ZHCSHW2I
June 2007 – September 2018
LM2735
PRODUCTION DATA.
1
特性
2
应用
3
说明
Device Images
典型的升压应用电路
效率与负载电流间的关系(VO = 12V)
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: LM2735
6.3
Recommended Operating Conditions
6.4
Thermal Information
6.5
Electrical Characteristics
6.6
Typical Characteristics
7
Detailed Description
7.1
Overview
7.1.1
Theory of Operation
7.2
Functional Block Diagram
7.3
Feature Description
7.3.1
Current Limit
7.3.2
Thermal Shutdown
7.3.3
Soft Start
7.3.4
Compensation
7.4
Device Functional Modes
7.4.1
Enable Pin and Shutdown Mode
8
Application and Implementation
8.1
Application Information
8.2
Typical Applications
8.2.1
LM2735X SOT-23 Design Example 1
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
Inductor Selection
8.2.1.2.3
Input Capacitor
8.2.1.2.4
Output Capacitor
8.2.1.2.5
Setting the Output Voltage
8.2.1.3
Application Curves
8.2.2
LM2735Y SOT-23 Design Example 2
8.2.3
LM2735X WSON Design Example 3
8.2.4
LM2735Y WSON Design Example 4
8.2.5
LM2735Y MSOP-PowerPAD Design Example 5
8.2.6
LM2735X SOT-23 Design Example 6
8.2.7
LM2735Y SOT-23 Design Example 7
8.2.8
LM2735X SOT-23 Design Example 8
8.2.9
LM2735Y SOT-23 Design Example 9
8.2.10
LM2735X WSON Design Example 10
8.2.11
LM2735Y WSON Design Example 11
8.2.12
LM2735X WSON SEPIC Design Example 12
8.2.13
LM2735Y MSOP-PowerPAD SEPIC Design Example 13
8.2.14
LM2735X SOT-23 LED Design Example 14
8.2.15
LM2735Y WSON FlyBack Design Example 15
8.2.16
LM2735X SOT-23 LED Design Example 16 VRAIL > 5.5 V Application
8.2.17
LM2735X SOT-23 LED Design Example 17 Two-Input Voltage Rail Application
8.2.18
SEPIC Converter
8.2.18.1
Detailed Design Procedure
8.2.18.1.1
SEPIC Design Guide
8.2.18.1.2
Small Ripple Approximation
8.2.18.1.3
Steady State Analysis With Loss Elements
9
Power Supply Recommendations
10
Layout
10.1
Layout Guidelines
10.1.1
WSON Package
10.2
Layout Examples
10.3
Thermal Considerations
10.3.1
Definitions
10.3.2
PCB Design With Thermal Performance in Mind
10.3.3
LM2735 Thermal Models
10.3.4
Calculating Efficiency, and Junction Temperature
10.3.4.1
Example Efficiency Calculation
10.3.5
Calculating RθJA and RΨJC
10.3.5.1
Procedure
10.3.5.2
Example From Previous Calculations
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
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)
NGG|6
MPDS395
DGN|8
MPDS046G
DBV|5
MPDS018T
散热焊盘机械数据 (封装 | 引脚)
DGN|8
PPTD274A
订购信息
zhcshw2i_oa
zhcshw2i_pm
1
特性
输入电压范围:2.7V 至 5.5V
输出电压范围:3V 至 24V
在整个温度范围内具有 2.1A 的开关电流
电流模式控制
逻辑高电平使能引脚
在关断模式下具有 80nA 的超低静态电流
170mΩ NMOS 开关
±2% 反馈电压精度
易于使用的小型解决方案总尺寸
内部软启动
内部补偿
两种开关频率
520kHz (LM2735-Y)
1.6MHz (LM2735-X)
使用小型表面贴装电感器和片式电容器
微型 SOT-23、WSON 和 MSOP-PowerPAD™封装
使用 LM2735 并借助
WEBENCH® 电源设计器
创建定制设计