ZHCSB15B
May 2013 – October 2023
TPS54531
PRODUCTION DATA
1
1
特性
2
应用
3
说明
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
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
Voltage Reference (Vref)
7.3.3
Bootstrap Voltage (BOOT)
7.3.4
Enable and Adjustable Input Undervoltage Lockout (VIN UVLO)
7.3.5
Programmable Slow Start Using SS Pin
7.3.6
Error Amplifier
7.3.7
Slope Compensation
7.3.8
Current-Mode Compensation Design
7.3.9
Overcurrent Protection and Frequency Shift
7.3.10
Overvoltage Transient Protection
7.3.11
Thermal Shutdown
7.4
Device Functional Modes
7.4.1
Eco-mode
7.4.2
Operation With VIN < 3.5 V
7.4.3
Operation With EN Control
8
Application and Implementation
8.1
Application Information
8.2
Typical Application
8.2.1
Design Requirements
8.2.2
Detailed Design Procedure
8.2.2.1
Custom Design With WEBENCH® Tools
8.2.2.2
Switching Frequency
8.2.2.3
Output Voltage Set Point
8.2.2.4
Undervoltage Lockout Set Point
8.2.2.5
Input Capacitors
8.2.2.6
Output Filter Components
8.2.2.6.1
Inductor Selection
8.2.2.6.2
Capacitor Selection
8.2.2.7
Compensation Components
8.2.2.8
Bootstrap Capacitor
8.2.2.9
Catch Diode
8.2.2.10
Slow-Start Capacitor
8.2.2.11
Output Voltage Limitations
8.2.2.12
Power Dissipation Estimate
8.2.3
Application Curves
8.3
Power Supply Recommendations
8.4
Layout
8.4.1
Layout Guidelines
8.4.2
Layout Example
8.4.3
Electromagnetic Interference (EMI) Considerations
9
Device and Documentation Support
9.1
Device Support
9.1.1
Development Support
9.1.1.1
Custom Design With WEBENCH® Tools
9.2
接收文档更新通知
9.3
支持资源
9.4
Trademarks
9.5
静电放电警告
9.6
术语表
10
Mechanical, Packaging, and Orderable Information
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
PPTD058I
订购信息
zhcsb15b_oa
zhcsb15b_pm
6.6
Typical Characteristics
Figure 6-1
ON Resistance vs Junction Temperature
Figure 6-3
Switching Frequency vs Junction Temperature
Figure 6-5
Minimum Controllable ON Time vs Junction Temperature
Figure 6-7
SS Charge Current vs Junction Temperature
Figure 6-2
Shutdown Quiescent Current vs Input Voltage
Figure 6-4
Voltage Reference vs Junction Temperature
Figure 6-6
Minimum Controllable Duty Ratio vs Junction Temperature
Figure 6-8
Current-Limit Threshold vs Input Voltage