LM3743
- Input Voltage From 3.0V to 5.5V
- Output Voltage Adjustable Down to 0.8V
- Reference Accuracy: ±1.75%, over Full Temperature and Input Voltage Range
- High-Side and Low-Side N-Channel MOSFETs
- Switching Frequency Options of 1 MHz or 300 kHz
- Comprehensive Fault Protection Features:
- High-Side Current Limit
- Low-Side Current Limit
- Output Under-Voltage Protection
- Hiccup Mode Protection Eliminates Thermal Runaway During Fault Conditions
- Externally Programmable Soft-Start with Tracking Capability
- Pre-Bias Start-Up Capability
- VSSOP-10 Package
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The LM3743 is a DC-DC voltage mode PWM buck controller featuring synchronous rectification at 300 kHz or 1 MHz. It can deliver current as high as 20A and step down from an input voltage between 3V and 5.5V down to a minimum output voltage of 0.8V, with a ±1.75% internal reference accuracy. The LM3743 provides a set of comprehensive fault protection features such as high-side current limit, output under-voltage protection, and low-side current limit. When any of these fault protection features are engaged, it enters a hiccup protection mode which is suitable for high reliability systems such as rack mounted servers and telecom base station subsystems. The LM3743 also employs a proprietary monolithic glitch free pre-bias start-up method suited for FPGA and ASIC logic devices. An external programmable soft-start allows for tracking and timing flexibility. The driver features 1.6Ω of pull-up resistance and 1Ω of pull-down drive resistance for high power density and very efficient power processing.
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技術文件
| 重要文件 | 類型 | 標題 | 格式選項 | 下載最新的英文版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 資料表 | LM3743 High-Perf Synch Buck Cntrler w/Compreh Fault Protect Features datasheet (Rev. E) | 2013/4/4 | |||
| 選擇指南 | Power Management Guide 2018 (Rev. R) | 2018/6/25 | ||||
| 類比設計期刊 | Reduce buck-converter EMI and voltage stress by minimizing inductive parasitics | 2016/7/21 | ||||
| 應用說明 | LM3743 Hi Perf Controller w/Comp Fault Protect Feature for Hi Reliability System (Rev. A) | 2013/5/6 | ||||
| 應用說明 | Power Supply Design Considerations for Modern FPGAs (Power Designer 121) | 2010/2/2 |
設計與開發
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| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| VSSOP (DGS) | 10 | Ultra Librarian |