ZHCSD76I
January 2012 – August 2021
LM5018
PRODUCTION DATA
1
特性
2
应用
3
描述
4
Revision History
5
Pin Configuration and 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
Timing Requirements
6.7
Typical Characteristics
7
Detailed Description
7.1
Overview
7.2
Functional Block Diagram
7.3
Feature Description
7.3.1
Control Overview
7.3.2
VCC Regulator
7.3.3
Regulation Comparator
7.3.4
Overvoltage Comparator
7.3.5
On-Time Generator
7.3.6
Current Limit
7.3.7
N-Channel Buck Switch and Driver
7.3.8
Synchronous Rectifier
7.3.9
Undervoltage Detector
7.3.10
Thermal Protection
7.3.11
Ripple Configuration
7.3.12
Soft Start
7.4
Device Functional Modes
8
Application and Implementation
8.1
Application Information
8.2
Typical Applications
8.2.1
Application Circuit: 12.5- to 95-V Input and 10-V, 300-mA Output Buck Converter
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
RFB1, RFB2
8.2.1.2.3
Frequency Selection
8.2.1.2.4
Inductor Selection
8.2.1.2.5
Output Capacitor
8.2.1.2.6
Type II Ripple Circuit
8.2.1.2.7
VCC and Bootstrap Capacitor
8.2.1.2.8
Input Capacitor
8.2.1.2.9
UVLO Resistors
8.2.1.3
Application Curves
8.2.2
Typical Isolated DC-DC Converter Using LM5018
8.2.2.1
Design Requirements
8.2.2.2
Detailed Design Procedure
8.2.2.2.1
Transformer Turns Ratio
8.2.2.2.2
Total IOUT
8.2.2.2.3
RFB1, RFB2
8.2.2.2.4
Frequency Selection
8.2.2.2.5
Transformer Selection
8.2.2.2.6
Primary Output Capacitor
8.2.2.2.7
Secondary Output Capacitor
8.2.2.2.8
Type III Feedback Ripple Circuit
8.2.2.2.9
Secondary Diode
8.2.2.2.10
VCC and Bootstrap Capacitor
8.2.2.2.11
Input Capacitor
8.2.2.2.12
UVLO Resistors
8.2.2.2.13
VCC Diode
8.2.2.3
Application Curves
9
Power Supply Recommendations
10
Layout
10.1
Layout Guidelines
10.2
Layout Example
11
Device and Documentation Support
11.1
Device Support
11.1.1
Development Support
11.1.1.1
Custom Design With WEBENCH® Tools
11.2
Documentation Support
11.2.1
Related Documentation
11.3
接收文档更新通知
11.4
支持资源
11.5
Trademarks
11.6
Electrostatic Discharge Caution
11.7
术语表
12
Mechanical, Packaging, and Orderable Information
封装选项
机械数据 (封装 | 引脚)
DDA|8
MPDS092F
NGU|8
MPDS407A
散热焊盘机械数据 (封装 | 引脚)
DDA|8
PPTD058I
订购信息
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