ZHCSG11
February 2017
TPS54340B-Q1
PRODUCTION DATA.
1
特性
2
应用
3
说明
4
修订历史记录
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
RT/CLK Timing Requirements
6.7
Switching Characteristics
6.8
Typical Characteristics
7
Detailed Description
7.1
Overview
7.2
Functional Block Diagram
7.3
Feature Description
7.3.1
Fixed-Frequency PWM Control
7.3.2
Slope Compensation Output Current
7.3.3
Pulse Skip Eco-mode™
7.3.4
Low Dropout Operation and Bootstrap Voltage (BOOT)
7.3.5
Error Amplifier
7.3.6
Adjusting the Output Voltage
7.3.7
Enable and Adjusting Undervoltage Lockout
7.3.8
Internal Soft-Start
7.3.9
Constant Switching Frequency and Timing Resistor (RT/CLK) Pin)
7.3.10
Accurate Current Limit Operation and Maximum Switchign Frequency
7.3.11
Synchronization to RT/CLK Pin
7.3.12
Overvoltage Protection
7.3.13
Thermal Shutdown
7.3.14
Small-Signal Model for Loop Response
7.3.15
Simple Small-Signal Model for Peak-Current-Mode Control
7.3.16
Small-Signal Model for Frequency Compensation
7.4
Device Functional Modes
8
Application and Implementation
8.1
Application Information
8.2
Typical Applications
8.2.1
Buck Converter With 6-V to 42-V Input and 3.3-V at 3.5-A Output
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
Selecting the Switching Frequency
8.2.1.2.3
Output Inductor Selection (LO)
8.2.1.2.4
Output Capacitor
8.2.1.2.5
Catch Diode
8.2.1.2.6
Input Capacitor
8.2.1.2.7
Bootstrap-Capacitor Selection
8.2.1.2.8
Undervoltage Lockout Set Point
8.2.1.2.9
Output Voltage and Feedback Resistors Selection
8.2.1.2.10
Minimum VIN
8.2.1.2.11
Compensation
8.2.1.2.12
Power Dissipation Estimate
8.2.1.2.13
Discontinuous Conduction Mode and Eco-mode™ Boundary
8.2.1.3
Application Curves
8.2.2
Inverting Power Supply
8.2.3
Split-Rail Power Supply
9
Power Supply Recommendations
10
Layout
10.1
Layout Guidelines
10.2
Layout Example
10.3
Estimated Circuit Area
11
器件和文档支持
11.1
器件支持
11.1.1
使用 WEBENCH® 工具定制设计方案
11.1.2
Third-Party Products Disclaimer
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
Glossary
12
机械、封装和可订购信息
封装选项
机械数据 (封装 | 引脚)
DDA|8
MPDS092F
散热焊盘机械数据 (封装 | 引脚)
DDA|8
PPTD178C
订购信息
zhcsg11_oa
4
修订历史记录
日期
修订版本
注释
2017 年2 月
*
最初发布。