ZHCSIN4B
August 2018 – June 2021
LM5146-Q1
PRODUCTION DATA
1
特性
2
应用
3
说明
4
Revision History
5
说明(续)
6
Pin Configuration and Functions
6.1
Wettable Flanks
7
Specifications
7.1
Absolute Maximum Ratings
7.2
ESD Ratings
7.3
Recommended Operating Conditions
7.4
Thermal Information
7.5
Electrical Characteristics
7.6
Switching Characteristics
7.7
Typical Characteristics
8
Detailed Description
8.1
Overview
8.2
Functional Block Diagram
8.3
Feature Description
8.3.1
Input Range (VIN)
8.3.2
Output Voltage Setpoint and Accuracy (FB)
8.3.3
High-Voltage Bias Supply Regulator (VCC)
8.3.4
Precision Enable (EN/UVLO)
8.3.5
Power Good Monitor (PGOOD)
8.3.6
Switching Frequency (RT, SYNCIN)
8.3.6.1
Frequency Adjust
8.3.6.2
Clock Synchronization
8.3.7
Configurable Soft Start (SS/TRK)
8.3.7.1
Tracking
8.3.8
Voltage-Mode Control (COMP)
8.3.9
Gate Drivers (LO, HO)
8.3.10
Current Sensing and Overcurrent Protection (ILIM)
8.3.11
OCP Duty Cycle Limiter
8.4
Device Functional Modes
8.4.1
Shutdown Mode
8.4.2
Standby Mode
8.4.3
Active Mode
8.4.4
Diode Emulation Mode
8.4.5
Thermal Shutdown
9
Application and Implementation
9.1
Application Information
9.1.1
Design and Implementation
9.1.2
Power Train Components
9.1.2.1
Inductor
9.1.2.2
Output Capacitors
9.1.2.3
Input Capacitors
9.1.2.4
Power MOSFETs
9.1.3
Control Loop Compensation
9.1.4
EMI Filter Design
9.2
Typical Applications
9.2.1
Design 1 – 12-A High-Efficiency Synchronous Buck DC/DC Regulator for Automotive Applications
9.2.1.1
Design Requirements
9.2.1.2
Detailed Design Procedure
9.2.1.3
Custom Design With WEBENCH® Tools
9.2.1.4
Custom Design With Excel Quickstart Tool
9.2.1.5
Application Curves
9.2.2
Design 2 – High Density, 12-V, 8-A Rail From 48-V Automotive Battery Power
9.2.2.1
Design Requirements
9.2.2.2
Detailed Design Procedure
9.2.2.3
Application Curves
10
Power Supply Recommendations
11
Layout
11.1
Layout Guidelines
11.1.1
Power Stage Layout
11.1.2
Gate Drive Layout
11.1.3
PWM Controller Layout
11.1.4
Thermal Design and Layout
11.1.5
Ground Plane Design
11.2
Layout Example
12
Device and Documentation Support
12.1
Device Support
12.1.1
第三方产品免责声明
12.1.2
Development Support
12.1.2.1
Custom Design With WEBENCH® Tools
12.2
Documentation Support
12.2.1
Related Documentation
12.2.1.1
PCB Layout Resources
12.2.1.2
Thermal Design Resources
12.3
接收文档更新通知
12.4
支持资源
12.5
Trademarks
12.6
Electrostatic Discharge Caution
12.7
Glossary
13
Mechanical, Packaging, and Orderable Information
12.7
Glossary
TI Glossary
This glossary lists and explains terms, acronyms, and definitions.