ZHCS137F
March 2011 – October 2017
TPS54622
PRODUCTION DATA.
1
特性
2
应用
3
说明
Device Images
简化电路原理图
效率与负载电流间的关系
4
修订历史记录
5
Pin Configurations 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
Fixed-Frequency PWM Control
7.3.2
Continuous Current Mode Operation (CCM)
7.3.3
VIN and Power VIN Pins (VIN and PVIN)
7.3.4
Voltage Reference
7.3.5
Adjusting the Output Voltage
7.3.6
Safe Start-Up Into Prebiased Outputs
7.3.7
Error Amplifier
7.3.8
Slope Compensation
7.3.9
Enable and Adjusting Undervoltage Lockout
7.3.10
Adjustable Switching Frequency and Synchronization (RT/CLK)
7.3.11
Slow Start (SS/TR)
7.3.12
Power Good (PWRGD)
7.3.13
Output Overvoltage Protection (OVP)
7.3.14
Overcurrent Protection
7.3.14.1
High-Side MOSFET Overcurrent Protection
7.3.14.2
Low-Side MOSFET Overcurrent Protection
7.3.15
Thermal Shutdown
7.3.16
Small Signal Model for Loop Response
7.3.17
Simple Small Signal Model for Peak Current Mode Control
7.3.18
Small Signal Model for Frequency Compensation
7.4
Device Functional Modes
7.4.1
Adjustable Switching Frequency (RT Mode)
7.4.2
Synchronization (CLK Mode)
7.4.3
Bootstrap Voltage (BOOT) and Low Dropout Operation
7.4.4
Sequencing (SS/TR)
8
Application and Implementation
8.1
Application Information
8.2
Typical Application
8.2.1
Design Requirements
8.2.2
Detailed Design Procedures
8.2.2.1
Custom Design With WEBENCH® Tools
8.2.2.2
Operating Frequency
8.2.2.3
Output Inductor Selection
8.2.2.4
Output Capacitor Selection
8.2.2.5
Input Capacitor Selection
8.2.2.6
Slow-Start Capacitor Selection
8.2.2.7
Bootstrap Capacitor Selection
8.2.2.8
Undervoltage Lockout Setpoint
8.2.2.9
Output Voltage Feedback Resistor Selection
8.2.2.9.1
Minimum Output Voltage
8.2.2.10
Compensation Component Selection
8.2.2.11
Fast Transient Considerations
8.2.3
Application Curves
9
Power Supply Recommendations
10
Layout
10.1
Layout Guidelines
10.2
Layout Examples
10.3
Estimated Circuit Area
11
器件和文档支持
11.1
器件支持
11.1.1
Third-Party Products Disclaimer
11.1.2
开发支持
11.1.3
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
接收文档更新通知
11.4
社区资源
11.5
商标
11.6
静电放电警告
11.7
Glossary
12
机械、封装和可订购信息
封装选项
机械数据 (封装 | 引脚)
RHL|14
MPQF252H
散热焊盘机械数据 (封装 | 引脚)
订购信息
zhcs137f_oa
zhcs137f_pm
6
Specifications