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LM20323是一款全功能500kHz同步降压稳压器,能够提供高达3A的负载电流。电流模式控制环路仅通过两个组件进行外部补偿,提供高性能和易用性。该器件经过优化,可在4.5V至36V的输入电压范围内工作,非常适合高压系统。
该器件具有内部过压保护(OVP)和过流保护(OCP)电路提高系统可靠性。精密的使能引脚和集成的UVLO可以严格控制和排序器件的开启。启动浪涌电流受内部固定和外部可调软启动电路的限制。集成电源良好(PGOOD)电路可实现故障检测和电源排序。
LM20323设计用于多轨电源架构。器件的输出电压可配置为使用SS /TRK引脚跟踪更高的电压轨。如果LM20323的输出在启动时预偏置,它将不会吸收电流以将输出拉低,直到内部软启动斜坡超过反馈引脚的电压。
LM20323提供裸露焊盘20引脚HTSSOP封装,可焊接到PCB上,无需使用笨重的散热器。
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| 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 |
| LM20323 | LM20323 | LM3100 | LM3102 | LM3102-Q1 | LM3103 |
|---|---|---|---|---|---|
| 4.5 | 4.5 | 4.5 | 4.5 | 4.5 | 4.5 |
| 36 | 36 | 36 | 42 | 42 | 42 |
| 0.8 | 0.8 | 0.8 | 0.8 | 0.8 | 0.6 |
| 32 | 32 | 7 | 7 | 7 | 7 |
| 3 | 3 | 1.5 | 2.5 | 2.5 | 0.75 |
| 1 | 1 | 1 | 1 | 1 | 1 |
| 500 | 500 | 200 | 200 | 200 | 200 |
| 500 | 500 | 1000 | 1000 | 1000 | 1000 |
| 2.3 | 2.3 | 1 | 1 | 1 | 1 |
| Enable Power Good Pre-Bias Start-Up Synchronous Rectification Tracking | Enable Power Good Pre-Bias Start-Up Synchronous Rectification Tracking | Enable Synchronous Rectification Tracking | Enable Synchronous Rectification Tracking | Enable Synchronous Rectification | Enable Synchronous Rectification Tracking |
| Current Mode | Current Mode | COT with emulated ripple | COT with emulated ripple | COT with emulated ripple | COT with emulated ripple |
| 80 | 80 | 94 | 94 | 94 | 94 |
| -40 to 125 | -40 to 125 | -40 to 125 | -40 to 125 | -40 to 125 | -40 to 125 |
| Catalog | Catalog | Catalog | Catalog | Automotive | Catalog |
| HTSSOP | HTSSOP | HTSSOP | DSBGA HTSSOP | HTSSOP | HTSSOP |