ZHCSJE9I
April 2004 – February 2019
LM2743
PRODUCTION DATA.
1
特性
2
应用
3
说明
Device Images
典型应用图
4
修订历史记录
5
Pin Configuration and Functions
Pin Functions
6
Specifications
6.1
Absolute Maximum Ratings
6.2
ESD Ratings
6.3
Recommended Operating Conditions
6.4
Thermal Information
6.5
Electrical Characteristics
6.6
Typical Characteristics
7
Detailed Description
7.1
Overview
7.2
Functional Block Diagram
7.3
Feature Description
7.3.1
Start Up and Soft-Start
7.3.2
Normal Operation
7.3.3
Tracking a Voltage Level
7.3.4
Tracking Voltage Slew Rate
7.3.5
Sequencing
7.3.6
SD Pin Impedance
7.3.7
MOSFET Gate Drivers
7.3.8
Power Good Signal
7.3.9
UVLO
7.3.10
Current Limit
7.3.11
Foldback Current Limit
7.4
Device Functional Modes
7.4.1
Shutdown
8
Application and Implementation
8.1
Application Information
8.2
Typical Applications
8.2.1
Synchronous Buck Converter Typical Application using LM2743
8.2.1.1
Design Requirements
8.2.1.2
Detailed Design Procedure
8.2.1.2.1
Custom Design With WEBENCH® Tools
8.2.1.2.2
Duty Cycle Calculation
8.2.1.2.3
Input Capacitor
8.2.1.2.4
Output Inductor
8.2.1.2.5
Output Capacitor
8.2.1.2.6
MOSFETs
8.2.1.2.7
Support Components
8.2.1.2.8
Control Loop Compensation
8.2.1.2.9
Efficiency Calculations
8.2.1.3
Application Curves
8.2.2
Example Circuit 1
8.2.2.1
Design Requirements
8.2.2.2
Detailed Design Procedure
8.2.2.3
Bill of Materials
8.2.3
Example Circuit 2
8.2.3.1
Design Requirements
8.2.3.2
Detailed Design Procedure
8.2.3.3
Bill of Materials
8.2.4
Example Circuit 3
8.2.4.1
Design Requirements
8.2.4.2
Detailed Design Procedure
8.2.4.3
Bill of Materials
9
Power Supply Recommendations
10
Layout
10.1
Layout Guidelines
10.2
Layout Example
11
器件和文档支持
11.1
器件支持
11.1.1
开发支持
11.1.1.1
使用 WEBENCH® 工具创建定制设计
11.2
接收文档更新通知
11.3
社区资源
11.4
商标
11.5
静电放电警告
11.6
术语表
12
机械、封装和可订购信息
封装选项
机械数据 (封装 | 引脚)
PW|14
MPDS360
散热焊盘机械数据 (封装 | 引脚)
PW|14
QFND305D
订购信息
zhcsje9i_oa
zhcsje9i_pm
1
特性
1V 至 16V 的功率级输入电压
3V 至 6V 的控制级输入电压
低至 0.6V 的可调节输出电压
电源正常状态标志和关断功能
过压和欠压检测
整个温度范围内的反馈电压精度为 ±2%
低侧可调节电流检测
可调节软启动
具有关断和软启动引脚的跟踪和定序功能
50kHz 至 1MHz 的开关频率
TSSOP-14 封装
使用 LM2743 并借助
WEBENCH® 电源设计器
创建定制设计