ZHCSJM8
April 2019
LM2840-Q1
,
LM2841-Q1
,
LM2842-Q1
PRODUCTION DATA.
1
特性
2
应用
3
说明
Device Images
典型应用电路
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
Protection
7.4
Device Functional Modes
7.4.1
Continuous Conduction Mode
8
Application and Implementation
8.1
Application Information
8.2
Typical Applications
8.2.1
Design Requirements
8.2.2
Detailed Design Procedure
8.2.2.1
Custom Design With WEBENCH® Tools
8.2.2.2
Setting the Output Voltage
8.2.2.3
Inductor Selection
8.2.2.4
Input Capacitor
8.2.2.5
Output Capacitor
8.2.2.6
Bootstrap Capacitor
8.2.2.7
Soft-Start Components
8.2.2.8
Shutdown Operation
8.2.2.9
Schottky Diode
8.2.3
Application Curves
8.2.4
Other Application Circuits
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
第三方产品免责声明
11.1.2
开发支持
11.1.2.1
使用 WEBENCH® 工具创建定制设计
11.2
文档支持
11.2.1
相关文档
11.3
相关链接
11.4
接收文档更新通知
11.5
社区资源
11.6
商标
11.7
静电放电警告
11.8
Glossary
12
机械、封装和可订购信息
封装选项
机械数据 (封装 | 引脚)
DDC|6
MPDS124G
散热焊盘机械数据 (封装 | 引脚)
订购信息
zhcsjm8_oa
6.6
Typical Characteristics
The part numbers in this section represent both the Q1 and non-Q1 versions of the respective parts.
LM2842X
V
OUT
= 3.3 V
Figure 1.
Efficiency vs Load Current
LM2840X
V
OUT
= 8 V
Figure 3.
Efficiency vs Load Current
Figure 5.
Input UVLO Voltage vs Temperature
Soft-Start Implementation
LM2842
Figure 7.
Switch Current Limit vs
SHDN
Pin Voltage
LM2841X
V
OUT
= 3.3 V
Figure 2.
Efficiency vs Load Current
X option
Figure 4.
Switching Frequency vs Temperature
Soft-Start Implementation
LM284[0,1]
Figure 6.
Switch Current Limit vs
SHDN
Pin Voltage
Figure 8.
SHDN
Pin Current vs
SHDN
Pin Voltage