efficiency Power Good Pre-Bias Start-Up Tracking UVLO Adjustable | Enable Frequency Synchronization Light Load Efficiency Pre-Bias Start-Up Synchronous Rectification UVLO Adjustable | Enable Light Load Efficiency Power Good Pre-Bias Start-Up Synchronous Rectification Wettable Flanks Package | Enable Light Load Efficiency Power Good Pre-Bias Start-Up Synchronous Rectification | Enable | Enable Frequency Synchronization Light Load Efficiency UVLO Adjustable |
| Current Mode | Voltage Mode | Voltage Mode | Voltage Mode | Current Mode | Current Mode | Current Mode | Current Mode | Current Mode | Voltage Mode | Current Mode |
| 99 | 98 | 98 | 100 | 99 | 98 | 97 | 98 | 98 | 87 | 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 125 | -40 to 125 | -40 to 125 |
| Catalog | Catalog | Catalog | Catalog | Catalog | Catalog | Catalog | Catalog | Catalog | Catalog | Catalog |
| HTSSOP SON | DDPAK/TO-263 PDIP SOIC TO-220 | DDPAK/TO-263 TO-220 | DDPAK/TO-263 TO-220 | HTSSOP SON | SO PowerPAD | SO PowerPAD SON | SO PowerPAD VQFN-HR | SO PowerPAD VQFN-HR | SO PowerPAD | SO PowerPAD |
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