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AC/DC & DC/DC controllers (external FET)

LM3743

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具有完整故障保护功能的高性能同步降压控制器

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数据表

LM3743

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产品详情

Vin (min) (V) 3 Vin (max) (V) 5.5 Iout (max) (A) 10 Operating temperature range (°C) -40 to 125 Control mode Voltage mode Rating Catalog Vout (min) (V) 0.8 Vout (max) (V) 4.6 Iq (typ) (A) 0.0018 Duty cycle (max) (%) 91
Vin (min) (V) 3 Vin (max) (V) 5.5 Iout (max) (A) 10 Operating temperature range (°C) -40 to 125 Control mode Voltage mode Rating Catalog Vout (min) (V) 0.8 Vout (max) (V) 4.6 Iq (typ) (A) 0.0018 Duty cycle (max) (%) 91
VSSOP (DGS) 10 14.7 mm² 3 x 4.9
  • 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

All trademarks are the property of their respective owners.

  • 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

All trademarks are the property of their respective owners.

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.

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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类型 标题 下载最新的英语版本 日期
* 数据表 LM3743 High-Perf Synch Buck Cntrler w/Compreh Fault Protect Features 数据表 (Rev. E) 2013年 4月 4日
选择指南 电源管理指南 2018 (Rev. K) 2018年 7月 31日
选择指南 电源管理指南 2018 (Rev. R) 2018年 6月 25日
模拟设计期刊 Reduce buck-converter EMI and voltage stress by minimizing inductive parasitics 2016年 7月 21日
EVM 用户指南 AN-1450 LM3743 Evaluation Board (Rev. A) 2013年 5月 7日
应用手册 LM3743 Hi Perf Controller w/Comp Fault Protect Feature for Hi Reliability System (Rev. A) 2013年 5月 6日
应用手册 Power Supply Design Considerations for Modern FPGAs 2010年 2月 2日
应用手册 App Note 1669 LM3743 High Perf Cntrlr w/Compr Fault Protection 最新英语版本 (Rev.A) 2007年 6月 19日
应用手册 Application Note 1450 LM3743 Evaluation Board (cn) 最新英语版本 (Rev.A) 2006年 9月 12日

设计和开发

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封装 引脚 下载
VSSOP (DGS) 10 查看选项
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订购和质量

包含信息：
  • RoHS
  • REACH
  • 器件标识
  • 引脚镀层/焊球材料
  • MSL 等级/回流焊峰值温度
  • MTBF/时基故障估算
  • 材料成分
  • 鉴定摘要
  • 持续可靠性监测
包含信息：
  • 制造厂地点
  • 封装厂地点

支持和培训

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